SmogRank / Episodes / Japan
Japan, 16 July 2026
For 1 day, on 16 July 2026, 41 cities in Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Hokota, Ibaraki, Japan: 33.6 µg/m³ on 16 July, about 4.1× its usual 8.1.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 41 in 1 country
Days 1 16 July 2026
Worst day 16 July 41 cities counted
Furthest above usual 4.1× Hokota
Day by day
Play 16 July 41 cities at twice their usual or more
Sayama Iruma Hannō Tokorozawa Sakado Kawagoe Yokota Morohongō Igusa Higashimurayama Akishima Higashikurume Kodaira Niiza Higashi-Matsuyama Ōme Fuchū Asaka Ogawamachi Kōnosu Ageo Saitama Kumagaya Gyōda Kawaguchi Kazo Yorii Hanyū Tokyo Kukichūō Chichibu Minawa Menuma Kasukabe Minamirinkan Uenohara Koshigaya Yamato Sōka Tatebayashi Kodamachō-kodamaminami Atsugi Honjō Sakai-nakajima Ōta Koga Ashikaga Noda Ebina Misato, Saitama Sano Ōtsuki Matsudo Bandō Fujisawa Kiryū Kamakura Kashiwa Oyama Kamagaya Minamiashigara Tochigi Tomioka Yokosuka Narashino Kimitsu Kurihama Yamanashi Fujiyoshida Chikusei Shibukawa Miura Kanuma Inzai Sodegaura Kaminokawa Fuefuki Yotsukaidō Ajiki Mooka Numata Susono Utsunomiya Kofu Imaichi Nakanojō Narita Ishioka Yachimata Ōami Saku Minamibōsō Tateyama Fuji Tōgane Yaita Nasukarasuyama Sawara Yokoshiba Sōsa Katsuura Ōhara Omigawa Hitachiomiya Ueda Nasushiobara Suwa Minamiuonuma Suzaka Shizuoka Okaya Nagano Hitachi Chikuma Matsumoto Shirakawa Shimada Iida Kitaibaraki Nagaoka Aizu-Wakamatsu Kikugawa Jōetsu Kakegawa Kōriyama Hamakita Shirone Iwata Itoigawa Maki Niitsu-honchō Kameda-honchō Hamamatsu Shibata Niigata Shinshiro Takayama Fukushima Gero Yonezawa Nyūzen Kosai Uozu Namerikawa Toki Toyohashi Nagai Tajimi Toyama Minami-Sōma Toyota Seto Kani Gamagōri Sado Minokamo Okazaki Tahara Imizu Nisshin Owariasahi Sōma Shiroishi Anjō Inuyama Sekimachi Kakuda Chiryū Takaoka Nishio Yamagata Tonami Kariya Kakamigahara Nagoya Hekinan Himimachi Tōkai Handa Ichinomiya Minamichita Oyabe Iwanuma Gifu Ama Nanao Tokoname Natori-shi Kaminoma Motosu Mizuho Hashima Tsubata Hakui Sendai Ōgaki Kaizu Kuwana Anamizu Ibi Nonoichi Kanazawa Toba Matsutō Ono Tagajō-shi Yokkaichi Inabe Suzuka Shima Komatsu Ise Saikū Tsu Kaga Kameyama Matsusaka Nagahama Fukui-shi Hikone Sabae Mikuni Youkaichi Tsuruga Kōka Ōmihachiman Takashima Iga Ueno-ebisumachi Kusatsu Nabari Kitahama Ōtsu Owase Obama Uji Kizugawa Jōyō Kyoto Sugai Nara-shi Tenri Kōtari Kumano Yawata Kashihara-shi Hōryūji Ikoma Hirakata Kashiwara Kameoka Takatsuki Nantan Yao Higashiosaka Yono Shingū Habikino