SmogRank / Episodes / Japan
Japan, 21 to 25 July 2026
For 5 days, from 21 to 25 July 2026, 172 cities in Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Mooka, Tochigi, Japan: 39.1 µg/m³ on 25 July, about 4.6× its usual 8.5.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 172 in 1 country
Days 5 21 to 25 July 2026
Worst day 22 July 104 cities counted
Furthest above usual 5.1× Sumoto
Day by day
Play 22 July 104 cities at twice their usual or more
Uji Yawata Sugai Hirakata Nara-shi Hōryūji Tenri Kōka Ōmihachiman Osaka Habikino Kawachi-Nagano Obama Kameyama Maizuru Kinokawa Tsuruga Yokkaichi Kaizu Ōgaki Ibi Hashima Mizuho Ama Motosu Kaminoma Ichinomiya Gifu Sabae Handa Nagoya Kakamigahara Minamichita Chiryū Sekimachi Ono Anjō Seto Minokamo Kani Mikuni Tajimi Toki Tahara Kaga Komatsu Gero Matsutō Nonoichi Kanazawa Tsubata Oyabe Tonami Kurayoshi Iida Takaoka Hakui Asakuchi Himimachi Imizu Niimi Namerikawa Nanao Uozu Okaya Matsumoto Yonago Suwa Anamizu Shizuoka Nyūzen Yasugichō Sakaiminato Onomichi Niihama Chikuma Mihara Saijō Matsue Ueda Itoigawa Unnan Imabari Saku Takehara Yamanashi Miyoshi Suzaka Izumo Susono Ōtsuki Matsuyama Jōetsu Minamiashigara Ōdachō-ōda Kure Iyo Tomioka Uenohara Hiroshima Chichibu Nakanojō Ōme Shibukawa Kodamachō-kodamaminami Yorii Atsugi Gōtsuchō Ebina Honjō Hannō Ogawamachi Morohongō Ayase Akishima Numata Yokota Iruma Minamirinkan Yamato Fujisawa Uwajima Machida Sakai-nakajima Iwakuni Yawatahama Sayama Sakado Fuchū Higashimurayama Minamiuonuma Hamada Kamakura Kodaira Tokorozawa Higashi-Matsuyama Kumagaya Azamino Higashikurume Menuma Igusa Kawagoe Miura Noborito Ōta Kiryū Yanai Gyōda Niiza Yokohama Yokosuka Kōnosu Asaka Kurihama Ashikaga Hanyū Ageo Tatebayashi Tokyo Nagaoka Saitama Kazo Masuda Kawaguchi Hikari Sado Sano Kukichūō Tateyama Kudamatsu Kasukabe Kimitsu Sōka Koshigaya Koga Minamibōsō Kisarazu Urayasu Misato, Saitama Matsudo Maki Noda Tochigi Bandō Oyama Sodegaura Kanuma Imaichi Kashiwa Kamagaya Shirone Jōsō Narashino Ichihara Kunisaki Shimo-tsuma Chiba Kaminokawa Toride Yachiyo Niitsu-honchō Utsunomiya Chikusei Saiki Niigata Yotsukaidō Kameda-honchō Inzai Hagi Naka Katsuura Mobara Ajiki Yaita Ōami Yachimata Hiji Narita Ōhara Tōgane Inashiki Ishioka Shibata Nagato Mine Nasukarasuyama Ube Kasama Nasushiobara Yokoshiba Onoda Sawara Sōsa Nakatsu Mito Hokota Aizu-Wakamatsu Hitachiomiya Buzen Omigawa Hitachi-Naka Shirakawa Kanda Shimonoseki Yukuhashi Kitakyushu Hitachi Hita Aso Tagawa Kōriyama Shintomi Yonezawa Nakama Nōgata Koga Kitaibaraki Iizuka Ukiha Miyazaki Ōzu Kikuchi Tanushimarumachi-toyoki Munakata Fukushima Yame Wakasugi Mifune Koga Iwaki Ogōri Kotō Uekimachi-mōno Tosu Kasuga Kumamoto Nichinan Fukuoka Chikugo Tamana Uto Yamagata Sagae Kanzakimachi-kanzaki Ōmuta Shiroishi Yanagawa Arao Hitoyoshi Honmachi Higashine Saga Maebaru-chūō Kakuda Minami-Sōma Sōma Ōyanomachi-noboritate Iwanuma Kirishima Natori-shi Sendai Minamata Kanoya Izumi Yoshioka Tagajō-shi Kagoshima Matsushima Ōsaki Sendai Higashimatsushima Kushikino Wakuya Minamikyushu Ishinomaki Kaseda-shirakame Nagai Kasaoka Kofu Aihara Shikokuchūō Minawa Iwata Fujiyoshida Tsuchiura Kan’onjichō Owariasahi Hachiōji Sōja Fukuyama Yufu Higashiosaka Ōtake Okazaki Ikoma Anan Toyama Gion Kamisu Kochi Mima Gotemba Tōkai Amagasaki Kuwana Miyazu Narutochō-mitsuishi Shin’ichi Fujinomiya Hyūga Marugame Ikedachō Yao Nagano Fuji Kariya Fukui-shi Youkaichi Hadano Chigasaki Kurashiki Higashihiroshima Nagahama Nishio Nishinomiya Nakamura Jōyō Saikū Hiratsuka Tsukumiura Izunokuni Toyota Nantan Ino Takashima Shūnan Yoshinogawa Atami Kashihara-shi Fukuchiyama Hikone Ayabe Kashiwara Sandachō Tottori-shi Nabari Nankoku Kizugawa Matsusaka Tokoname Kashima-shi Isehara Kamojimachō-jōgejima Zentsujichó Sakura Ōtsu Kyōtango Numazu Gobō Owase Shimoda Toyonaka Iga Suzuka Toyooka Inabe Kosai Kyoto Sakai Minami-Alps Nobeoka Okayama Fukuroi Bizen Fuefuki Kikugawa Kusatsu Yae Nisshin Tsu Hamamatsu Hōfu Kōtari Sayama Takayama Ueno-ebisumachi Gamagōri Akashi Himeji Odawara Minato Ikaruga Hekinan Kitahama Tokushima Tondabayashichō Kobe Toba Takanabe Takahashi Kameoka Kishiwada Higashinozoe Iwade Fujieda Hamakita Ise Shimada Kakegawa Takarazuka Tsurusaki Tamano Kakogawachō-honmachi Hiragi Aioi Tatsuno Shinagawa Shima Izumi Hashimoto Aki Tsuyama Kainan Susaki Kariya Inuyama Shinshiro Kumano Sennan Toyohashi Izumisano Ono Takatsuki Takamatsu Takinomiya Shingū Miyakonojō Yono Tanabe Shido Yamaguchi Mie Ōita Beppu Nishiwaki Mooka Kobayashi Sumoto 18 Jul 19 20 21 22 23 24 25 26 27 28 Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.
