SmogRank / Episodes / Japan
Japan, 14 to 15 February 2026
For 2 days, from 14 to 15 February 2026, 51 cities in Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Ōdate, Akita, Japan: 40.1 µg/m³ on 14 February, about 6.7× its usual 6.0.
No cause named We have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached 51 in 1 country
Days 2 14 to 15 February 2026
Worst day 15 February 41 cities counted
Furthest above usual 6.7× Ōdate
Day by day
Play 15 February 41 cities at twice their usual or more
Anamizu Nanao Nyūzen Himimachi Uozu Imizu Namerikawa Takaoka Toyama Hakui Itoigawa Oyabe Tonami Tsubata Kanazawa Jōetsu Nonoichi Matsutō Nagano Chikuma Takayama Komatsu Suzaka Sado Matsumoto Kaga Ueda Okaya Gero Ono Suwa Mikuni Nagaoka Minamiuonuma Fukui-shi Maki Saku Ina Nakanojō Sabae Shirone Niigata Minokamo Sekimachi Niitsu-honchō Kameda-honchō Iida Numata Shibukawa Motosu Kani Kakamigahara Tomioka Ibi Gifu Inuyama Toki Tajimi Mizuho Tsuruga Ōgaki Ichinomiya Hashima Minami-Alps Seto Kofu Shibata Owariasahi Nagoya Nagahama Fuefuki Kodamachō-kodamaminami Ama Yamanashi Nisshin Honjō Kaizu Sakai-nakajima Toyota Chichibu Kiryū Takashima Yorii Hikone Inabe Tōkai Ōta Chiryū Kuwana Kariya Obama Ogawamachi Anjō Okazaki Menuma Ashikaga Ōtsuki Kumagaya Fujiyoshida Shinshiro Youkaichi Hekinan Morohongō Nishio Tokoname Ōmihachiman Imaichi Gyōda Gamagōri Tatebayashi Higashi-Matsuyama Ōme Fujinomiya Sano Uenohara Sakado Hannō Kitahama Hanyū Kaminoma Toyohashi Kōnosu Kanuma Hamakita Igusa Iruma Kōka Fuji Shizuoka Sayama Gotemba Kazo Kawagoe Tochigi Yokota Kusatsu Kosai Hachiōji Akishima Aizu-Wakamatsu Fujieda Minamichita Hamamatsu Kakegawa Maizuru Shimada Tokorozawa Aihara Iwata Tsu Ōtsu Higashimurayama Yaita Ageo Susono Miyazu Kukichūō Utsunomiya Minamiashigara Minawa Kodaira Niiza Higashikurume Kyoto Numazu Fuchū Kikugawa Hadano Kyōtango Asaka Kaminokawa Iga Nasushiobara Odawara Isehara Kasukabe Machida Nantan Atsugi Uji Ayabe Minamirinkan Izunokuni Kōtari Kameoka Noborito Saikū Yamato Atami Tsuruoka Jōyō Ayase Kawaguchi Azamino Yonezawa Hiratsuka Ebina Ise Koshigaya Yawata Chigasaki Tokyo Fukuchiyama Kizugawa Nabari Sugai Nasukarasuyama Takatsuki Fujisawa Yono Hirakata Shirakawa Toyooka Misato, Saitama Nara-shi Shima Yokohama Kamakura Matsudo Ikoma Kashiwa Tenri Kōriyama Toyonaka Hōryūji Urayasu Kasama Higashiosaka Shimoda Kamagaya Sagae Takarazuka Yokosuka Osaka Sandachō Yao Kashihara-shi Amagasaki Yamagata Fukushima Miura Hitachiomiya Kurihama Narashino Habikino Nishinomiya Kashiwara Inzai Nishiwaki Yachiyo Tondabayashichō Kimitsu Sakai Sayama Higashine Kisarazu Ajiki Mito Chiba Kawachi-Nagano Kobe Inashiki Ichihara Yotsukaidō Sodegaura Izumi Sakura Ono Hitachi-Naka Shiroishi Narita