Tondabayashichō Sayama Osaka Kawachi-Nagano Toyonaka Hashimoto Maizuru Sakai Amagasaki Takarazuka Ayabe Izumi Miyazu Nishinomiya Kishiwada Sandachō Kinokawa Fukuchiyama Izumisano Kyōtango Kobe Iwade Sennan Nishiwaki Kainan Akashi Minato Tanabe Ono Toyooka Higashinozoe Gobō Kakogawachō-honmachi Sumoto Himeji Ikaruga Tatsuno Aioi Narutochō-mitsuishi Anan Kariya Tokushima Fujinomiya Aihara Hadano Hachiōji Iwaki Gotemba Noborito Minami-Alps Machida Fukuroi Tsuchiura Azamino Mito Atami Ayase Hiratsuka Yachiyo Yokohama Kasama Chigasaki Isehara Odawara Shimo-tsuma Kamisu Shimoda Fujieda Naka Inashiki Kisarazu Urayasu Toride Numazu Jōsō Chiba Kashima-shi Sakura Hitachi-Naka Mobara Ichihara Izunokuni Hokota 13 Jul 14 15 16 17 18 19 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
Hokota Hokota, 13 July: 24.5 µg/m³ Hokota, 14 July: 15.2 µg/m³ Hokota, 15 July: 19.5 µg/m³ Hokota, 16 July: 33.6 µg/m³, 4.1× its usual 8.1 Hokota, 17 July: 20.2 µg/m³ Hokota, 18 July: 3.6 µg/m³ Hokota, 19 July: 3.7 µg/m³ Tsuchiura Tsuchiura, 13 July: 21.3 µg/m³ Tsuchiura, 14 July: 16.0 µg/m³ Tsuchiura, 15 July: 23.7 µg/m³ Tsuchiura, 16 July: 32.6 µg/m³, 2.7× its usual 12.0 Tsuchiura, 17 July: 24.5 µg/m³ Tsuchiura, 18 July: 6.7 µg/m³ Tsuchiura, 19 July: 8.0 µg/m³ Ayase Ayase, 13 July: 18.4 µg/m³ Ayase, 14 July: 19.3 µg/m³ Ayase, 15 July: 18.1 µg/m³ Ayase, 16 July: 31.5 µg/m³, 2.8× its usual 11.4 Ayase, 17 July: 16.6 µg/m³ Ayase, 18 July: 5.5 µg/m³ Ayase, 19 July: 4.4 µg/m³ Kamisu Kamisu, 13 July: 19.2 µg/m³ Kamisu, 14 July: 16.6 µg/m³ Kamisu, 15 July: 19.4 µg/m³ Kamisu, 16 July: 31.3 µg/m³, 3.0× its usual 10.3 Kamisu, 17 July: 17.2 µg/m³ Kamisu, 18 July: 7.0 µg/m³ Kamisu, 19 July: 4.2 µg/m³ Izunokuni Izunokuni, 13 July: 16.0 µg/m³ Izunokuni, 14 July: 16.4 µg/m³ Izunokuni, 15 July: 17.3 µg/m³ Izunokuni, 16 July: 30.7 µg/m³, 3.6× its usual 8.6 Izunokuni, 17 July: 22.9 µg/m³ Izunokuni, 18 July: 2.9 µg/m³ Izunokuni, 19 July: 1.5 µg/m³ Gotemba Gotemba, 13 July: 15.8 µg/m³ Gotemba, 14 July: 15.5 µg/m³ Gotemba, 15 July: 17.8 µg/m³ Gotemba, 16 July: 30.1 µg/m³, 2.6× its usual 11.4 Gotemba, 17 July: 22.3 µg/m³ Gotemba, 18 July: 7.7 µg/m³ Gotemba, 19 July: 2.8 µg/m³ Naka Naka, 13 July: 21.0 µg/m³ Naka, 14 July: 16.8 µg/m³ Naka, 15 July: 18.1 µg/m³ Naka, 16 July: 30.0 µg/m³, 3.1× its usual 9.8 Naka, 17 July: 20.9 µg/m³ Naka, 18 July: 6.0 µg/m³ Naka, 19 July: 5.5 µg/m³ Kashima-shi Kashima-shi, 13 July: 18.5 µg/m³ Kashima-shi, 14 July: 16.3 µg/m³ Kashima-shi, 15 July: 19.7 µg/m³ Kashima-shi, 16 July: 29.2 µg/m³, 