How it spread
Shido Shido, 18 July: 19.2 µg/m³ Shido, 19 July: 16.4 µg/m³ Shido, 20 July: 21.3 µg/m³ Shido, 21 July: 28.7 µg/m³, 3.2× its usual 8.9 Shido, 22 July: 36.9 µg/m³, 4.2× its usual 8.7 Shido, 23 July: 23.0 µg/m³ Shido, 24 July: 24.1 µg/m³ Shido, 25 July: 19.1 µg/m³ Shido, 26 July: 15.0 µg/m³ Shido, 27 July: 16.1 µg/m³ Shido, 28 July: 12.6 µg/m³ Bizen Bizen, 18 July: 19.6 µg/m³ Bizen, 19 July: 17.6 µg/m³ Bizen, 20 July: 18.4 µg/m³ Bizen, 21 July: 27.4 µg/m³, 2.5× its usual 11.0 Bizen, 22 July: 36.8 µg/m³, 3.3× its usual 11.0 Bizen, 23 July: 33.3 µg/m³, 3.1× its usual 10.8 Bizen, 24 July: 17.4 µg/m³ Bizen, 25 July: 18.5 µg/m³ Bizen, 26 July: 12.5 µg/m³ Bizen, 27 July: 13.9 µg/m³ Bizen, 28 July: 15.1 µg/m³ Kariya Kariya, 18 July: 18.2 µg/m³ Kariya, 19 July: 16.9 µg/m³ Kariya, 20 July: 19.4 µg/m³ Kariya, 21 July: 28.4 µg/m³, 2.8× its usual 10.1 Kariya, 22 July: 36.4 µg/m³, 3.8× its usual 9.7 Kariya, 23 July: 34.2 µg/m³, 3.5× its usual 9.7 Kariya, 24 July: 17.5 µg/m³ Kariya, 25 July: 17.8 µg/m³ Kariya, 26 July: 15.5 µg/m³ Kariya, 27 July: 15.1 µg/m³ Kariya, 28 July: 13.2 µg/m³ Tatsuno Tatsuno, 18 July: 17.6 µg/m³ Tatsuno, 19 July: 16.6 µg/m³ Tatsuno, 20 July: 19.8 µg/m³ Tatsuno, 21 July: 27.5 µg/m³, 2.8× its usual 10.0 Tatsuno, 22 July: 36.3 µg/m³, 3.7× its usual 9.9 Tatsuno, 23 July: 31.8 µg/m³, 3.2× its usual 9.8 Tatsuno, 24 July: 18.0 µg/m³ Tatsuno, 25 July: 16.9 µg/m³ Tatsuno, 26 July: 15.3 µg/m³ Tatsuno, 27 July: 14.2 µg/m³ Tatsuno, 28 July: 13.7 µg/m³ Aioi Aioi, 18 July: 17.9 µg/m³ Aioi, 19 July: 16.9 µg/m³ Aioi, 20 July: 21.2 µg/m³ Aioi, 21 July: 29.3 µg/m³, 2.8× its usual 10.3 Aioi, 22 July: 36.2 µg/m³, 3.7× its usual 9.8 Aioi, 23 July: 34.9 µg/m³, 3.6× its usual 9.8 Aioi, 24 July: 18.5 µg/m³ Aioi, 25 July: 17.7 µg/m³ Aioi, 26 July: 14.9 µg/m³ Aioi, 27 July: 14.3 µg/m³ Aioi, 28 July: 13.4 µg/m³ Beppu Beppu, 18 July: 23.3 µg/m³ Beppu, 19 July: 30.0 µg/m³ Beppu, 20 July: 21.1 µg/m³ Beppu, 21 July: 35.7 µg/m³, 4.4× its usual 8.2 Beppu, 22 July: 25.5 µg/m³, 3.1× its usual 8.2 Beppu, 23 July: 17.7 µg/m³ Beppu, 24 July: 15.4 µg/m³ Beppu, 25 July: 14.3 µg/m³ Beppu, 26 July: 16.3 µg/m³ Beppu, 27 July: 10.0 µg/m³ Beppu, 28 July: 9.7 µg/m³ Ono Ono, 18 July: 18.8 µg/m³ Ono, 19 July: 17.2 µg/m³ Ono, 20 July: 19.5 µg/m³ Ono, 21 July: 30.0 µg/m³, 3.2× its usual 9.5 Ono, 22 July: 35.0 µg/m³, 3.9× its usual 9.0 Ono, 23 July: 22.4 µg/m³ Ono, 24 July: 17.5 µg/m³ Ono, 25 July: 16.8 µg/m³ Ono, 26 July: 15.9 µg/m³ Ono, 27 July: 10.7 µg/m³ Ono, 28 July: 12.5 µg/m³ Ōita Ōita, 18 July: 24.5 µg/m³ Ōita, 19 July: 24.8 µg/m³ Ōita, 20 July: 25.6 µg/m³ Ōita, 21 July: 34.5 µg/m³, 4.3× its usual 8.1 Ōita, 22 July: 24.5 µg/m³ Ōita, 23 July: 17.7 µg/m³ Ōita, 24 July: 16.6 µg/m³ Ōita, 25 July: 13.7 µg/m³ Ōita, 26 July: 8.6 µg/m³ Ōita, 27 July: 14.6 µg/m³ Ōita, 28 July: 15.5 µg/m³ Kakogawachō-honmachi Kakogawachō-honmachi, 18 July: 18.3 µg/m³ Kakogawachō-honmachi, 19 July: 16.5 µg/m³ Kakogawachō-honmachi, 20 July: 19.6 µg/m³ Kakogawachō-honmachi, 21 July: 29.7 µg/m³, 3.0× its usual 9.8 Kakogawachō-honmachi, 22 July: 34.4 µg/m³, 3.6× its usual 9.6 Kakogawachō-honmachi, 23 July: 22.7 µg/m³ Kakogawachō-honmachi, 24 July: 16.3 µg/m³ Kakogawachō-honmachi, 25 July: 17.0 µg/m³ Kakogawachō-honmachi, 26 July: 15.8 µg/m³ Kakogawachō-honmachi, 27 July: 13.8 µg/m³ Kakogawachō-honmachi, 28 July: 13.3 µg/m³ Kobayashi Kobayashi, 18 July: 18.7 µg/m³ Kobayashi, 19 July: 17.4 µg/m³ Kobayashi, 20 July: 19.7 µg/m³ Kobayashi, 21 July: 31.9 µg/m³, 5.1× its usual 6.2 Kobayashi, 22 July: 27.2 µg/m³, 4.3× its usual 6.3 Kobayashi, 23 July: 19.4 µg/m³ Kobayashi, 24 July: 24.5 µg/m³ Kobayashi, 25 July: 33.5 µg/m³, 4.9× its usual 6.8 Kobayashi, 26 July: 17.9 µg/m³ Kobayashi, 27 July: 24.0 µg/m³ Kobayashi, 28 July: 18.5 µg/m³ Nishiwaki Nishiwaki, 18 July: 18.1 µg/m³ Nishiwaki, 19 July: 17.5 µg/m³ Nishiwaki, 20 July: 19.4 µg/m³ Nishiwaki, 21 July: 30.0 µg/m³, 3.9× its usual 7.6 Nishiwaki, 22 July: 33.2 µg/m³, 4.5× its usual 7.4 Nishiwaki, 23 July: 21.3 µg/m³ Nishiwaki, 24 July: 15.5 µg/m³ Nishiwaki, 25 July: 16.8 µg/m³ Nishiwaki, 26 July: 14.7 µg/m³ Nishiwaki, 27 July: 11.5 µg/m³ Nishiwaki, 28 July: 13.1 µg/m³ Ikaruga Ikaruga, 18 July: 17.8 µg/m³ Ikaruga, 19 July: 16.5 µg/m³ Ikaruga, 20 July: 19.4 µg/m³ Ikaruga, 21 July: 28.3 µg/m³, 2.9× its usual 9.6 Ikaruga, 22 July: 32.6 µg/m³, 3.4× its usual 9.5 Ikaruga, 23 July: 31.2 µg/m³, 3.3× its usual 9.5 Ikaruga, 24 July: 