Kishiwada Hashimoto Owase Hitachi Hokota Yachimata Izumisano Tateyama Kitaibaraki Tottori-shi Minamibōsō Sawara Kakuda Ōami Kinokawa Himeji Tōgane Sennan Mobara Kumano Iwaki Yokoshiba Iwade Kashima-shi Ikaruga Iwanuma Omigawa Sōsa Sōma Akita Tatsuno Kamisu Natori-shi Sendai Minami-Sōma Yoshioka Aioi Katsuura Minato Ōhara Kainan Yokote Shingū Tagajō-shi Kariya Ōsaki Kurayoshi Matsushima Bizen Tsuyama Kurihara Gobō Wakuya Higashimatsushima Tanabe Narutochō-mitsuishi Tome Ichinoseki Ishinomaki Tokushima Okayama Ōshū Hanamaki Tamano Yonago Kamojimachō-jōgejima Sōja Sakaiminato Yoshinogawa Yasugichō Takahashi Niimi Mima Morioka Takinomiya Takizawa Kesennuma Matsue Ikedachō Unnan Shin’ichi Izumo Kamaishi Miyoshi Mihara Aki Miyako Ōdachō-ōda Nankoku Takehara Kuji Kochi Higashihiroshima Ino Yae Gōtsuchō Susaki Gion Kure Hiroshima Shinagawa Matsuyama Iyo Ōtake Iwakuni Yanai Yawatahama Saijō Shido Asakuchi Niihama Shikokuchūō Imabari Kasaoka Fukuyama Takamatsu Onomichi Sōka Anan Kakogawachō-honmachi Tahara Kurashiki Saitama Marugame Kameyama Higashinozoe Kan’onjichō Yokkaichi Tsuchiura Oyama Matsusaka Noda Shimo-tsuma Naka Zentsujichó Chikusei Hiragi Aomori Akashi Ishioka Handa Nagai Jōsō Suzuka Sumoto Toride Bandō Shinjō Toba Koga Yurihonjō Hirosaki Oga Mooka Shonai Hachinohe Noshiro Ōdate 11 Feb 12 13 14 15 16 17 18 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
Ōdate Ōdate, 11 February: 26.3 µg/m³ Ōdate, 12 February: 9.5 µg/m³ Ōdate, 13 February: 11.3 µg/m³ Ōdate, 14 February: 40.1 µg/m³, 6.7× its usual 6.0 Ōdate, 15 February: 33.3 µg/m³ Ōdate, 16 February: 11.2 µg/m³ Ōdate, 17 February: 9.7 µg/m³ Ōdate, 18 February: 9.4 µg/m³ Noshiro Noshiro, 11 February: 21.3 µg/m³ Noshiro, 12 February: 8.1 µg/m³ Noshiro, 13 February: 8.6 µg/m³ Noshiro, 14 February: 31.8 µg/m³, 5.7× its usual 5.6 Noshiro, 15 February: 23.0 µg/m³ Noshiro, 16 February: 9.1 µg/m³ Noshiro, 17 February: 6.6 µg/m³ Noshiro, 18 February: 8.9 µg/m³ Yurihonjō Yurihonjō, 11 February: 20.3 µg/m³ Yurihonjō, 12 February: 11.3 µg/m³ Yurihonjō, 13 February: 8.1 µg/m³ Yurihonjō, 14 February: 31.1 µg/m³, 5.1× its usual 6.1 Yurihonjō, 15 February: 20.6 µg/m³ Yurihonjō, 16 February: 11.0 µg/m³ Yurihonjō, 17 February: 12.5 µg/m³ Yurihonjō, 18 February: 9.9 µg/m³ Aomori Aomori, 11 February: 19.4 µg/m³ Aomori, 12 February: 7.3 µg/m³ Aomori, 13 February: 6.9 µg/m³ Aomori, 14 February: 29.0 µg/m³, 4.3× its usual 6.7 Aomori, 15 February: 20.2 µg/m³ Aomori, 16 February: 8.7 µg/m³ Aomori, 17 February: 5.7 µg/m³ Aomori, 18 February: 6.4 µg/m³ Hachinohe Hachinohe, 11 February: 17.7 µg/m³ Hachinohe, 12 February: 6.7 µg/m³ Hachinohe, 13 February: 6.6 µg/m³ Hachinohe, 14 February: 28.7 µg/m³, 5.7× its usual 5.0 Hachinohe, 15 February: 