Japan Radiation Map
Concerned with the lack of understandable information in the current situation, the Institute for Information Design Japan is collecting all available measurements to compile a consistent and comprehensive Japan Radiation Map.
Most of the data used are updated hourly, however some sources provide data in larger intervals or require manual transcription; in this case we can not guarantee regular updates.
We do intentionally refrain from using any interpretative elements - such as thresholds or advisories. This needs to happen somewhere else with more competent people involved.
Measurements are interchangeably provided in Grey/Sievert units at the source. Here all measurements are given in the nano Sievert/hour (nSv/h) measure - following the simplified equation where 1 Grey (Gy) = 1 Sievert (Sv).
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IIDj, Institute for Information Design Japan | mail
Disclaimer: IIDj has no past nor current business relations with any of the actors in the nuclear power industry.

Overlays

Fukushima 20km Off-Limits-Zone

Fukushima

Fukushima City
| Fukushima City
1,000
nSv/h
source
Japan Radiation Map

Fukushima City
| Fukushima City
1,330
nSv/h
source
Japan Radiation Map

Fukushima City
| Fukushima City
700
nSv/h
source

870

850

1,200

Nihonmatsu City
| Nihonmatsu City

Date City
| Date City

Kawamata Cho
| Kawamata Cho

Motomiya City
| Motomiya City

Otama Mura
| Otama Mura

Koori Machi
| Koori Machi

Kunimi Machi
| Kunimi Machi

Namie Machi
| Namie Machi

Kooriyama City
| Kooriyama City

nSv/h: 80

Sukagawa City
| Sukagawa City

Tamura City
| Tamura City

Kawauchi Mura
| Kawauchi Mura

Kagamiishi Machi
| Kagamiishi Machi

Tenei Mura
| Tenei Mura

nSv/h: 50

Ishikawa Cho
| Ishikawa Cho

Tamagawa Mura
| Tamagawa Mura

Hirata Mura
| Hirata Mura

Asakawa Machi
| Asakawa Machi

Furudono Machi
| Furudono Machi

Miharu Machi
| Miharu Machi

Ono Machi
| Ono Machi

Iwasaki City
| Iwasaki City

Shirakawa City
| Shirakawa City

Nishigo Mura
| Nishigo Mura

Nasu Machi
| Nasu Machi

Izumizaki Mura
| Izumizaki Mura

Nakashima Mura
| Nakashima Mura

Yabuki Machi
| Yabuki Machi

Tanagura Machi
| Tanagura Machi

nSv/h: 90

Yamatsuri Machi
| Yamatsuri Machi

Daigo Machi
| Daigo Machi

Hanawa Machi
| Hanawa Machi

Samegawa Mura
| Samegawa Mura

Aizuwakamatsu City
| Aizuwakamatsu City

Yugawa Mura
| Yugawa Mura

Kitashiobara Mura
| Kitashiobara Mura

Aizubange Machi
| Aizubange Machi

Nishiaizu Machi
| Nishiaizu Machi

Kitakata City
| Kitakata City

Inawashiro Machi
| Inawashiro Machi

Bandai Machi
| Bandai Machi

Yanaizu Machi
| Yanaizu Machi

Mishima Machi
| Mishima Machi

Kaneyama Machi
| Kaneyama Machi

Showa Mura
| Showa Mura

Aizumisato Machi
| Aizumisato Machi

Shimogo Machi
| Shimogo Machi

Minamiaizu Cho
| Minamiaizu Cho

Hinoemata Mura
| Hinoemata Mura

Tasami Machi
| Tasami Machi

Soma City
| Soma City

Shinchi Machi
| Shinchi Machi

Minamisoma City
| Minamisoma City

Hirono Cho
| Hirono Cho

Nahara Cho
| Nahara Cho

Tomioka Machi
| Tomioka Machi

Okuma Machi
| Okuma Machi

Futaba Machi
| Futaba Machi

Katsurao Mura
| Katsurao Mura

Iitate Mura
| Iitate Mura

Yamagata City
| Yamagata City

Kaminoyama City
| Kaminoyama City

Nanyo City
| Nanyo City

Takahata Machi
| Takahata Machi

Yonezawa City
| Yonezawa City

Nasushiobara City
| Nasushiobara City

Otawara City
| Otawara City

Nakagawa Machi
| Nakagawa Machi

Nikko City
| Nikko City

Kita Ibaraki City
| Kita Ibaraki City

Takahagi City
| Takahagi City

Hitachi City
| Hitachi City

Hitachiota City
| Hitachiota City

Hitachiomiya City
| Hitachiomiya City

Shichikashuku Machi
| Shichikashuku Machi

Shiroishi City
| Shiroishi City

Marumori Machi
| Marumori Machi

Kakuda City
| Kakuda City

Ogawara Machi
| Ogawara Machi

Yamamoto Cho
| Yamamoto Cho

Watari Machi
| Watari Machi

Shibata Machi
| Shibata Machi

Murata Machi
| Murata Machi

Zao Machi
| Zao Machi

Kawasaki Machi
| Kawasaki Machi

Iwanuma City
| Iwanuma City

Natori City
| Natori City

Sendai, Wakabayashi Ward
| Sendai, Wakabayashi Ward

Sendai, Taihaku Ward
| Sendai, Taihaku Ward

Rifu Machi
| Rifu Machi

Sendai, Izumi Ward
| Sendai, Izumi Ward

Sendai, Aoba Ward
| Sendai, Aoba Ward

Shiogama City
| Shiogama City

Matsushima East City
| Matsushima East City