19.2 µg/m³ Ikaruga, 25 July: 17.3 µg/m³ Ikaruga, 26 July: 16.2 µg/m³ Ikaruga, 27 July: 15.7 µg/m³ Ikaruga, 28 July: 12.7 µg/m³ Tsuyama Tsuyama, 18 July: 20.6 µg/m³ Tsuyama, 19 July: 16.6 µg/m³ Tsuyama, 20 July: 18.4 µg/m³ Tsuyama, 21 July: 28.4 µg/m³, 3.1× its usual 9.1 Tsuyama, 22 July: 32.5 µg/m³, 3.8× its usual 8.6 Tsuyama, 23 July: 15.7 µg/m³ Tsuyama, 24 July: 12.6 µg/m³ Tsuyama, 25 July: 12.7 µg/m³ Tsuyama, 26 July: 9.6 µg/m³ Tsuyama, 27 July: 11.7 µg/m³ Tsuyama, 28 July: 12.3 µg/m³ Mie Mie, 18 July: 29.3 µg/m³ Mie, 19 July: 27.1 µg/m³ Mie, 20 July: 26.2 µg/m³ Mie, 21 July: 32.4 µg/m³, 4.3× its usual 7.5 Mie, 22 July: 29.2 µg/m³, 3.9× its usual 7.5 Mie, 23 July: 23.3 µg/m³ Mie, 24 July: 25.2 µg/m³, 3.2× its usual 7.9 Mie, 25 July: 18.9 µg/m³ Mie, 26 July: 10.0 µg/m³ Mie, 27 July: 16.3 µg/m³ Mie, 28 July: 15.9 µg/m³ Higashinozoe Higashinozoe, 18 July: 17.6 µg/m³ Higashinozoe, 19 July: 17.0 µg/m³ Higashinozoe, 20 July: 18.0 µg/m³ Higashinozoe, 21 July: 29.0 µg/m³, 3.0× its usual 9.6 Higashinozoe, 22 July: 32.4 µg/m³, 3.5× its usual 9.3 Higashinozoe, 23 July: 27.7 µg/m³, 2.9× its usual 9.4 Higashinozoe, 24 July: 17.1 µg/m³ Higashinozoe, 25 July: 18.0 µg/m³ Higashinozoe, 26 July: 16.5 µg/m³ Higashinozoe, 27 July: 14.3 µg/m³ Higashinozoe, 28 July: 14.7 µg/m³ Tamano Tamano, 18 July: 19.4 µg/m³ Tamano, 19 July: 16.8 µg/m³ Tamano, 20 July: 19.8 µg/m³ Tamano, 21 July: 26.5 µg/m³, 2.9× its usual 9.0 Tamano, 22 July: 32.1 µg/m³, 3.6× its usual 9.0 Tamano, 23 July: 22.0 µg/m³ Tamano, 24 July: 18.0 µg/m³ Tamano, 25 July: 16.8 µg/m³ Tamano, 26 July: 14.0 µg/m³ Tamano, 27 July: 17.1 µg/m³ Tamano, 28 July: 11.9 µg/m³ Hiragi Hiragi, 18 July: 19.9 µg/m³ Hiragi, 19 July: 16.0 µg/m³ Hiragi, 20 July: 20.3 µg/m³ Hiragi, 21 July: 27.9 µg/m³, 3.2× its usual 8.7 Hiragi, 22 July: 31.6 µg/m³, 3.7× its usual 8.6 Hiragi, 23 July: 19.5 µg/m³ Hiragi, 24 July: 18.8 µg/m³ Hiragi, 25 July: 16.1 µg/m³ Hiragi, 26 July: 12.2 µg/m³ Hiragi, 27 July: 12.9 µg/m³ Hiragi, 28 July: 9.9 µg/m³ Tottori-shi Tottori-shi, 18 July: 25.4 µg/m³ Tottori-shi, 19 July: 25.1 µg/m³ Tottori-shi, 20 July: 24.5 µg/m³ Tottori-shi, 21 July: 31.5 µg/m³, 3.1× its usual 10.3 Tottori-shi, 22 July: 23.5 µg/m³ Tottori-shi, 23 July: 12.9 µg/m³ Tottori-shi, 24 July: 15.0 µg/m³ Tottori-shi, 25 July: 17.1 µg/m³ Tottori-shi, 26 July: 13.3 µg/m³ Tottori-shi, 27 July: 12.1 µg/m³ Tottori-shi, 28 July: 16.1 µg/m³ Okayama Okayama, 18 July: 19.5 µg/m³ Okayama, 19 July: 16.1 µg/m³ Okayama, 20 July: 18.6 µg/m³ Okayama, 21 July: 26.4 µg/m³, 2.8× its usual 9.6 Okayama, 22 July: 31.5 µg/m³, 3.3× its usual 9.5 Okayama, 23 July: 23.7 µg/m³ Okayama, 24 July: 16.5 µg/m³ Okayama, 25 July: 15.4 µg/m³ Okayama, 26 July: 12.4 µg/m³ Okayama, 27 July: 13.5 µg/m³ Okayama, 28 July: 13.4 µg/m³ Sandachō Sandachō, 18 July: 18.6 µg/m³ Sandachō, 19 July: 15.5 µg/m³ Sandachō, 20 July: 17.4 µg/m³ Sandachō, 21 July: 26.7 µg/m³, 2.6× its usual 10.2 Sandachō, 22 July: 31.0 µg/m³, 3.1× its usual 10.0 Sandachō, 23 July: 21.1 µg/m³ Sandachō, 24 July: 15.1 µg/m³ Sandachō, 25 July: 14.7 µg/m³ Sandachō, 26 July: 13.8 µg/m³ Sandachō, 27 July: 8.7 µg/m³ Sandachō, 28 July: 11.8 µg/m³ Mima Mima, 18 July: 21.5 µg/m³ Mima, 19 July: 18.0 µg/m³ Mima, 20 July: 21.1 µg/m³ Mima, 21 July: 25.6 µg/m³, 2.3× its usual 11.3 Mima, 22 July: 31.0 µg/m³, 2.8× its usual 11.1 Mima, 23 July: 25.9 µg/m³, 2.3× its usual 11.1 Mima, 24 July: 26.4 µg/m³, 2.3× its usual 11.3 Mima, 25 July: 19.2 µg/m³ Mima, 26 July: 15.2 µg/m³ Mima, 27 July: 16.4 µg/m³ Mima, 28 July: 13.4 µg/m³ Yamaguchi Yamaguchi, 18 July: 20.3 µg/m³ Yamaguchi, 19 July: 23.0 µg/m³ Yamaguchi, 20 July: 21.2 µg/m³ Yamaguchi, 21 July: 30.6 µg/m³, 4.3× its usual 7.2 Yamaguchi, 22 July: 20.0 µg/m³ Yamaguchi, 23 July: 9.3 µg/m³ Yamaguchi, 24 July: 12.0 µg/m³ Yamaguchi, 25 July: 8.3 µg/m³ Yamaguchi, 26 July: 8.8 µg/m³ Yamaguchi, 27 July: 11.0 µg/m³ Yamaguchi, 28 July: 5.0 µg/m³ Tsurusaki Tsurusaki, 18 July: 24.1 µg/m³ Tsurusaki, 19 July: 22.1 µg/m³ Tsurusaki, 20 July: 18.2 µg/m³ Tsurusaki, 21 July: 30.0 µg/m³, 3.6× its usual 8.4 Tsurusaki, 22 July: 19.7 µg/m³ Tsurusaki, 23 July: 13.0 µg/m³ Tsurusaki, 24 July: 13.6 µg/m³ Tsurusaki, 25 July: 12.6 µg/m³ Tsurusaki, 26 July: 7.9 µg/m³ Tsurusaki, 27 July: 13.6 µg/m³ Tsurusaki, 28 July: 12.7 µg/m³ Nobeoka Nobeoka, 18 July: 22.3 µg/m³ Nobeoka, 19 July: 18.4 µg/m³ Nobeoka, 20 July: 21.5 µg/m³ Nobeoka, 21 July: 28.8 µg/m³, 3.1× its usual 9.3 