23.9 µg/m³ Hachinohe, 16 February: 8.8 µg/m³ Hachinohe, 17 February: 7.1 µg/m³ Hachinohe, 18 February: 7.6 µg/m³ Oga Oga, 11 February: 22.2 µg/m³ Oga, 12 February: 10.2 µg/m³ Oga, 13 February: 8.7 µg/m³ Oga, 14 February: 28.4 µg/m³, 5.3× its usual 5.4 Oga, 15 February: 24.0 µg/m³ Oga, 16 February: 10.6 µg/m³ Oga, 17 February: 9.1 µg/m³ Oga, 18 February: 9.6 µg/m³ Nagai Nagai, 11 February: 11.4 µg/m³ Nagai, 12 February: 9.6 µg/m³ Nagai, 13 February: 10.1 µg/m³ Nagai, 14 February: 28.0 µg/m³, 4.5× its usual 6.2 Nagai, 15 February: 20.1 µg/m³ Nagai, 16 February: 16.5 µg/m³ Nagai, 17 February: 5.6 µg/m³ Nagai, 18 February: 8.9 µg/m³ Shonai Shonai, 11 February: 17.3 µg/m³ Shonai, 12 February: 7.8 µg/m³ Shonai, 13 February: 6.6 µg/m³ Shonai, 14 February: 27.5 µg/m³, 5.5× its usual 4.3 Shonai, 15 February: 17.5 µg/m³ Shonai, 16 February: 9.9 µg/m³ Shonai, 17 February: 7.2 µg/m³ Shonai, 18 February: 8.6 µg/m³ Hirosaki Hirosaki, 11 February: 18.0 µg/m³ Hirosaki, 12 February: 6.9 µg/m³ Hirosaki, 13 February: 8.0 µg/m³ Hirosaki, 14 February: 26.0 µg/m³, 5.2× its usual 4.9 Hirosaki, 15 February: 21.0 µg/m³ Hirosaki, 16 February: 9.2 µg/m³ Hirosaki, 17 February: 6.8 µg/m³ Hirosaki, 18 February: 7.0 µg/m³ Shinjō Shinjō, 11 February: 14.7 µg/m³ Shinjō, 12 February: 7.1 µg/m³ Shinjō, 13 February: 7.5 µg/m³ Shinjō, 14 February: 26.0 µg/m³, 5.0× its usual 5.2 Shinjō, 15 February: 16.0 µg/m³ Shinjō, 16 February: 9.7 µg/m³ Shinjō, 17 February: 8.5 µg/m³ Shinjō, 18 February: 10.5 µg/m³ Akashi Akashi, 11 February: 16.4 µg/m³ Akashi, 12 February: 20.7 µg/m³ Akashi, 13 February: 21.0 µg/m³ Akashi, 14 February: 26.4 µg/m³ Akashi, 15 February: 34.0 µg/m³, 4.3× its usual 7.9 Akashi, 16 February: 20.1 µg/m³ Akashi, 17 February: 6.6 µg/m³ Akashi, 18 February: 10.7 µg/m³ Shimo-tsuma Shimo-tsuma, 11 February: 28.9 µg/m³ Shimo-tsuma, 12 February: 10.2 µg/m³ Shimo-tsuma, 13 February: 12.4 µg/m³ Shimo-tsuma, 14 February: 23.0 µg/m³ Shimo-tsuma, 15 February: 33.9 µg/m³, 3.9× its usual 8.6 Shimo-tsuma, 16 February: 23.8 µg/m³ Shimo-tsuma, 17 February: 5.7 µg/m³ Shimo-tsuma, 18 February: 11.5 µg/m³ Kan’onjichō Kan’onjichō, 11 February: 16.6 µg/m³ Kan’onjichō, 12 February: 14.9 µg/m³ Kan’onjichō, 13 February: 20.6 µg/m³ Kan’onjichō, 14 February: 25.8 µg/m³ Kan’onjichō, 15 February: 32.5 µg/m³, 3.6× its usual 9.1 Kan’onjichō, 16 February: 20.6 µg/m³ Kan’onjichō, 17 February: 6.5 µg/m³ Kan’onjichō, 18 February: 13.4 µg/m³ Chikusei Chikusei, 11 February: 20.3 µg/m³ Chikusei, 12 February: 12.7 µg/m³ Chikusei, 13 February: 14.6 µg/m³ Chikusei, 14 February: 20.8 µg/m³ Chikusei, 15 February: 31.8 µg/m³, 4.1× its usual 7.8 Chikusei, 16 February: 21.3 µg/m³ Chikusei, 17 February: 5.7 µg/m³ Chikusei, 18 February: 12.0 