3.3× its usual 8.8 Kashima-shi, 17 July: 13.2 µg/m³ Kashima-shi, 18 July: 7.6 µg/m³ Kashima-shi, 19 July: 5.8 µg/m³ Iwaki Iwaki, 13 July: 11.5 µg/m³ Iwaki, 14 July: 14.1 µg/m³ Iwaki, 15 July: 18.1 µg/m³ Iwaki, 16 July: 29.2 µg/m³, 2.6× its usual 11.3 Iwaki, 17 July: 12.5 µg/m³ Iwaki, 18 July: 4.1 µg/m³ Iwaki, 19 July: 5.8 µg/m³ Hachiōji Hachiōji, 13 July: 16.8 µg/m³ Hachiōji, 14 July: 17.5 µg/m³ Hachiōji, 15 July: 21.6 µg/m³ Hachiōji, 16 July: 28.8 µg/m³, 2.6× its usual 10.9 Hachiōji, 17 July: 21.4 µg/m³ Hachiōji, 18 July: 7.3 µg/m³ Hachiōji, 19 July: 4.5 µg/m³ Chigasaki Chigasaki, 13 July: 15.9 µg/m³ Chigasaki, 14 July: 17.8 µg/m³ Chigasaki, 15 July: 16.4 µg/m³ Chigasaki, 16 July: 28.6 µg/m³, 2.9× its usual 9.9 Chigasaki, 17 July: 19.7 µg/m³ Chigasaki, 18 July: 5.3 µg/m³ Chigasaki, 19 July: 3.3 µg/m³ Chiba Chiba, 13 July: 16.3 µg/m³ Chiba, 14 July: 15.6 µg/m³ Chiba, 15 July: 16.8 µg/m³ Chiba, 16 July: 28.5 µg/m³, 3.3× its usual 8.6 Chiba, 17 July: 17.5 µg/m³ Chiba, 18 July: 4.0 µg/m³ Chiba, 19 July: 5.0 µg/m³ Shimo-tsuma Shimo-tsuma, 13 July: 18.8 µg/m³ Shimo-tsuma, 14 July: 16.8 µg/m³ Shimo-tsuma, 15 July: 18.9 µg/m³ Shimo-tsuma, 16 July: 28.4 µg/m³, 3.0× its usual 9.6 Shimo-tsuma, 17 July: 19.4 µg/m³ Shimo-tsuma, 18 July: 5.5 µg/m³ Shimo-tsuma, 19 July: 5.3 µg/m³ Aihara Aihara, 13 July: 17.1 µg/m³ Aihara, 14 July: 16.5 µg/m³ Aihara, 15 July: 19.0 µg/m³ Aihara, 16 July: 28.3 µg/m³, 2.4× its usual 12.0 Aihara, 17 July: 21.1 µg/m³ Aihara, 18 July: 7.6 µg/m³ Aihara, 19 July: 4.8 µg/m³ Jōsō Jōsō, 13 July: 20.8 µg/m³ Jōsō, 14 July: 18.3 µg/m³ Jōsō, 15 July: 18.0 µg/m³ Jōsō, 16 July: 27.6 µg/m³, 3.3× its usual 8.3 Jōsō, 17 July: 19.6 µg/m³ Jōsō, 18 July: 3.4 µg/m³ Jōsō, 19 July: 5.2 µg/m³ Ichihara Ichihara, 13 July: 17.1 µg/m³ Ichihara, 14 July: 14.1 µg/m³ Ichihara, 15 July: 15.4 µg/m³ Ichihara, 16 July: 27.4 µg/m³, 3.6× its usual 7.6 Ichihara, 17 July: 16.8 µg/m³ Ichihara, 18 July: 4.2 µg/m³ Ichihara, 19 July: 3.9 µg/m³ Numazu Numazu, 13 July: 17.7 µg/m³ Numazu, 14 July: 15.3 µg/m³ Numazu, 15 July: 17.7 µg/m³ Numazu, 16 July: 27.1 µg/m³, 3.3× its usual 8.3 Numazu, 17 July: 24.4 µg/m³ Numazu, 18 July: 8.5 µg/m³ Numazu, 19 July: 4.3 µg/m³ Hitachi-Naka Hitachi-Naka, 13 July: 15.0 µg/m³ Hitachi-Naka, 14 July: 14.6 µg/m³ Hitachi-Naka, 15 July: 19.6 µg/m³ Hitachi-Naka, 16 July: 27.0 µg/m³, 3.4× its usual 8.0 Hitachi-Naka, 17 July: 11.8 µg/m³ Hitachi-Naka, 18 July: 4.1 µg/m³ Hitachi-Naka, 19 July: 4.5 µg/m³ Kasama Kasama, 13 July: 16.7 µg/m³ Kasama, 14 July: no reading Kasama, 15 