Nobeoka, 22 July: 30.0 µg/m³, 3.3× its usual 9.1 Nobeoka, 23 July: 27.7 µg/m³, 3.0× its usual 9.1 Nobeoka, 24 July: 27.6 µg/m³, 2.9× its usual 9.4 Nobeoka, 25 July: 26.5 µg/m³, 2.9× its usual 9.1 Nobeoka, 26 July: 19.9 µg/m³ Nobeoka, 27 July: 19.0 µg/m³ Nobeoka, 28 July: 23.1 µg/m³ Nagahama Nagahama, 18 July: 20.1 µg/m³ Nagahama, 19 July: 10.5 µg/m³ Nagahama, 20 July: 17.2 µg/m³ Nagahama, 21 July: 28.3 µg/m³, 2.8× its usual 10.0 Nagahama, 22 July: 29.9 µg/m³, 3.0× its usual 10.0 Nagahama, 23 July: 13.5 µg/m³ Nagahama, 24 July: 11.7 µg/m³ Nagahama, 25 July: 17.3 µg/m³ Nagahama, 26 July: 12.6 µg/m³ Nagahama, 27 July: 9.0 µg/m³ Nagahama, 28 July: 11.7 µg/m³ Ikedachō Ikedachō, 18 July: 20.1 µg/m³ Ikedachō, 19 July: 17.8 µg/m³ Ikedachō, 20 July: 21.2 µg/m³ Ikedachō, 21 July: 26.8 µg/m³, 2.5× its usual 10.6 Ikedachō, 22 July: 29.9 µg/m³, 2.9× its usual 10.3 Ikedachō, 23 July: 28.7 µg/m³, 2.8× its usual 10.3 Ikedachō, 24 July: 25.5 µg/m³, 2.4× its usual 10.6 Ikedachō, 25 July: 19.1 µg/m³ Ikedachō, 26 July: 15.5 µg/m³ Ikedachō, 27 July: 14.8 µg/m³ Ikedachō, 28 July: 12.5 µg/m³ Himeji Himeji, 18 July: 16.1 µg/m³ Himeji, 19 July: 15.5 µg/m³ Himeji, 20 July: 17.8 µg/m³ Himeji, 21 July: 26.0 µg/m³, 2.8× its usual 9.2 Himeji, 22 July: 29.9 µg/m³, 3.4× its usual 8.8 Himeji, 23 July: 22.7 µg/m³ Himeji, 24 July: 16.6 µg/m³ Himeji, 25 July: 16.2 µg/m³ Himeji, 26 July: 15.0 µg/m³ Himeji, 27 July: 12.2 µg/m³ Himeji, 28 July: 11.8 µg/m³ Kurashiki Kurashiki, 18 July: 18.9 µg/m³ Kurashiki, 19 July: 15.3 µg/m³ Kurashiki, 20 July: 20.0 µg/m³ Kurashiki, 21 July: 25.3 µg/m³, 2.6× its usual 9.7 Kurashiki, 22 July: 29.1 µg/m³, 3.0× its usual 9.6 Kurashiki, 23 July: 19.8 µg/m³ Kurashiki, 24 July: 15.0 µg/m³ Kurashiki, 25 July: 14.3 µg/m³ Kurashiki, 26 July: 11.7 µg/m³ Kurashiki, 27 July: 14.2 µg/m³ Kurashiki, 28 July: 12.2 µg/m³ Sumoto Sumoto, 18 July: 18.4 µg/m³ Sumoto, 19 July: 16.7 µg/m³ Sumoto, 20 July: 17.5 µg/m³ Sumoto, 21 July: 22.4 µg/m³ Sumoto, 22 July: 29.5 µg/m³, 4.4× its usual 6.7 Sumoto, 23 July: 34.2 µg/m³, 5.1× its usual 6.7 Sumoto, 24 July: 17.2 µg/m³ Sumoto, 25 July: 17.8 µg/m³ Sumoto, 26 July: 16.2 µg/m³ Sumoto, 27 July: 15.2 µg/m³ Sumoto, 28 July: 14.8 µg/m³ Iwade Iwade, 18 July: 22.1 µg/m³ Iwade, 19 July: 17.4 µg/m³ Iwade, 20 July: 16.3 µg/m³ Iwade, 21 July: 21.1 µg/m³ Iwade, 22 July: 26.1 µg/m³, 2.7× its usual 9.6 Iwade, 23 July: 33.5 µg/m³, 3.5× its usual 9.7 Iwade, 24 July: 28.0 µg/m³, 2.8× its usual 10.1 Iwade, 25 July: 19.4 µg/m³ Iwade, 26 July: 16.5 µg/m³ Iwade, 27 July: 15.1 µg/m³ Iwade, 28 July: 15.2 µg/m³ Fukuroi Fukuroi, 18 July: 6.2 µg/m³ Fukuroi, 19 July: 6.9 µg/m³ Fukuroi, 20 July: 13.4 µg/m³ Fukuroi, 21 July: 22.1 µg/m³ Fukuroi, 22 July: 25.5 µg/m³, 2.6× its usual 9.9 Fukuroi, 23 July: 32.6 µg/m³, 3.3× its usual 10.0 Fukuroi, 24 July: 27.3 µg/m³, 2.8× its usual 9.9 Fukuroi, 25 July: 25.2 µg/m³, 2.5× its usual 9.9 Fukuroi, 26 July: 10.9 µg/m³ Fukuroi, 27 July: 9.9 µg/m³ Fukuroi, 28 July: 9.0 µg/m³ Zentsujichó Zentsujichó, 18 July: 23.2 µg/m³ Zentsujichó, 19 July: 17.8 µg/m³ Zentsujichó, 20 July: 22.0 µg/m³ Zentsujichó, 21 July: 23.5 µg/m³ Zentsujichó, 22 July: 31.9 µg/m³, 3.2× its usual 9.9 Zentsujichó, 23 July: 20.0 µg/m³ Zentsujichó, 24 July: 18.0 µg/m³ Zentsujichó, 25 July: 15.1 µg/m³ Zentsujichó, 26 July: 13.4 µg/m³ Zentsujichó, 27 July: 13.4 µg/m³ Zentsujichó, 28 July: 10.3 µg/m³ Gotemba Gotemba, 18 July: 7.7 µg/m³ Gotemba, 19 July: 2.8 µg/m³ Gotemba, 20 July: 12.0 µg/m³ Gotemba, 21 July: 17.0 µg/m³ Gotemba, 22 July: 25.7 µg/m³, 2.2× its usual 11.6 Gotemba, 23 July: 31.9 µg/m³, 2.8× its usual 11.4 Gotemba, 24 July: 22.9 µg/m³ Gotemba, 25 July: 24.4 µg/m³ Gotemba, 26 July: 8.0 µg/m³ Gotemba, 27 July: 9.6 µg/m³ Gotemba, 28 July: no reading Takinomiya Takinomiya, 18 July: 16.7 µg/m³ Takinomiya, 19 July: 15.5 µg/m³ Takinomiya, 20 July: 17.2 µg/m³ Takinomiya, 21 July: 23.6 µg/m³ Takinomiya, 22 July: 31.1 µg/m³, 4.0× its usual 7.8 Takinomiya, 23 July: 18.7 µg/m³ Takinomiya, 24 July: 15.4 µg/m³ Takinomiya, 25 July: 13.3 µg/m³ Takinomiya, 26 July: 11.4 µg/m³ Takinomiya, 27 July: 11.8 µg/m³ Takinomiya, 28 July: 10.5 µg/m³ Takamatsu Takamatsu, 18 July: 17.2 µg/m³ Takamatsu, 19 July: 15.1 µg/m³ Takamatsu, 20 July: 16.9 µg/m³ Takamatsu, 21 July: 24.7 µg/m³ Takamatsu, 22 July: 31.1 µg/m³, 4.0× its usual 7.7 Takamatsu, 23 July: 19.3 µg/m³ Takamatsu, 24 July: 18.4 µg/m³ Takamatsu, 25 July: 14.6 µg/m³ Takamatsu, 26 July: 