µg/m³ Higashinozoe Higashinozoe, 11 February: 17.1 µg/m³ Higashinozoe, 12 February: 22.8 µg/m³ Higashinozoe, 13 February: 23.6 µg/m³ Higashinozoe, 14 February: 27.6 µg/m³ Higashinozoe, 15 February: 31.7 µg/m³, 3.6× its usual 8.9 Higashinozoe, 16 February: 21.7 µg/m³ Higashinozoe, 17 February: 6.6 µg/m³ Higashinozoe, 18 February: 10.9 µg/m³ Suzuka Suzuka, 11 February: 13.2 µg/m³ Suzuka, 12 February: 17.0 µg/m³ Suzuka, 13 February: 17.5 µg/m³ Suzuka, 14 February: 26.2 µg/m³ Suzuka, 15 February: 31.2 µg/m³, 4.5× its usual 6.9 Suzuka, 16 February: 17.8 µg/m³ Suzuka, 17 February: 5.6 µg/m³ Suzuka, 18 February: 6.4 µg/m³ Jōsō Jōsō, 11 February: 28.4 µg/m³ Jōsō, 12 February: 9.8 µg/m³ Jōsō, 13 February: 14.1 µg/m³ Jōsō, 14 February: 21.7 µg/m³ Jōsō, 15 February: 31.0 µg/m³, 4.5× its usual 6.9 Jōsō, 16 February: 24.7 µg/m³ Jōsō, 17 February: 5.5 µg/m³ Jōsō, 18 February: 10.6 µg/m³ Tsuchiura Tsuchiura, 11 February: 29.4 µg/m³ Tsuchiura, 12 February: 17.4 µg/m³ Tsuchiura, 13 February: 13.1 µg/m³ Tsuchiura, 14 February: 22.1 µg/m³ Tsuchiura, 15 February: 31.0 µg/m³, 3.7× its usual 8.4 Tsuchiura, 16 February: 25.2 µg/m³ Tsuchiura, 17 February: 6.6 µg/m³ Tsuchiura, 18 February: no reading Bandō Bandō, 11 February: 14.3 µg/m³ Bandō, 12 February: 7.3 µg/m³ Bandō, 13 February: 11.5 µg/m³ Bandō, 14 February: 17.2 µg/m³ Bandō, 15 February: 30.3 µg/m³, 4.9× its usual 6.2 Bandō, 16 February: 14.4 µg/m³ Bandō, 17 February: 6.2 µg/m³ Bandō, 18 February: 9.3 µg/m³ Oyama Oyama, 11 February: 18.9 µg/m³ Oyama, 12 February: 10.8 µg/m³ Oyama, 13 February: 13.4 µg/m³ Oyama, 14 February: 19.9 µg/m³ Oyama, 15 February: 30.3 µg/m³, 3.8× its usual 7.9 Oyama, 16 February: 18.8 µg/m³ Oyama, 17 February: 6.6 µg/m³ Oyama, 18 February: 12.3 µg/m³ Onomichi Onomichi, 11 February: 21.4 µg/m³ Onomichi, 12 February: 19.4 µg/m³ Onomichi, 13 February: 18.7 µg/m³ Onomichi, 14 February: 27.5 µg/m³ Onomichi, 15 February: 29.8 µg/m³, 3.3× its usual 9.0 Onomichi, 16 February: 18.1 µg/m³ Onomichi, 17 February: 10.7 µg/m³ Onomichi, 18 February: 14.1 µg/m³ Fukuyama Fukuyama, 11 February: 18.6 µg/m³ Fukuyama, 12 February: 16.7 µg/m³ Fukuyama, 13 February: 16.6 µg/m³ Fukuyama, 14 February: 28.1 µg/m³ Fukuyama, 15 February: 29.7 µg/m³, 3.2× its usual 9.4 Fukuyama, 16 February: 17.5 µg/m³ Fukuyama, 17 February: 10.7 µg/m³ Fukuyama, 18 February: 11.9 µg/m³ Kurashiki Kurashiki, 11 February: 16.5 µg/m³ Kurashiki, 12 February: 16.7 µg/m³ Kurashiki, 13 February: 19.8 µg/m³ Kurashiki, 14 February: 24.1 µg/m³ Kurashiki, 15 February: 29.3 µg/m³, 3.5× its usual 8.4 Kurashiki, 16 February: 18.9 µg/m³ Kurashiki, 17 February: 9.5 µg/m³ Kurashiki, 18 February: 12.0 µg/m³ Mooka Mooka, 11 February: 15.5 µg/m³ Mooka, 12 February: 7.4 µg/m³ Mooka, 