IIDj, is collecting available measurements since March 26 of 2011 to provide 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 Gray/Sievert units at the source. The Japan Radiation Map shows all measurements in the nano Sievert/hour (nSv/h) unit - following the simplified equation where 1 Gray (Gy) = 1 Sievert (Sv).
Please share!
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.
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 Gray/Sievert units at the source. The Japan Radiation Map shows all measurements in the nano Sievert/hour (nSv/h) unit - following the simplified equation where 1 Gray (Gy) = 1 Sievert (Sv).
Please share!
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.
| Tokyo | nSv/h | Δ%, 7-days | Wind-Speed(m/s) | Direction | |||||
| Koto City, Aomi | 37 |  | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Ota City, Hanedakūkō | 31 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Adachi City, Tonerikoen | 30 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Edogawa City, Kamishinozaki | 37 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Hachioji, Minamiōsawa | 33 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Chofu, Nishimachi | 20 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Kodaira, Nakajimachō | 34 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Shinjuku | 36 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Koto | 37 | | 26-11-04 02:01 | 東京都健康安全研究センター | Source | ||||
| Gifu | nSv/h | Δ%, 7-days | Wind-Speed(m/s) | Direction | |||||
| Ibigawa, Miwa | 59 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Tajimi, Hinodemachi | 65 |  | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Takayama, Hanaokamachi | 81 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Ibigawa | 104 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Gifu | 55 |  | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Kakamigahara | 62 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Ogaki | 59 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Mino | 59 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Gujo | 62 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Ena | 75 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Gero | 82 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||
| Sekigahara | 72 | | 26-11-04 03:10 | 岐阜県 保健環境研究所 | Source | ||||