12.5 µg/m³ Takamatsu, 27 July: 13.5 µg/m³ Takamatsu, 28 July: 9.8 µg/m³ Toyohashi Toyohashi, 18 July: 10.8 µg/m³ Toyohashi, 19 July: no reading Toyohashi, 20 July: 9.3 µg/m³ Toyohashi, 21 July: 18.0 µg/m³ Toyohashi, 22 July: 26.2 µg/m³, 3.3× its usual 7.9 Toyohashi, 23 July: 21.7 µg/m³ Toyohashi, 24 July: 30.8 µg/m³, 3.9× its usual 7.9 Toyohashi, 25 July: 17.8 µg/m³ Toyohashi, 26 July: 16.1 µg/m³ Toyohashi, 27 July: 9.3 µg/m³ Toyohashi, 28 July: 7.4 µg/m³ Kameoka Kameoka, 18 July: 18.8 µg/m³ Kameoka, 19 July: 14.5 µg/m³ Kameoka, 20 July: 15.3 µg/m³ Kameoka, 21 July: 24.8 µg/m³ Kameoka, 22 July: 30.3 µg/m³, 3.5× its usual 8.7 Kameoka, 23 July: 16.4 µg/m³ Kameoka, 24 July: 11.4 µg/m³ Kameoka, 25 July: 14.7 µg/m³ Kameoka, 26 July: 11.0 µg/m³ Kameoka, 27 July: 8.7 µg/m³ Kameoka, 28 July: 9.9 µg/m³ Akashi Akashi, 18 July: 16.7 µg/m³ Akashi, 19 July: 15.5 µg/m³ Akashi, 20 July: 15.9 µg/m³ Akashi, 21 July: 24.3 µg/m³ Akashi, 22 July: 29.8 µg/m³, 3.4× its usual 8.7 Akashi, 23 July: 27.5 µg/m³, 3.1× its usual 8.8 Akashi, 24 July: 15.8 µg/m³ Akashi, 25 July: 16.3 µg/m³ Akashi, 26 July: 14.9 µg/m³ Akashi, 27 July: 12.4 µg/m³ Akashi, 28 July: 14.2 µg/m³ Takarazuka Takarazuka, 18 July: 19.0 µg/m³ Takarazuka, 19 July: 14.5 µg/m³ Takarazuka, 20 July: 16.1 µg/m³ Takarazuka, 21 July: 24.1 µg/m³ Takarazuka, 22 July: 29.4 µg/m³, 3.6× its usual 8.1 Takarazuka, 23 July: 21.7 µg/m³ Takarazuka, 24 July: 15.0 µg/m³ Takarazuka, 25 July: 16.6 µg/m³ Takarazuka, 26 July: 13.7 µg/m³ Takarazuka, 27 July: 8.7 µg/m³ Takarazuka, 28 July: 13.1 µg/m³ Higashihiroshima Higashihiroshima, 18 July: 19.9 µg/m³ Higashihiroshima, 19 July: 17.1 µg/m³ Higashihiroshima, 20 July: 21.2 µg/m³ Higashihiroshima, 21 July: 23.0 µg/m³ Higashihiroshima, 22 July: 29.4 µg/m³, 3.0× its usual 9.8 Higashihiroshima, 23 July: 18.8 µg/m³ Higashihiroshima, 24 July: 13.6 µg/m³ Higashihiroshima, 25 July: 11.3 µg/m³ Higashihiroshima, 26 July: 10.2 µg/m³ Higashihiroshima, 27 July: 13.5 µg/m³ Higashihiroshima, 28 July: 11.9 µg/m³ Kamisu Kamisu, 18 July: 7.0 µg/m³ Kamisu, 19 July: 4.2 µg/m³ Kamisu, 20 July: 10.2 µg/m³ Kamisu, 21 July: 19.4 µg/m³ Kamisu, 22 July: 29.3 µg/m³, 2.8× its usual 10.6 Kamisu, 23 July: 24.1 µg/m³ Kamisu, 24 July: 10.1 µg/m³ Kamisu, 25 July: 12.5 µg/m³ Kamisu, 26 July: 12.1 µg/m³ Kamisu, 27 July: 9.1 µg/m³ Kamisu, 28 July: 11.0 µg/m³ Yono Yono, 18 July: no reading Yono, 19 July: 14.5 µg/m³ Yono, 20 July: 15.3 µg/m³ Yono, 21 July: 24.7 µg/m³ Yono, 22 July: 29.2 µg/m³, 4.1× its usual 7.1 Yono, 23 July: 16.5 µg/m³ Yono, 24 July: 10.5 µg/m³ Yono, 25 July: 14.1 µg/m³ Yono, 26 July: 9.9 µg/m³ Yono, 27 July: 8.8 µg/m³ Yono, 28 July: 10.7 µg/m³ Takahashi Takahashi, 18 July: 19.4 µg/m³ Takahashi, 19 July: 16.9 µg/m³ Takahashi, 20 July: 16.9 µg/m³ Takahashi, 21 July: 21.2 µg/m³ Takahashi, 22 July: 29.1 µg/m³, 3.5× its usual 8.4 Takahashi, 23 July: 14.8 µg/m³ Takahashi, 24 July: 11.0 µg/m³ Takahashi, 25 July: 10.1 µg/m³ Takahashi, 26 July: 7.9 µg/m³ Takahashi, 27 July: 10.6 µg/m³ Takahashi, 28 July: 12.0 µg/m³ Shingū Shingū, 18 July: 17.9 µg/m³ Shingū, 19 July: 8.7 µg/m³ Shingū, 20 July: 12.4 µg/m³ Shingū, 21 July: 17.8 µg/m³ Shingū, 22 July: 19.3 µg/m³ Shingū, 23 July: 33.4 µg/m³, 4.0× its usual 8.3 Shingū, 24 July: 30.7 µg/m³, 3.7× its usual 8.3 Shingū, 25 July: 25.7 µg/m³, 3.1× its usual 8.2 Shingū, 26 July: 19.7 µg/m³ Shingū, 27 July: 16.5 µg/m³ Shingū, 28 July: 18.0 µg/m³ Kainan Kainan, 18 July: 19.5 µg/m³ Kainan, 19 July: 15.0 µg/m³ Kainan, 20 July: 14.8 µg/m³ Kainan, 21 July: 19.7 µg/m³ Kainan, 22 July: 24.4 µg/m³ Kainan, 23 July: 33.4 µg/m³, 3.8× its usual 8.7 Kainan, 24 July: 27.4 µg/m³, 3.1× its usual 8.8 Kainan, 25 July: 19.8 µg/m³ Kainan, 26 July: 16.6 µg/m³ Kainan, 27 July: 16.1 µg/m³ Kainan, 28 July: 17.9 µg/m³ Tanabe Tanabe, 18 July: 19.2 µg/m³ Tanabe, 19 July: 13.0 µg/m³ Tanabe, 20 July: 12.5 µg/m³ Tanabe, 21 July: no reading Tanabe, 22 July: 18.8 µg/m³ Tanabe, 23 July: 28.2 µg/m³, 3.8× its usual 7.5 Tanabe, 24 July: 32.5 µg/m³, 4.2× its usual 7.7 Tanabe, 25 July: no reading Tanabe, 26 July: no reading Tanabe, 27 July: no reading Tanabe, 28 July: no reading Minato Minato, 18 July: 19.8 µg/m³ Minato, 19 July: 16.7 µg/m³ Minato, 20 July: 14.6 µg/m³ Minato, 21 July: 19.4 µg/m³ Minato, 22 July: 24.9 µg/m³ Minato, 23 July: 31.7 µg/m³, 3.4× its usual 9.2 Minato, 24 July: 25.9 µg/m³, 2.7× its usual 9.6 Minato, 25 July: 18.9 µg/m³ Minato, 26 July: 16.6 µg/m³ Minato, 27 July: 15.9 µg/m³ Minato, 28 July: 18.0 µg/m³ Izumisano Izumisano, 18 July: 18.6 µg/m³ Izumisano, 19 July: 15.1 µg/m³ Izumisano, 20 July: 14.4 µg/m³ Izumisano, 21 July: 19.8 µg/m³ Izumisano, 22 July: 24.1 µg/m³ Izumisano, 23 July: 31.3 µg/m³, 3.9× its usual 8.0 Izumisano, 24 July: 19.6 µg/m³ Izumisano, 25 July: 16.9 µg/m³ Izumisano, 26 July: 14.6 µg/m³ Izumisano, 27 July: 11.4 µg/m³ Izumisano, 28 July: 14.4 µg/m³ Kishiwada Kishiwada, 18 July: 19.5 µg/m³ Kishiwada, 19 July: 15.5 µg/m³ Kishiwada, 20 July: 14.8 µg/m³ Kishiwada, 21 July: 21.6 µg/m³ Kishiwada, 22 July: 24.5 µg/m³ Kishiwada, 23 July: 31.3 µg/m³, 3.5× its usual 8.9 Kishiwada, 24 July: 17.8 µg/m³ Kishiwada, 25 July: 15.3 µg/m³ Kishiwada, 26 July: 14.5 µg/m³ Kishiwada, 27 July: 11.5 µg/m³ Kishiwada, 28 July: 14.5 µg/m³ Hashimoto Hashimoto, 18 July: 22.2 µg/m³ Hashimoto, 19 July: 15.1 µg/m³ Hashimoto, 20 July: 13.8 µg/m³ Hashimoto, 21 July: 19.3 µg/m³ Hashimoto, 22 July: 23.6 µg/m³ Hashimoto, 23 July: 31.1 µg/m³, 3.8× its usual 8.1 Hashimoto, 24 July: 24.9 µg/m³ Hashimoto, 25 July: 16.4 µg/m³ Hashimoto, 26 July: 14.6 µg/m³ Hashimoto, 27 July: 12.8 µg/m³ Hashimoto, 28 July: 11.1 µg/m³ Izumi Izumi, 18 July: 20.2 µg/m³ Izumi, 19 July: 14.2 µg/m³ Izumi, 20 July: 13.9 µg/m³ Izumi, 21 July: 18.6 µg/m³ Izumi, 22 July: 23.1 µg/m³ Izumi, 23 July: 30.5 µg/m³, 3.8× its usual 8.0 Izumi, 24 July: 20.2 µg/m³ Izumi, 25 July: 14.5 µg/m³ Izumi, 26 July: 13.6 µg/m³ Izumi, 27 July: 10.4 µg/m³ Izumi, 28 July: 12.2 µg/m³ Sennan Sennan, 18 July: 17.4 µg/m³ Sennan, 19 July: 14.1 µg/m³ Sennan, 20 July: 13.6 µg/m³ Sennan, 21 July: 19.0 µg/m³ Sennan, 22 July: 22.0 µg/m³ Sennan, 23 July: 30.0 µg/m³, 3.9× its usual 7.6 Sennan, 24 July: 19.9 µg/m³ Sennan, 25 July: 14.8 µg/m³ Sennan, 26 July: 14.2 µg/m³ Sennan, 27 July: 11.2 µg/m³ Sennan, 28 July: 14.3 µg/m³ Odawara Odawara, 18 July: 5.3 µg/m³ Odawara, 19 July: 4.4 µg/m³ Odawara, 20 July: 8.8 µg/m³ Odawara, 21 July: 15.8 µg/m³ Odawara, 22 July: 23.9 µg/m³ Odawara, 23 July: 30.0 µg/m³, 3.4× its usual 8.9 Odawara, 24 July: 17.4 µg/m³ Odawara, 25 July: 22.0 µg/m³ Odawara, 26 July: 8.4 µg/m³ Odawara, 27 July: 11.1 µg/m³ Odawara, 28 July: 8.6 µg/m³ Kashiwara Kashiwara, 18 July: 23.1 µg/m³ Kashiwara, 19 July: 15.0 µg/m³ Kashiwara, 20 July: 14.6 µg/m³ Kashiwara, 21 July: 19.0 µg/m³ Kashiwara, 22 July: 24.2 µg/m³ Kashiwara, 23 July: 30.0 µg/m³, 3.1× its usual 9.6 Kashiwara, 24 July: 19.9 µg/m³ Kashiwara, 25 July: 15.4 µg/m³ Kashiwara, 26 July: 15.6 µg/m³ Kashiwara, 27 July: 10.2 µg/m³ Kashiwara, 28 July: 11.0 µg/m³ Minami-Alps Minami-Alps, 18 July: 10.2 µg/m³ Minami-Alps, 19 July: 7.3 µg/m³ Minami-Alps, 20 July: 11.5 µg/m³ Minami-Alps, 21 July: 15.2 µg/m³ Minami-Alps, 22 July: 21.0 µg/m³ Minami-Alps, 23 July: 29.9 µg/m³, 3.3× its usual 9.1 Minami-Alps, 24 July: 27.6 µg/m³, 3.0× its usual 9.1 Minami-Alps, 25 July: no reading Minami-Alps, 26 July: no reading Minami-Alps, 27 July: 9.5 µg/m³ Minami-Alps, 28 July: 7.5 µg/m³ Kakegawa Kakegawa, 18 July: 8.7 µg/m³ Kakegawa, 19 July: 3.3 µg/m³ Kakegawa, 20 July: 8.3 µg/m³ Kakegawa, 21 July: 15.0 µg/m³ Kakegawa, 22 July: 22.0 µg/m³ Kakegawa, 23 July: 27.5 µg/m³, 3.4× its usual 8.2 Kakegawa, 24 July: 29.1 µg/m³, 3.6× its usual 8.1 Kakegawa, 25 July: 22.8 µg/m³ Kakegawa, 26 July: 13.8 µg/m³ Kakegawa, 27 July: 10.3 µg/m³ Kakegawa, 28 July: 7.6 µg/m³ Susaki Susaki, 18 July: 23.7 µg/m³ Susaki, 19 July: 17.9 µg/m³ Susaki, 20 July: 17.1 µg/m³ Susaki, 21 July: 14.4 µg/m³ Susaki, 22 July: 19.9 µg/m³ Susaki, 23 July: 23.7 µg/m³ Susaki, 24 July: 29.7 µg/m³, 3.3× its usual 9.1 Susaki, 25 July: 34.5 µg/m³, 3.8× its usual 9.1 Susaki, 26 July: 30.2 µg/m³ Susaki, 27 July: 24.4 µg/m³ Susaki, 28 July: 18.9 µg/m³ Aki Aki, 18 July: 18.8 µg/m³ Aki, 19 July: 21.1 µg/m³ Aki, 20 July: 21.0 µg/m³ Aki, 21 July: 13.7 µg/m³ Aki, 22 July: 14.7 µg/m³ Aki, 23 July: 23.4 µg/m³ Aki, 24 July: 31.9 µg/m³, 3.8× its usual 8.5 Aki, 25 July: 30.0 µg/m³, 3.5× its usual 8.5 Aki, 26 July: 23.8 µg/m³ Aki, 27 July: 22.9 µg/m³ Aki, 28 July: 26.1 µg/m³ Kochi Kochi, 18 July: 20.0 µg/m³ Kochi, 19 July: 17.5 µg/m³ Kochi, 20 July: 17.8 µg/m³ Kochi, 21 July: 14.0 µg/m³ Kochi, 22 July: 17.7 µg/m³ Kochi, 23 July: 24.1 µg/m³ Kochi, 24 July: 29.9 µg/m³, 2.8× its usual 10.6 Kochi, 25 July: 29.0 µg/m³, 2.8× its usual 10.5 Kochi, 26 July: 24.5 µg/m³ Kochi, 27 July: 21.3 µg/m³ Kochi, 28 July: 23.6 µg/m³ Mooka Mooka, 18 July: 5.1 µg/m³ Mooka, 19 July: 6.6 µg/m³ Mooka, 20 July: 9.6 µg/m³ Mooka, 21 July: 16.8 µg/m³ Mooka, 22 July: 18.2 µg/m³ Mooka, 23 July: 17.0 µg/m³ Mooka, 24 July: 10.0 µg/m³ Mooka, 25 July: 39.1 µg/m³, 4.6× its usual 8.5 Mooka, 26 July: 7.6 µg/m³ Mooka, 27 July: no reading Mooka, 28 July: no reading 18 Jul 20 22 24 26 28 The 60 cities with the highest readings of 172, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more. Good 0–50