13 February: 9.5 µg/m³ Mooka, 14 February: 17.9 µg/m³ Mooka, 15 February: 28.8 µg/m³, 5.4× its usual 5.3 Mooka, 16 February: 17.5 µg/m³ Mooka, 17 February: 4.1 µg/m³ Mooka, 18 February: 9.2 µg/m³ Koga Koga, 11 February: 14.4 µg/m³ Koga, 12 February: 5.5 µg/m³ Koga, 13 February: 11.4 µg/m³ Koga, 14 February: 17.7 µg/m³ Koga, 15 February: 28.5 µg/m³, 5.1× its usual 5.6 Koga, 16 February: 15.1 µg/m³ Koga, 17 February: 5.0 µg/m³ Koga, 18 February: 8.8 µg/m³ Ishioka Ishioka, 11 February: 16.5 µg/m³ Ishioka, 12 February: 10.4 µg/m³ Ishioka, 13 February: 11.4 µg/m³ Ishioka, 14 February: 23.8 µg/m³ Ishioka, 15 February: 28.3 µg/m³, 4.4× its usual 6.4 Ishioka, 16 February: 16.0 µg/m³ Ishioka, 17 February: 5.7 µg/m³ Ishioka, 18 February: 11.3 µg/m³ Takamatsu Takamatsu, 11 February: 19.7 µg/m³ Takamatsu, 12 February: 19.3 µg/m³ Takamatsu, 13 February: 19.0 µg/m³ Takamatsu, 14 February: 20.7 µg/m³ Takamatsu, 15 February: 28.2 µg/m³, 3.3× its usual 8.5 Takamatsu, 16 February: 25.5 µg/m³ Takamatsu, 17 February: 7.6 µg/m³ Takamatsu, 18 February: 12.8 µg/m³ Shikokuchūō Shikokuchūō, 11 February: 16.6 µg/m³ Shikokuchūō, 12 February: 14.3 µg/m³ Shikokuchūō, 13 February: 14.3 µg/m³ Shikokuchūō, 14 February: 17.3 µg/m³ Shikokuchūō, 15 February: 27.8 µg/m³, 3.0× its usual 9.4 Shikokuchūō, 16 February: 20.0 µg/m³ Shikokuchūō, 17 February: 7.7 µg/m³ Shikokuchūō, 18 February: 9.8 µg/m³ Tahara Tahara, 11 February: 20.1 µg/m³ Tahara, 12 February: 18.2 µg/m³ Tahara, 13 February: 22.4 µg/m³ Tahara, 14 February: 23.2 µg/m³ Tahara, 15 February: 27.6 µg/m³, 3.5× its usual 8.0 Tahara, 16 February: 22.1 µg/m³ Tahara, 17 February: 8.7 µg/m³ Tahara, 18 February: 11.6 µg/m³ Handa Handa, 11 February: 11.9 µg/m³ Handa, 12 February: 14.8 µg/m³ Handa, 13 February: 17.0 µg/m³ Handa, 14 February: 24.2 µg/m³ Handa, 15 February: 27.5 µg/m³, 4.5× its usual 6.1 Handa, 16 February: 15.2 µg/m³ Handa, 17 February: 6.8 µg/m³ Handa, 18 February: 7.0 µg/m³ Niihama Niihama, 11 February: 15.2 µg/m³ Niihama, 12 February: 12.5 µg/m³ Niihama, 13 February: 12.0 µg/m³ Niihama, 14 February: 17.4 µg/m³ Niihama, 15 February: 27.5 µg/m³, 3.0× its usual 9.3 Niihama, 16 February: 15.8 µg/m³ Niihama, 17 February: 8.4 µg/m³ Niihama, 18 February: 9.2 µg/m³ Sumoto Sumoto, 11 February: 15.4 µg/m³ Sumoto, 12 February: 17.5 µg/m³ Sumoto, 13 February: 17.0 µg/m³ Sumoto, 14 February: 22.4 µg/m³ Sumoto, 15 February: 27.3 µg/m³, 4.8× its usual 5.7 Sumoto, 16 February: 24.2 µg/m³ Sumoto, 17 February: 5.4 µg/m³ Sumoto, 18 February: 8.0 µg/m³ Zentsujichó Zentsujichó, 11 February: 13.2 µg/m³ Zentsujichó, 12 February: 15.3 µg/m³ Zentsujichó, 13 February: 14.6 µg/m³ Zentsujichó, 14 February: 20.5 µg/m³ Zentsujichó, 15 February: 27.2 µg/m³, 4.1× its