SmogRank / Episodes / Japan
Japan, June 2025
For 2 days, from 7 to 8 June 2025, 22 cities in Japan had PM2.5 at least twice their usual for the time of year. The worst reading was Yanagawa, Fukuoka, Japan: 34.9 µg/m³ on 7 June, about 5.8× 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 22 in 1 country
Days 2 7 to 8 June 2025
Worst day 8 June 17 cities counted
Furthest above usual 5.8× Yanagawa
Day by day
Play 8 June 17 cities at twice their usual or more
Narutochō-mitsuishi Tokushima Kamojimachō-jōgejima Sumoto Shido Yoshinogawa Hiragi Aioi Tatsuno Ikaruga Takamatsu Himeji Higashinozoe Kakogawachō-honmachi Akashi Tamano Takinomiya Ono Minato Arida Kainan Kobe Sennan Marugame Nishiwaki Zentsujichó Izumisano Iwade Gobō Ikedachō Kishiwada Sōja Sandachō Nishinomiya Kinokawa Izumi Kan’onjichō Takarazuka Asakuchi Tanba Amagasaki Sakai Osaka Toyonaka Sayama Tanabe Kawachi-Nagano Shikokuchūō Aki Habikino Tondabayashichō Hashimoto Higashiosaka Yao Fukuchiyama Yono Fukuyama Tottori-shi Ayabe Nankoku Takatsuki Hirakata Ikoma Toyooka Kameoka Hōryūji Niimi Kashiwara Kashihara-shi Shin’ichi Yawata Kochi Kurayoshi Niihama Kōtari Tenri Sugai Kyōtango Miyazu Maizuru Kizugawa Jōyō Ino Uji Kyoto Mihara Ōtsu Imabari Nabari Susaki Kusatsu Shingū Kitahama Yonago Takehara Ueno-ebisumachi Iga Kumano Obama Yasugichō Shinagawa Owase Miyoshi Kōka Ōmihachiman Sakaiminato Higashihiroshima Takashima Youkaichi Matsuyama Unnan Matsue Iyo Hikone Kure Kameyama Tsuruga Nagahama Matsusaka Tsu Yae Izumo Gion Hiroshima Saikū Nakamura Suzuka Yokkaichi Ise Inabe Ōdachō-ōda Kuwana Kaizu Uwajima Yawatahama Sabae Shima Ōgaki Toba Ōtake Iwakuni Ibi Hashima Mizuho Kaminoma Tokoname Gōtsuchō Fukui-shi Ama Yanai Ichinomiya Handa Mikuni Tōkai Gifu Minamichita Hamada Hekinan Nagoya Kariya Ono Kakamigahara Nishio Chiryū Hikari Inuyama Anjō Sekimachi Nisshin Owariasahi Kaga Kudamatsu Okazaki Masuda Seto Toyota Shūnan Minokamo Kani Gamagōri Tahara Tajimi Komatsu Toki Toyohashi Kunisaki Tsukumiura Matsutō Hōfu Saiki Usuki Kosai Nonoichi Shinshiro Tsurusaki Kanazawa Gero Yamaguchi Hagi Ōita Tsubata Hamamatsu Takayama Mie Oyabe Hamakita Tonami Ube Mine Nagato Yufu Onoda Nobeoka Fukuroi Takaoka Hyūga Buzen Iida Kakegawa Imizu Toyama Kanda Kikugawa Yukuhashi Shimonoseki Shimada Kitakyushu Ina Aso Takanabe Uozu Fujieda Tagawa Shintomi Nōgata Nakama Koga Okaya Shizuoka Matsumoto Iizuka Ukiha Ōzu Suwa Miyazaki Kikuchi Tanushimarumachi-toyoki Munakata Yame Mifune Yamaga Wakasugi Kotō Uekimachi-mōno Koga Minami-Alps Tosu Kumamoto