July: 18.7 µg/m³ Kasama, 16 July: 27.0 µg/m³, 2.9× its usual 9.4 Kasama, 17 July: 16.5 µg/m³ Kasama, 18 July: 5.1 µg/m³ Kasama, 19 July: 6.7 µg/m³ Sakura Sakura, 13 July: 17.7 µg/m³ Sakura, 14 July: 17.5 µg/m³ Sakura, 15 July: 16.8 µg/m³ Sakura, 16 July: 26.9 µg/m³, 3.4× its usual 7.9 Sakura, 17 July: 14.7 µg/m³ Sakura, 18 July: 3.8 µg/m³ Sakura, 19 July: 5.7 µg/m³ Odawara Odawara, 13 July: 15.3 µg/m³ Odawara, 14 July: 17.5 µg/m³ Odawara, 15 July: 16.7 µg/m³ Odawara, 16 July: 26.7 µg/m³, 3.0× its usual 9.0 Odawara, 17 July: 21.4 µg/m³ Odawara, 18 July: 5.3 µg/m³ Odawara, 19 July: 4.4 µg/m³ Fukuroi Fukuroi, 13 July: 14.6 µg/m³ Fukuroi, 14 July: 25.5 µg/m³ Fukuroi, 15 July: 16.8 µg/m³ Fukuroi, 16 July: 26.7 µg/m³, 2.7× its usual 9.9 Fukuroi, 17 July: 21.3 µg/m³ Fukuroi, 18 July: 6.2 µg/m³ Fukuroi, 19 July: 6.9 µg/m³ Isehara Isehara, 13 July: 17.5 µg/m³ Isehara, 14 July: 16.5 µg/m³ Isehara, 15 July: 17.4 µg/m³ Isehara, 16 July: 26.5 µg/m³, 3.0× its usual 8.7 Isehara, 17 July: 20.4 µg/m³ Isehara, 18 July: 5.3 µg/m³ Isehara, 19 July: 4.0 µg/m³ Atami Atami, 13 July: 14.7 µg/m³ Atami, 14 July: 17.3 µg/m³ Atami, 15 July: 16.9 µg/m³ Atami, 16 July: 26.5 µg/m³, 2.8× its usual 9.3 Atami, 17 July: 21.0 µg/m³ Atami, 18 July: 7.0 µg/m³ Atami, 19 July: 4.0 µg/m³ Mito Mito, 13 July: 15.2 µg/m³ Mito, 14 July: 15.0 µg/m³ Mito, 15 July: 18.6 µg/m³ Mito, 16 July: 26.5 µg/m³, 2.8× its usual 9.3 Mito, 17 July: 14.5 µg/m³ Mito, 18 July: 2.7 µg/m³ Mito, 19 July: 5.8 µg/m³ Yokohama Yokohama, 13 July: 16.7 µg/m³ Yokohama, 14 July: 15.1 µg/m³ Yokohama, 15 July: 13.7 µg/m³ Yokohama, 16 July: 26.4 µg/m³, 2.9× its usual 9.0 Yokohama, 17 July: 17.2 µg/m³ Yokohama, 18 July: 5.6 µg/m³ Yokohama, 19 July: 3.6 µg/m³ Urayasu Urayasu, 13 July: 16.9 µg/m³ Urayasu, 14 July: 13.5 µg/m³ Urayasu, 15 July: 13.5 µg/m³ Urayasu, 16 July: 26.2 µg/m³, 3.2× its usual 8.3 Urayasu, 17 July: 15.7 µg/m³ Urayasu, 18 July: 5.1 µg/m³ Urayasu, 19 July: 3.3 µg/m³ Kisarazu Kisarazu, 13 July: 16.0 µg/m³ Kisarazu, 14 July: 11.9 µg/m³ Kisarazu, 15 July: 13.4 µg/m³ Kisarazu, 16 July: 26.1 µg/m³, 3.2× its usual 8.1 Kisarazu, 17 July: 17.0 µg/m³ Kisarazu, 18 July: 3.8 µg/m³ Kisarazu, 19 July: 2.5 µg/m³ Machida Machida, 13 July: 16.1 µg/m³ Machida, 14 July: 16.1 µg/m³ Machida, 15 July: 15.4 µg/m³ Machida, 16 July: 26.0 µg/m³, 2.7× its usual 9.5 Machida, 17 July: 15.5 µg/m³ Machida, 18 July: 5.8 µg/m³ Machida, 19 July: 4.4 µg/m³ Toride Toride, 13 July: 14.8 µg/m³ Toride, 14 July: 14.5 µg/m³ Toride, 15 July: 14.8 µg/m³ Toride, 16 July: 25.7 