Moderate 51–100
Sensitive groups 101–150
Unhealthy 151–200
Very unhealthy 201–300
Hazardous 301+
Every city it reached
City Days Highest Usual Above usual
Sumoto Hyōgo, Japan 2 23 July 6.7 5.1× Kobayashi Miyazaki, Japan 3 25 July 6.8 4.9× Mooka Tochigi, Japan 1 25 July 8.5 4.6× Nishiwaki Hyōgo, Japan 2 22 July 7.4 4.5× Beppu Oita, Japan 2 21 July 8.2 4.4× Ōita Oita, Japan 1 21 July 8.1 4.3× Mie Oita, Japan 3 21 July 7.5 4.3× Yamaguchi Yamaguchi, Japan 1 21 July 7.2 4.3× Shido Kagawa, Japan 2 22 July 8.7 4.2× Tanabe Wakayama, Japan 2 24 July 7.7 4.2× Yono Osaka, Japan 1 22 July 7.1 4.1× Miyakonojō Miyazaki, Japan 1 25 July 7.1 4.1× Shingū Wakayama, Japan 3 23 July 8.3 4.0× Takinomiya Kagawa, Japan 1 22 July 7.8 4.0× Takamatsu Kagawa, Japan 1 22 July 7.7 4.0× Takatsuki Osaka, Japan 1 22 July 7.2 4.0× Ono Hyōgo, Japan 2 22 July 9.0 3.9× Izumisano Osaka, Japan 1 23 July 8.0 3.9× Toyohashi Aichi, Japan 2 24 July 7.9 3.9× Sennan Osaka, Japan 1 23 July 7.6 3.9× Kumano Mie, Japan 2 23 July 7.3 3.9× Shinshiro Aichi, Japan 2 22 July 7.2 3.9× Inuyama Aichi, Japan 1 22 July 6.7 3.9× Kariya Hyōgo, Japan 3 22 July 9.7 3.8× Susaki Kochi, Japan 2 25 July 9.1 3.8× Kainan Wakayama, Japan 2 23 July 8.7 3.8× Tsuyama Okayama, Japan 2 22 July 8.6 3.8× Aki Kochi, Japan 2 24 July 8.5 3.8× Hashimoto Wakayama, Japan 1 23 July 8.1 3.8× Izumi Osaka, Japan 1 23 July 8.0 3.8× Shima Mie, Japan 1 23 July 7.5 3.8× Shinagawa Ehime, Japan 1 23 July 6.7 3.8× Tatsuno Hyōgo, Japan 3 22 July 9.9 3.7× Aioi Hyōgo, Japan 3 22 July 9.8 3.7× Hiragi Kagawa, Japan 2 22 July 8.6 3.7× Kakogawachō-honmachi Hyōgo, Japan 2 22 July 9.6 3.6× Tamano Okayama, Japan 2 22 July 9.0 3.6× Tsurusaki Oita, Japan 1 21 July 8.4 3.6× Takarazuka Hyōgo, Japan 1 22 July 8.1 3.6× Kakegawa Shizuoka, Japan 2 24 July 8.1 3.6× Shimada Shizuoka, Japan 2 24 July 7.9 3.6× Ise Mie, Japan 2 23 July 7.8 3.6× Hamakita Shizuoka, Japan 1 24 July 7.6 3.6× Fujieda Shizuoka, Japan 3 25 July 7.6 3.6× Iwade Wakayama, Japan 3 23 July 9.7 3.5× Higashinozoe Hyōgo, Japan 3 22 July 9.3 3.5× Kishiwada Osaka, Japan 1 23 July 8.9 3.5× Kameoka Kyoto, Japan 1 22 July 8.7 3.5× Takahashi Okayama, Japan 1 22 July 8.4 3.5× Takanabe Miyazaki, Japan 4 23 July 8.3 3.5× Toba Mie, Japan 2 23 July 8.2 3.5× Kobe Hyōgo, Japan 2 23 July 8.0 3.5× Tondabayashichō Osaka, Japan 1 23 July 8.0 3.5× Tokushima Tokushima, Japan 2 23 July 7.8 3.5× Kitahama Shiga, Japan 1 22 July 7.7 3.5× Hekinan Aichi, Japan 1 22 July 7.8 3.5× Ikaruga Hyōgo, Japan 3 22 July 9.5 3.4× Minato Wakayama, Japan 2 23 July 9.2 3.4× Odawara Kanagawa, Japan 1 23 July 8.9 3.4× Himeji Hyōgo, Japan 2 22 July 8.8 3.4× Akashi Hyōgo, Japan 2 22 July 8.7 3.4× Gamagōri Aichi, Japan 2 22 July 8.5 3.4× Ueno-ebisumachi Mie, Japan 1 22 July 8.3 3.4× Takayama Gifu, Japan 1 22 July 8.2 3.4× Sayama Osaka, Japan 1 23 July 8.2 3.4× Kōtari Kyoto, Japan 1 22 July 8.3 3.4× Hōfu Yamaguchi, Japan 1 21 July 7.9 3.4× Hamamatsu Shizuoka, Japan 1 24 July 7.9 3.4× Tsu Mie, Japan 1 22 July 7.7 3.4× Nisshin Aichi, Japan 1 22 July 7.7 3.4× Yae Hiroshima, Japan 1 22 July 7.8 3.4× Kusatsu Shiga, Japan 1 22 July 7.8 3.4× Kikugawa Shizuoka, Japan 2 24 July 7.6 3.4× Fuefuki Yamanashi, Japan 1 23 July 7.6 3.4× Bizen Okayama, Japan 3 22 July 11.0 3.3× Fukuroi Shizuoka, Japan 4 23 July 10.0 3.3× Okayama Okayama, Japan 2 22 July 9.5 3.3× Nobeoka Miyazaki, Japan 5 22 July 9.1 3.3× Minami-Alps Yamanashi, Japan 2 23 July 9.1 3.3× Sakai Osaka, Japan 1 23 July 8.8 3.3× Kyoto Kyoto, Japan 1 22 July 8.7 3.3× Kosai Shizuoka, Japan 1 24 July 8.5 3.3× Inabe Mie, Japan 1 22 July 8.6 3.3× Toyooka Hyōgo, Japan 1 21 July 8.3 3.3× Suzuka Mie, Japan 1 22 July 8.4 3.3× Iga Mie, Japan 1 22 July 8.3 3.3× Toyonaka Osaka, Japan 1 22 July 8.1 3.3× Shimoda Shizuoka, Japan 2 25 July 8.0 3.3× Owase Mie, Japan 2 24 July 7.9 3.3× Gobō Wakayama, Japan 2 23 July 7.8 3.3× Numazu Shizuoka, Japan 2 25 July 7.9 3.3× Kyōtango Kyoto, Japan 1 21 July 7.7 3.3× Ōtsu Shiga, Japan 1 22 July 7.7 3.3× Sakura Chiba, Japan 1 22 July 