Kurume Chikuma Fujinomiya Fukuoka Chikugo Tamana Uto Fuji Kofu Ueda Kobayashi Kanzakimachi-kanzaki Ōmuta Nagano Arao Hitoyoshi Honmachi Saku Yamanashi Saga Numazu Fujiyoshida Suzaka Shimoda Itoshima Susono Ōyanomachi-noboritate Izunokuni Gotemba Taku Atami Karatsu Minamata Takeo Minamiashigara Ureshinomachi-shimojuku Odawara Isahaya Izumi Tomioka Hondomachi-hondo Imarichō-kō Hadano Ōmura Chichibu Iki Nakanojō Obita Hiratsuka Ōme Nagasaki Togitsu Minawa Aihara Matsuura Shibukawa Kodamachō-kodamaminami Sasebo Atsugi Hachiōji Chigasaki Ebina Yorii Ayase Hannō Honjō Morohongō Ogawamachi Akishima Minamirinkan Fujisawa Yamato Saikai Yokota Iruma Numata Machida Sakai-nakajima Sayama Kamakura Sakado Fuchū Higashimurayama Kodaira Tokorozawa Miura Azamino Higashi-Matsuyama Higashikurume Kumagaya Noborito Igusa Kawagoe Menuma Ōta Kiryū Yokosuka Yokohama Niiza Gyōda Kurihama Kōnosu Asaka Ashikaga Hanyū Tokyo Ageo Tatebayashi Saitama Kazo Sano Kukichūō Pohang Imaichi Saijō Onomichi Ōtsuki Mima Kasaoka Kurashiki Bizen Nantan Maebaru-chūō Okayama Nakatsu Kariya Takahashi Hita Higashigō Beppu Kashima Anan Tsuyama Kasuga Ogōri Yanagawa 4 Jun 5 6 7 8 9 10 11 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
Hita Hita, 4 June: 13.7 µg/m³, 1.3× usual Hita, 5 June: 18.5 µg/m³, 1.8× usual Hita, 6 June: 26.1 µg/m³, 2.5× usual Hita, 7 June: 29.2 µg/m³, 2.8× usual Hita, 8 June: 27.4 µg/m³, 2.6× usual Hita, 9 June: 4.9 µg/m³, 0.5× usual Hita, 10 June: 6.6 µg/m³, 0.6× usual Hita, 11 June: 11.0 µg/m³, 1.1× usual Yanagawa Yanagawa, 4 June: 9.2 µg/m³, 1.5× usual Yanagawa, 5 June: 16.3 µg/m³, 2.7× usual Yanagawa, 6 June: 13.1 µg/m³, 2.2× usual Yanagawa, 7 June: 34.9 µg/m³, 5.8× usual Yanagawa, 8 June: 20.5 µg/m³, 3.4× usual Yanagawa, 9 June: 5.1 µg/m³, 0.9× usual Yanagawa, 10 June: 2.1 µg/m³, 0.4× usual Yanagawa, 11 June: 4.8 µg/m³, 0.8× usual Ogōri Ogōri, 4 June: 12.2 µg/m³, 1.6× usual Ogōri, 5 June: 14.8 µg/m³, 1.9× usual Ogōri, 6 June: 16.2 µg/m³, 2.1× usual Ogōri, 7 June: 28.5 µg/m³, 3.7× usual Ogōri, 8 June: 22.0 µg/m³, 2.9× usual Ogōri, 9 June: 5.4 µg/m³, 0.7× usual Ogōri, 10 June: 2.4 µg/m³, 0.3× usual Ogōri, 11 June: 8.7 µg/m³, 1.1× usual Nakatsu Nakatsu, 4 June: 14.5 µg/m³, 1.4× usual Nakatsu, 5 June: 14.7 µg/m³, 1.4× usual Nakatsu, 6 June: 22.0 µg/m³, 2.1× usual Nakatsu, 7 June: 26.8 µg/m³, 2.5× usual Nakatsu, 8 June: 28.2 µg/m³, 2.7× usual Nakatsu, 9 June: 8.7 µg/m³, 0.8× usual Nakatsu, 10 June: 8.1 µg/m³, 0.8× usual Nakatsu, 11 June: 11.4 µg/m³, 1.1× usual Higashigō Higashigō, 4 June: 