µg/m³, 3.3× its usual 7.7 Toride, 17 July: 15.8 µg/m³ Toride, 18 July: 3.8 µg/m³ Toride, 19 July: 4.1 µg/m³ Yachiyo Yachiyo, 13 July: 14.9 µg/m³ Yachiyo, 14 July: 15.6 µg/m³ Yachiyo, 15 July: 16.1 µg/m³ Yachiyo, 16 July: 25.7 µg/m³, 2.9× its usual 9.0 Yachiyo, 17 July: 15.7 µg/m³ Yachiyo, 18 July: 3.6 µg/m³ Yachiyo, 19 July: 5.0 µg/m³ Minami-Alps Minami-Alps, 13 July: no reading Minami-Alps, 14 July: no reading Minami-Alps, 15 July: 21.9 µg/m³ Minami-Alps, 16 July: 25.5 µg/m³, 2.7× its usual 9.5 Minami-Alps, 17 July: 25.7 µg/m³ Minami-Alps, 18 July: 10.2 µg/m³ Minami-Alps, 19 July: 7.3 µg/m³ Mobara Mobara, 13 July: 15.1 µg/m³ Mobara, 14 July: 13.0 µg/m³ Mobara, 15 July: 14.9 µg/m³ Mobara, 16 July: 25.4 µg/m³, 3.5× its usual 7.2 Mobara, 17 July: 12.6 µg/m³ Mobara, 18 July: 2.3 µg/m³ Mobara, 19 July: 3.6 µg/m³ Hadano Hadano, 13 July: 15.0 µg/m³ Hadano, 14 July: 15.5 µg/m³ Hadano, 15 July: 16.8 µg/m³ Hadano, 16 July: 25.3 µg/m³, 2.6× its usual 9.6 Hadano, 17 July: 20.6 µg/m³ Hadano, 18 July: 5.8 µg/m³ Hadano, 19 July: 4.3 µg/m³ Fujinomiya Fujinomiya, 13 July: 18.7 µg/m³ Fujinomiya, 14 July: 16.0 µg/m³ Fujinomiya, 15 July: 15.8 µg/m³ Fujinomiya, 16 July: 25.3 µg/m³, 2.4× its usual 10.4 Fujinomiya, 17 July: 23.3 µg/m³ Fujinomiya, 18 July: 6.7 µg/m³ Fujinomiya, 19 July: 3.2 µg/m³ Hiratsuka Hiratsuka, 13 July: no reading Hiratsuka, 14 July: no reading Hiratsuka, 15 July: 16.0 µg/m³ Hiratsuka, 16 July: 25.2 µg/m³, 2.9× its usual 8.7 Hiratsuka, 17 July: 19.3 µg/m³ Hiratsuka, 18 July: 4.8 µg/m³ Hiratsuka, 19 July: 3.1 µg/m³ Azamino Azamino, 13 July: 15.7 µg/m³ Azamino, 14 July: 15.0 µg/m³ Azamino, 15 July: 14.0 µg/m³ Azamino, 16 July: 25.2 µg/m³, 2.8× its usual 9.1 Azamino, 17 July: 14.9 µg/m³ Azamino, 18 July: 5.6 µg/m³ Azamino, 19 July: 3.3 µg/m³ Inashiki Inashiki, 13 July: 17.1 µg/m³ Inashiki, 14 July: 16.1 µg/m³ Inashiki, 15 July: 17.0 µg/m³ Inashiki, 16 July: 25.1 µg/m³, 3.2× its usual 7.9 Inashiki, 17 July: 13.8 µg/m³ Inashiki, 18 July: 4.1 µg/m³ Inashiki, 19 July: 4.9 µg/m³ Fujieda Fujieda, 13 July: 18.7 µg/m³ Fujieda, 14 July: 14.8 µg/m³ Fujieda, 15 July: 18.0 µg/m³ Fujieda, 16 July: 25.1 µg/m³, 3.1× its usual 8.1 Fujieda, 17 July: 20.5 µg/m³ Fujieda, 18 July: 5.0 µg/m³ Fujieda, 19 July: 2.4 µg/m³ Shimoda Shimoda, 13 July: 15.5 µg/m³ Shimoda, 14 July: 15.3 µg/m³ Shimoda, 15 July: 15.8 µg/m³ Shimoda, 16 July: 25.0 µg/m³, 3.1× its usual 8.1 Shimoda, 17 July: 20.9 µg/m³ Shimoda, 18 July: 5.5 µg/m³ Shimoda, 19 July: 3.1 µg/m³ Noborito Noborito, 13 July: 15.7 µg/m³ Noborito, 14 July: 14.7 µg/m³ Noborito, 15 July: 14.5 µg/m³ Noborito, 16 July: 25.0 µg/m³, 2.7× its usual 9.4 Noborito, 17 July: 14.7 µg/m³ Noborito, 18 July: 5.4 µg/m³ Noborito, 19 July: 3.6 µg/m³ 13 Jul 14 15 16 17 18 19 Every counted city, 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