7.6 3.3× Zentsujichó Kagawa, Japan 1 22 July 9.9 3.2× Kamojimachō-jōgejima Tokushima, Japan 3 22 July 8.8 3.2× Isehara Kanagawa, Japan 1 23 July 8.7 3.2× Kashima-shi Ibaraki, Japan 1 22 July 8.6 3.2× Tokoname Aichi, Japan 1 22 July 8.4 3.2× Matsusaka Mie, Japan 1 22 July 8.5 3.2× Kizugawa Kyoto, Japan 1 22 July 8.4 3.2× Nankoku Kochi, Japan 1 25 July 8.2 3.2× Nabari Mie, Japan 1 22 July 8.1 3.2× Tottori-shi Tottori, Japan 1 21 July 10.3 3.1× Sandachō Hyōgo, Japan 2 22 July 10.0 3.1× Kashiwara Nara, Japan 1 23 July 9.6 3.1× Ayabe Kyoto, Japan 2 22 July 9.3 3.1× Hikone Shiga, Japan 2 22 July 9.3 3.1× Fukuchiyama Kyoto, Japan 2 22 July 9.1 3.1× Kashihara-shi Nara, Japan 1 23 July 9.0 3.1× Atami Shizuoka, Japan 1 23 July 9.1 3.1× Yoshinogawa Tokushima, Japan 3 23 July 9.1 3.1× Shūnan Yamaguchi, Japan 1 21 July 8.9 3.1× Takashima Shiga, Japan 1 22 July 8.7 3.1× Ino Kochi, Japan 1 24 July 8.8 3.1× Nantan Kyoto, Japan 2 21 July 8.5 3.1× Toyota Aichi, Japan 1 22 July 8.6 3.1× Izunokuni Shizuoka, Japan 1 23 July 8.5 3.1× Tsukumiura Oita, Japan 1 21 July 8.5 3.1× Hiratsuka Kanagawa, Japan 1 23 July 8.5 3.1× Saikū Mie, Japan 2 23 July 8.3 3.1× Jōyō Kyoto, Japan 1 22 July 8.1 3.1× Nakamura Kochi, Japan 1 25 July 8.3 3.1× Nishinomiya Hyōgo, Japan 2 22 July 8.1 3.1× Nishio Aichi, Japan 1 22 July 8.1 3.1× Nagahama Shiga, Japan 2 22 July 10.0 3.0× Higashihiroshima Hiroshima, Japan 1 22 July 9.8 3.0× Kurashiki Okayama, Japan 2 22 July 9.6 3.0× Chigasaki Kanagawa, Japan 1 23 July 9.5 3.0× Hadano Kanagawa, Japan 1 23 July 9.4 3.0× Youkaichi Shiga, Japan 1 22 July 9.0 3.0× Fukui-shi Fukui, Japan 2 21 July 8.8 3.0× Kariya Aichi, Japan 1 22 July 8.6 3.0× Fuji Shizuoka, Japan 1 25 July 8.5 3.0× Nagano Nagano, Japan 1 22 July 8.5 3.0× Yao Osaka, Japan 1 23 July 8.4 3.0× Ikedachō Tokushima, Japan 4 22 July 10.3 2.9× Marugame Kagawa, Japan 1 22 July 10.1 2.9× Hyūga Miyazaki, Japan 5 22 July 9.6 2.9× Fujinomiya Shizuoka, Japan 2 23 July 9.7 2.9× Shin’ichi Hiroshima, Japan 1 22 July 9.5 2.9× Narutochō-mitsuishi Tokushima, Japan 2 22 July 9.2 2.9× Miyazu Kyoto, Japan 1 21 July 8.8 2.9× Kuwana Mie, Japan 1 22 July 8.7 2.9× Amagasaki Hyōgo, Japan 1 23 July 8.7 2.9× Tōkai Aichi, Japan 1 22 July 8.8 2.9× Gotemba Shizuoka, Japan 2 23 July 11.4 2.8× Mima Tokushima, Japan 4 22 July 11.1 2.8× Kochi Kochi, Japan 2 24 July 10.6 2.8× Kamisu Ibaraki, Japan 1 22 July 10.6 2.8× Gion Hiroshima, Japan 2 22 July 9.8 2.8× Toyama Toyama, Japan 1 22 July 9.5 2.8× Anan Tokushima, Japan 2 23 July 9.7 2.8× Ikoma Nara, Japan 1 22 July 9.3 2.8× Okazaki Aichi, Japan 1 22 July 9.3 2.8× Ōtake Hiroshima, Japan 1 21 July 9.3 2.8× Higashiosaka Osaka, Japan 1 23 July 9.2 2.8× Yufu Oita, Japan 1 21 July 10.5 2.7× Fukuyama Hiroshima, Japan 1 22 July 10.2 2.7× Sōja Okayama, Japan 1 22 July 9.8 2.7× Hachiōji Tokyo, Japan 2 22 July 10.5 2.6× Owariasahi Aichi, Japan 1 22 July 10.4 2.6× Kan’onjichō Kagawa, Japan 1 22 July 10.0 2.6× Tsuchiura Ibaraki, Japan 1 22 July 11.8 2.5× Fujiyoshida Yamanashi, Japan 1 23 July 10.2 2.5× Iwata Shizuoka, Japan 1 23 July 10.0 2.5× Minawa Kanagawa, Japan 1 23 July 10.7 2.4× Shikokuchūō Ehime, Japan 1 22 July 10.5 2.4× Aihara Kanagawa, Japan 1 23 July 11.5 2.3× Kofu Yamanashi, Japan 2 23 July 12.8 2.2× Kasaoka Okayama, Japan 1 22 July 12.1 2.1× Nagai Yamagata, Japan 1 22 July 11.9 2.1×
Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.
Against other episodes in Japan
Number 7 of 39 episodes in Japan since our records began, by cities reached.
Japan and South Korea, June and July 2025 508 Japan and South Korea, April 2024 499 Japan and South Korea, March 2025 454 Japan and South Korea, March 2026 305 Japan and South Korea, January 2025 274 Japan and South Korea, February and March 2025 192 Japan, 21 to 25 July 2026 172 Japan, November 2023 131 Japan, 4 to 5 August 2025 126 Japan, January and February 2025 110 Japan, May 2025 103 Japan, March 2025 92 Bars: cities reached; colour: the level of the episode's highest daily reading. All 39 .
Use this page SmogRank, Japan, 21 to 25 July 2026: 172 cities with PM2.5 at twice their usual or more, 21 to 25 July 2026, smogrank.com/episodes/2026-07-21-japan (accessed 4 October 2026).
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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms .
An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes . Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.