usual 6.6 Zentsujichó, 16 February: 22.2 µg/m³ Zentsujichó, 17 February: 6.3 µg/m³ Zentsujichó, 18 February: 9.3 µg/m³ Imabari Imabari, 11 February: 14.5 µg/m³ Imabari, 12 February: 14.0 µg/m³ Imabari, 13 February: 14.1 µg/m³ Imabari, 14 February: 24.6 µg/m³ Imabari, 15 February: 27.2 µg/m³, 3.1× its usual 8.7 Imabari, 16 February: 16.1 µg/m³ Imabari, 17 February: 7.6 µg/m³ Imabari, 18 February: 9.1 µg/m³ Toride Toride, 11 February: 27.6 µg/m³ Toride, 12 February: 9.8 µg/m³ Toride, 13 February: 13.9 µg/m³ Toride, 14 February: 19.6 µg/m³ Toride, 15 February: 27.1 µg/m³, 4.9× its usual 5.5 Toride, 16 February: 22.5 µg/m³ Toride, 17 February: 5.5 µg/m³ Toride, 18 February: 11.5 µg/m³ Hiragi Hiragi, 11 February: 14.5 µg/m³ Hiragi, 12 February: 15.5 µg/m³ Hiragi, 13 February: 12.5 µg/m³ Hiragi, 14 February: 17.8 µg/m³ Hiragi, 15 February: 27.1 µg/m³, 4.2× its usual 6.5 Hiragi, 16 February: 18.5 µg/m³ Hiragi, 17 February: 5.8 µg/m³ Hiragi, 18 February: 8.2 µg/m³ Noda Noda, 11 February: 21.3 µg/m³ Noda, 12 February: 9.5 µg/m³ Noda, 13 February: 16.0 µg/m³ Noda, 14 February: 20.6 µg/m³ Noda, 15 February: 27.0 µg/m³, 3.9× its usual 6.9 Noda, 16 February: 20.1 µg/m³ Noda, 17 February: 7.1 µg/m³ Noda, 18 February: 12.7 µg/m³ Saijō Saijō, 11 February: 15.4 µg/m³ Saijō, 12 February: 13.8 µg/m³ Saijō, 13 February: 13.6 µg/m³ Saijō, 14 February: 21.7 µg/m³ Saijō, 15 February: 26.9 µg/m³, 2.7× its usual 9.8 Saijō, 16 February: 17.6 µg/m³ Saijō, 17 February: 9.7 µg/m³ Saijō, 18 February: 9.7 µg/m³ Kasaoka Kasaoka, 11 February: 10.8 µg/m³ Kasaoka, 12 February: no reading Kasaoka, 13 February: no reading Kasaoka, 14 February: 28.2 µg/m³ Kasaoka, 15 February: 26.8 µg/m³, 3.2× its usual 8.5 Kasaoka, 16 February: 14.2 µg/m³ Kasaoka, 17 February: 7.7 µg/m³ Kasaoka, 18 February: 9.1 µg/m³ Naka Naka, 11 February: 29.0 µg/m³ Naka, 12 February: 13.8 µg/m³ Naka, 13 February: 13.6 µg/m³ Naka, 14 February: 19.5 µg/m³ Naka, 15 February: 26.6 µg/m³, 4.0× its usual 6.6 Naka, 16 February: 23.0 µg/m³ Naka, 17 February: 5.6 µg/m³ Naka, 18 February: 11.0 µg/m³ Kakogawachō-honmachi Kakogawachō-honmachi, 11 February: 15.3 µg/m³ Kakogawachō-honmachi, 12 February: 19.3 µg/m³ Kakogawachō-honmachi, 13 February: 20.2 µg/m³ Kakogawachō-honmachi, 14 February: 25.9 µg/m³ Kakogawachō-honmachi, 15 February: 26.6 µg/m³, 3.5× its usual 7.6 Kakogawachō-honmachi, 16 February: 18.7 µg/m³ Kakogawachō-honmachi, 17 February: 6.9 µg/m³ Kakogawachō-honmachi, 18 February: 10.3 µg/m³ Asakuchi Asakuchi, 11 February: 16.0 µg/m³ Asakuchi, 12 February: 16.2 µg/m³ Asakuchi, 13 February: 16.5 µg/m³ Asakuchi, 14 February: 23.0 µg/m³ Asakuchi, 15 February: 26.4 µg/m³, 3.0× its usual 8.8 Asakuchi, 16 February: 17.0 µg/m³ Asakuchi, 17 February: 