Hokota Ibaraki, Japan 1 16 July 8.1 4.1× Izunokuni Shizuoka, Japan 1 16 July 8.6 3.6× Ichihara Chiba, Japan 1 16 July 7.6 3.6× Mobara Chiba, Japan 1 16 July 7.2 3.5× Hitachi-Naka Ibaraki, Japan 1 16 July 8.0 3.4× Sakura Chiba, Japan 1 16 July 7.9 3.4× Kashima-shi Ibaraki, Japan 1 16 July 8.8 3.3× Chiba Chiba, Japan 1 16 July 8.6 3.3× Jōsō Ibaraki, Japan 1 16 July 8.3 3.3× Numazu Shizuoka, Japan 1 16 July 8.3 3.3× Toride Ibaraki, Japan 1 16 July 7.7 3.3× Urayasu Chiba, Japan 1 16 July 8.3 3.2× Kisarazu Chiba, Japan 1 16 July 8.1 3.2× Inashiki Ibaraki, Japan 1 16 July 7.9 3.2× Naka Ibaraki, Japan 1 16 July 9.8 3.1× Fujieda Shizuoka, Japan 1 16 July 8.1 3.1× Shimoda Shizuoka, Japan 1 16 July 8.1 3.1× Kamisu Ibaraki, Japan 1 16 July 10.3 3.0× Shimo-tsuma Ibaraki, Japan 1 16 July 9.6 3.0× Odawara Kanagawa, Japan 1 16 July 9.0 3.0× Isehara Kanagawa, Japan 1 16 July 8.7 3.0× Chigasaki Kanagawa, Japan 1 16 July 9.9 2.9× Kasama Ibaraki, Japan 1 16 July 9.4 2.9× Yokohama Kanagawa, Japan 1 16 July 9.0 2.9× Yachiyo Chiba, Japan 1 16 July 9.0 2.9× Hiratsuka Kanagawa, Japan 1 16 July 8.7 2.9× Ayase Kanagawa, Japan 1 16 July 11.4 2.8× Atami Shizuoka, Japan 1 16 July 9.3 2.8× Mito Ibaraki, Japan 1 16 July 9.3 2.8× Azamino Kanagawa, Japan 1 16 July 9.1 2.8× Tsuchiura Ibaraki, Japan 1 16 July 12.0 2.7× Fukuroi Shizuoka, Japan 1 16 July 9.9 2.7× Machida Tokyo, Japan 1 16 July 9.5 2.7× Minami-Alps Yamanashi, Japan 1 16 July 9.5 2.7× Noborito Kanagawa, Japan 1 16 July 9.4 2.7× Gotemba Shizuoka, Japan 1 16 July 11.4 2.6× Iwaki Fukushima, Japan 1 16 July 11.3 2.6× Hachiōji Tokyo, Japan 1 16 July 10.9 2.6× Hadano Kanagawa, Japan 1 16 July 9.6 2.6× Aihara Kanagawa, Japan 1 16 July 12.0 2.4× Fujinomiya Shizuoka, Japan 1 16 July 10.4 2.4×
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 20 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 Japan, 16 July 2026 41 Bars: cities reached; colour: the level of the episode's highest daily reading. All 39 .
Use this page SmogRank, Japan, 16 July 2026: 41 cities with PM2.5 at twice their usual or more, 16 July 2026, smogrank.com/episodes/2026-07-16-japan (accessed 4 October 2026).
Copy citation Download top 10 (PNG)
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.