12.9 µg/m³, 1.4× usual Higashigō, 5 June: 15.9 µg/m³, 1.8× usual Higashigō, 6 June: 15.1 µg/m³, 1.7× usual Higashigō, 7 June: 26.2 µg/m³, 2.9× usual Higashigō, 8 June: 23.7 µg/m³, 2.7× usual Higashigō, 9 June: 7.0 µg/m³, 0.8× usual Higashigō, 10 June: 2.9 µg/m³, 0.3× usual Higashigō, 11 June: 7.6 µg/m³, 0.9× usual Kasuga Kasuga, 4 June: 11.2 µg/m³, 1.5× usual Kasuga, 5 June: 11.5 µg/m³, 1.6× usual Kasuga, 6 June: 11.9 µg/m³, 1.6× usual Kasuga, 7 June: 26.1 µg/m³, 3.6× usual Kasuga, 8 June: 23.3 µg/m³, 3.2× usual Kasuga, 9 June: 7.1 µg/m³, 1.0× usual Kasuga, 10 June: 3.0 µg/m³, 0.4× usual Kasuga, 11 June: 8.4 µg/m³, 1.2× usual Kashima Kashima, 4 June: 10.0 µg/m³, 1.2× usual Kashima, 5 June: 12.4 µg/m³, 1.4× usual Kashima, 6 June: 13.6 µg/m³, 1.6× usual Kashima, 7 June: 25.5 µg/m³, 3.0× usual Kashima, 8 June: 19.8 µg/m³, 2.3× usual Kashima, 9 June: 6.1 µg/m³, 0.7× usual Kashima, 10 June: 3.3 µg/m³, 0.4× usual Kashima, 11 June: 7.3 µg/m³, 0.8× usual Tsuyama Tsuyama, 4 June: 7.8 µg/m³, 0.9× usual Tsuyama, 5 June: 11.7 µg/m³, 1.3× usual Tsuyama, 6 June: 16.5 µg/m³, 1.8× usual Tsuyama, 7 June: 18.3 µg/m³, 2.0× usual Tsuyama, 8 June: 31.9 µg/m³, 3.5× usual Tsuyama, 9 June: 19.5 µg/m³, 2.1× usual Tsuyama, 10 June: 4.8 µg/m³, 0.5× usual Tsuyama, 11 June: 9.9 µg/m³, 1.1× usual Anan Anan, 4 June: 15.0 µg/m³, 1.6× usual Anan, 5 June: 18.0 µg/m³, 2.0× usual Anan, 6 June: 18.1 µg/m³, 2.0× usual Anan, 7 June: 21.5 µg/m³, 2.4× usual Anan, 8 June: 30.7 µg/m³, 3.4× usual Anan, 9 June: 13.7 µg/m³, 1.5× usual Anan, 10 June: 10.7 µg/m³, 1.2× usual Anan, 11 June: 12.9 µg/m³, 1.4× usual Bizen Bizen, 4 June: 10.5 µg/m³, 0.9× usual Bizen, 5 June: 17.8 µg/m³, 1.5× usual Bizen, 6 June: 19.3 µg/m³, 1.7× usual Bizen, 7 June: 18.6 µg/m³, 1.6× usual Bizen, 8 June: 29.4 µg/m³, 2.5× usual Bizen, 9 June: 17.9 µg/m³, 1.5× usual Bizen, 10 June: 6.3 µg/m³, 0.5× usual Bizen, 11 June: 14.9 µg/m³, 1.3× usual Kasaoka Kasaoka, 4 June: 11.4 µg/m³, 1.0× usual Kasaoka, 5 June: 15.0 µg/m³, 1.3× usual Kasaoka, 6 June: 19.6 µg/m³, 1.7× usual Kasaoka, 7 June: 23.8 µg/m³, 2.0× usual Kasaoka, 8 June: 27.5 µg/m³, 2.4× usual Kasaoka, 9 June: 18.1 µg/m³, 1.5× usual Kasaoka, 10 June: 6.8 µg/m³, 0.6× usual Kasaoka, 11 June: 9.3 µg/m³, 0.8× usual Maebaru-chūō Maebaru-chūō, 4 June: 12.9 µg/m³, 1.3× usual Maebaru-chūō, 5 June: 12.1 µg/m³, 1.2× usual Maebaru-chūō, 6 June: 12.1 µg/m³, 1.2× usual Maebaru-chūō, 7 June: 20.4 µg/m³, 2.0× usual Maebaru-chūō, 8 June: 26.9 µg/m³, 2.7× usual Maebaru-chūō, 9 June: 13.7 µg/m³, 1.4× usual