8.6 µg/m³ Asakuchi, 18 February: 11.5 µg/m³ Yokkaichi Yokkaichi, 11 February: 10.4 µg/m³ Yokkaichi, 12 February: 16.7 µg/m³ Yokkaichi, 13 February: 17.3 µg/m³ Yokkaichi, 14 February: 23.3 µg/m³ Yokkaichi, 15 February: 26.3 µg/m³, 3.7× its usual 7.2 Yokkaichi, 16 February: 18.9 µg/m³ Yokkaichi, 17 February: 6.6 µg/m³ Yokkaichi, 18 February: 8.3 µg/m³ Shido Shido, 11 February: 20.9 µg/m³ Shido, 12 February: 20.5 µg/m³ Shido, 13 February: 19.1 µg/m³ Shido, 14 February: 23.9 µg/m³ Shido, 15 February: 26.2 µg/m³, 3.0× its usual 8.7 Shido, 16 February: 25.7 µg/m³ Shido, 17 February: 7.5 µg/m³ Shido, 18 February: 11.9 µg/m³ Kameyama Kameyama, 11 February: 9.2 µg/m³ Kameyama, 12 February: 18.0 µg/m³ Kameyama, 13 February: 17.7 µg/m³ Kameyama, 14 February: 22.0 µg/m³ Kameyama, 15 February: 25.9 µg/m³, 3.6× its usual 7.1 Kameyama, 16 February: 18.8 µg/m³ Kameyama, 17 February: 5.0 µg/m³ Kameyama, 18 February: 7.9 µg/m³ Matsusaka Matsusaka, 11 February: 12.0 µg/m³ Matsusaka, 12 February: 15.6 µg/m³ Matsusaka, 13 February: 18.4 µg/m³ Matsusaka, 14 February: 21.2 µg/m³ Matsusaka, 15 February: 25.8 µg/m³, 3.9× its usual 6.7 Matsusaka, 16 February: 16.5 µg/m³ Matsusaka, 17 February: 6.1 µg/m³ Matsusaka, 18 February: 8.9 µg/m³ Marugame Marugame, 11 February: 14.3 µg/m³ Marugame, 12 February: 14.8 µg/m³ Marugame, 13 February: 14.3 µg/m³ Marugame, 14 February: 19.0 µg/m³ Marugame, 15 February: 25.6 µg/m³, 3.6× its usual 7.2 Marugame, 16 February: 20.5 µg/m³ Marugame, 17 February: 6.6 µg/m³ Marugame, 18 February: 10.9 µg/m³ Toba Toba, 11 February: 12.1 µg/m³ Toba, 12 February: 15.1 µg/m³ Toba, 13 February: 18.0 µg/m³ Toba, 14 February: 18.0 µg/m³ Toba, 15 February: 25.4 µg/m³, 5.1× its usual 4.8 Toba, 16 February: 17.6 µg/m³ Toba, 17 February: 4.6 µg/m³ Toba, 18 February: 7.3 µg/m³ Anan Anan, 11 February: 7.8 µg/m³ Anan, 12 February: 14.6 µg/m³ Anan, 13 February: 16.2 µg/m³ Anan, 14 February: 13.6 µg/m³ Anan, 15 February: 25.3 µg/m³, 3.5× its usual 7.2 Anan, 16 February: 20.7 µg/m³ Anan, 17 February: 4.5 µg/m³ Anan, 18 February: 9.7 µg/m³ Saitama Saitama, 11 February: 15.0 µg/m³ Saitama, 12 February: 9.1 µg/m³ Saitama, 13 February: 14.5 µg/m³ Saitama, 14 February: 18.5 µg/m³ Saitama, 15 February: 25.1 µg/m³, 3.6× its usual 7.0 Saitama, 16 February: 14.8 µg/m³ Saitama, 17 February: 7.1 µg/m³ Saitama, 18 February: 12.2 µg/m³ Sōka Sōka, 11 February: 19.7 µg/m³ Sōka, 12 February: 11.3 µg/m³ Sōka, 13 February: 14.8 µg/m³ Sōka, 14 February: 19.5 µg/m³ Sōka, 15 February: 25.0 µg/m³, 3.5× its usual 7.2 Sōka, 16 February: 16.9 µg/m³ Sōka, 17 February: 5.8 µg/m³ Sōka, 18 February: 12.7 µg/m³ 11 Feb 12 13 14 15 16 17 18 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