Maebaru-chūō, 10 June: 5.6 µg/m³, 0.6× usual Maebaru-chūō, 11 June: 11.5 µg/m³, 1.2× usual Ōtsuki Ōtsuki, 4 June: 14.0 µg/m³, 1.2× usual Ōtsuki, 5 June: 16.3 µg/m³, 1.4× usual Ōtsuki, 6 June: 21.3 µg/m³, 1.8× usual Ōtsuki, 7 June: 20.7 µg/m³, 1.8× usual Ōtsuki, 8 June: 26.4 µg/m³, 2.2× usual Ōtsuki, 9 June: 24.4 µg/m³, 2.1× usual Ōtsuki, 10 June: 16.1 µg/m³, 1.4× usual Ōtsuki, 11 June: 12.5 µg/m³, 1.1× usual Kurashiki Kurashiki, 4 June: 11.8 µg/m³, 1.1× usual Kurashiki, 5 June: 16.8 µg/m³, 1.5× usual Kurashiki, 6 June: 24.8 µg/m³, 2.3× usual Kurashiki, 7 June: 22.9 µg/m³, 2.1× usual Kurashiki, 8 June: 25.9 µg/m³, 2.4× usual Kurashiki, 9 June: 16.0 µg/m³, 1.5× usual Kurashiki, 10 June: 5.3 µg/m³, 0.5× usual Kurashiki, 11 June: 14.1 µg/m³, 1.3× usual Okayama Okayama, 4 June: 10.3 µg/m³, 1.1× usual Okayama, 5 June: 14.3 µg/m³, 1.5× usual Okayama, 6 June: 17.2 µg/m³, 1.8× usual Okayama, 7 June: 19.6 µg/m³, 2.1× usual Okayama, 8 June: 25.8 µg/m³, 2.7× usual Okayama, 9 June: 13.7 µg/m³, 1.4× usual Okayama, 10 June: 4.3 µg/m³, 0.5× usual Okayama, 11 June: 14.0 µg/m³, 1.5× usual Beppu Beppu, 4 June: 13.5 µg/m³, 1.6× usual Beppu, 5 June: 12.4 µg/m³, 1.4× usual Beppu, 6 June: 19.0 µg/m³, 2.2× usual Beppu, 7 June: 22.1 µg/m³, 2.5× usual Beppu, 8 June: 25.7 µg/m³, 3.0× usual Beppu, 9 June: 7.9 µg/m³, 0.9× usual Beppu, 10 June: 9.5 µg/m³, 1.1× usual Beppu, 11 June: 11.9 µg/m³, 1.4× usual Takahashi Takahashi, 4 June: 6.9 µg/m³, 0.7× usual Takahashi, 5 June: 12.2 µg/m³, 1.3× usual Takahashi, 6 June: 20.3 µg/m³, 2.2× usual Takahashi, 7 June: 22.9 µg/m³, 2.5× usual Takahashi, 8 June: 25.7 µg/m³, 2.8× usual Takahashi, 9 June: 17.2 µg/m³, 1.8× usual Takahashi, 10 June: 6.0 µg/m³, 0.6× usual Takahashi, 11 June: 9.6 µg/m³, 1.0× usual Nantan Nantan, 4 June: 9.3 µg/m³, 1.0× usual Nantan, 5 June: 12.1 µg/m³, 1.3× usual Nantan, 6 June: 12.0 µg/m³, 1.3× usual Nantan, 7 June: 15.5 µg/m³, 1.6× usual Nantan, 8 June: 25.7 µg/m³, 2.7× usual Nantan, 9 June: 15.2 µg/m³, 1.6× usual Nantan, 10 June: 2.8 µg/m³, 0.3× usual Nantan, 11 June: 7.6 µg/m³, 0.8× usual Mima Mima, 4 June: 11.7 µg/m³, 1.1× usual Mima, 5 June: 16.2 µg/m³, 1.5× usual Mima, 6 June: 17.2 µg/m³, 1.6× usual Mima, 7 June: 21.0 µg/m³, 2.0× usual Mima, 8 June: 25.7 µg/m³, 2.4× usual Mima, 9 June: 14.1 µg/m³, 1.3× usual Mima, 10 June: 7.0 µg/m³, 0.7× usual Mima, 11 June: 9.1 µg/m³, 0.9× usual Kariya Kariya, 4 June: 11.5 µg/m³, 1.3× usual Kariya, 5 June: 16.4 µg/m³, 1.8× usual Kariya, 6 June: 15.8 µg/m³, 1.7× usual Kariya, 7 June: 16.0 µg/m³, 