Ōdate Akita, Japan 1 14 February 6.0 6.7× Noshiro Akita, Japan 1 14 February 5.6 5.7× Hachinohe Aomori, Japan 1 14 February 5.0 5.7× Shonai Yamagata, Japan 1 14 February 4.3 5.5× Mooka Tochigi, Japan 1 15 February 5.3 5.4× Oga Akita, Japan 1 14 February 5.4 5.3× Hirosaki Aomori, Japan 1 14 February 4.9 5.2× Yurihonjō Akita, Japan 1 14 February 6.1 5.1× Koga Ibaraki, Japan 1 15 February 5.6 5.1× Toba Mie, Japan 1 15 February 4.8 5.1× Shinjō Yamagata, Japan 1 14 February 5.2 5.0× Bandō Ibaraki, Japan 1 15 February 6.2 4.9× Toride Ibaraki, Japan 1 15 February 5.5 4.9× Sumoto Hyōgo, Japan 1 15 February 5.7 4.8× Suzuka Mie, Japan 1 15 February 6.9 4.5× Jōsō Ibaraki, Japan 1 15 February 6.9 4.5× Nagai Yamagata, Japan 1 14 February 6.2 4.5× Handa Aichi, Japan 1 15 February 6.1 4.5× Ishioka Ibaraki, Japan 1 15 February 6.4 4.4× Akashi Hyōgo, Japan 1 15 February 7.9 4.3× Aomori Aomori, Japan 1 14 February 6.7 4.3× Hiragi Kagawa, Japan 1 15 February 6.5 4.2× Chikusei Ibaraki, Japan 1 15 February 7.8 4.1× Zentsujichó Kagawa, Japan 1 15 February 6.6 4.1× Naka Ibaraki, Japan 1 15 February 6.6 4.0× Shimo-tsuma Ibaraki, Japan 1 15 February 8.6 3.9× Noda Chiba, Japan 1 15 February 6.9 3.9× Matsusaka Mie, Japan 1 15 February 6.7 3.9× Oyama Tochigi, Japan 1 15 February 7.9 3.8× Tsuchiura Ibaraki, Japan 1 15 February 8.4 3.7× Yokkaichi Mie, Japan 1 15 February 7.2 3.7× Kan’onjichō Kagawa, Japan 1 15 February 9.1 3.6× Higashinozoe Hyōgo, Japan 1 15 February 8.9 3.6× Kameyama Mie, Japan 1 15 February 7.1 3.6× Marugame Kagawa, Japan 1 15 February 7.2 3.6× Saitama Saitama, Japan 1 15 February 7.0 3.6× Kurashiki Okayama, Japan 1 15 February 8.4 3.5× Tahara Aichi, Japan 1 15 February 8.0 3.5× Kakogawachō-honmachi Hyōgo, Japan 1 15 February 7.6 3.5× Anan Tokushima, Japan 1 15 February 7.2 3.5× Sōka Saitama, Japan 1 15 February 7.2 3.5× Onomichi Hiroshima, Japan 1 15 February 9.0 3.3× Takamatsu Kagawa, Japan 1 15 February 8.5 3.3× Fukuyama Hiroshima, Japan 1 15 February 9.4 3.2× Kasaoka Okayama, Japan 1 15 February 8.5 3.2× Imabari Ehime, Japan 1 15 February 8.7 3.1× Shikokuchūō Ehime, Japan 1 15 February 9.4 3.0× Niihama Ehime, Japan 1 15 February 9.3 3.0× Asakuchi Okayama, Japan 1 15 February 8.8 3.0× Shido Kagawa, Japan 1 15 February 8.7 3.0× Saijō Ehime, Japan 1 15 February 9.8 2.7×
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 17 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, 14 to 15 February 2026 51 Bars: cities reached; colour: the level of the episode's highest daily reading. All 39 .
Use this page SmogRank, Japan, 14 to 15 February 2026: 51 cities with PM2.5 at twice their usual or more, 14 to 15 February 2026, smogrank.com/episodes/2026-02-14-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.