1.8× usual Kariya, 8 June: 25.5 µg/m³, 2.8× usual Kariya, 9 June: 17.2 µg/m³, 1.9× usual Kariya, 10 June: 3.6 µg/m³, 0.4× usual Kariya, 11 June: 11.5 µg/m³, 1.3× usual Onomichi Onomichi, 4 June: 12.6 µg/m³, 1.1× usual Onomichi, 5 June: 16.4 µg/m³, 1.4× usual Onomichi, 6 June: no reading Onomichi, 7 June: 22.0 µg/m³, 1.9× usual Onomichi, 8 June: 25.2 µg/m³, 2.1× usual Onomichi, 9 June: 21.6 µg/m³, 1.8× usual Onomichi, 10 June: 7.9 µg/m³, 0.7× usual Onomichi, 11 June: 10.3 µg/m³, 0.9× usual Saijō Saijō, 4 June: 11.3 µg/m³, 0.9× usual Saijō, 5 June: 14.8 µg/m³, 1.2× usual Saijō, 6 June: 17.3 µg/m³, 1.4× usual Saijō, 7 June: 21.5 µg/m³, 1.7× usual Saijō, 8 June: 25.0 µg/m³, 2.0× usual Saijō, 9 June: 20.4 µg/m³, 1.6× usual Saijō, 10 June: 8.9 µg/m³, 0.7× usual Saijō, 11 June: 11.7 µg/m³, 0.9× usual 4 Jun 5 6 7 8 9 10 11 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
Yanagawa Fukuoka, Japan 1 7 June 6.0 5.8× Ogōri Fukuoka, Japan 1 7 June 7.7 3.7× Kasuga Fukuoka, Japan 1 7 June 7.3 3.6× Tsuyama Okayama, Japan 1 8 June 9.1 3.5× Anan Tokushima, Japan 1 8 June 9.1 3.4× Kashima Saga, Japan 1 7 June 8.6 3.0× Beppu Oita, Japan 1 8 June 8.7 3.0× Higashigō Saga, Japan 1 7 June 8.9 2.9× Hita Oita, Japan 2 7 June 10.4 2.8× Kariya Hyōgo, Japan 1 8 June 9.1 2.8× Takahashi Okayama, Japan 1 8 June 9.3 2.8× Nantan Kyoto, Japan 1 8 June 9.4 2.7× Okayama Okayama, Japan 1 8 June 9.5 2.7× Maebaru-chūō Fukuoka, Japan 1 8 June 10.0 2.7× Nakatsu Oita, Japan 2 8 June 10.6 2.7× Bizen Okayama, Japan 1 8 June 11.6 2.5× Mima Tokushima, Japan 1 8 June 10.7 2.4× Kurashiki Okayama, Japan 1 8 June 11.0 2.4× Kasaoka Okayama, Japan 1 8 June 11.7 2.4× Ōtsuki Yamanashi, Japan 1 8 June 11.8 2.2× Onomichi Hiroshima, Japan 1 8 June 11.8 2.1× Saijō Ehime, Japan 1 8 June 12.5 2.0×
Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.
Against other episodes in Japan
Number 20 of 27 episodes in Japan since our records began, by cities reached.
Japan, June and July 2025 508 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, July 2026 172 Japan, November 2023 131 Japan, August 2025 126 Japan, January and February 2025 110 Japan, May 2025 103 Japan, March 2025 92 Japan and South Korea, April 2025 86 Japan, June 2025 22 Bars: cities reached; colour: the level of the episode's highest daily reading. All 27 .
Use this page SmogRank, Japan, June 2025: 22 cities with PM2.5 at twice their usual or more, 7 to 8 June 2025, smogrank.com/episodes/2025-06-japan (accessed 2 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.
