Effects on Ecosystem
（2024）
ＱWhat is the current concentration of radioactive cesium in edible wild plants in Fukushima Prefecture?
ＡAbout 60 items of wild plants and mushrooms in Fukushima Pref. have been monitored, and products which exceed reference value are decreasing.
- Wild plants and mushrooms planted or harvested for sale or shipment are monitored to confirm their safety.
- About 60 items of wild plants and mushrooms in Fukushima Pref. have been monitored, and products which exceed reference value of Ministry of Health, Labour and Welfare are decreasing.
- As a result of monitoring, 19 items are restricted shipping containing bed-grown shitake mushroom, wild mushroom, bamboo-shoot, etc.
Fig. 1 Restrictions, etc. on shipments of log shiitake mushrooms (cultivated in the open)
Reference: Forestry Agency, March 28, 2024
Table 1 Monitoring results of mushrooms and wild plants
| monitored items | exceeding reference value | |
|---|---|---|
| FY2012 | 1,180 | 90 |
| FY2013 | 1,457 | 80 |
| FY2014 | 1,564 | 25 |
| FY2015 | 1,562 | 7 |
| FY2016 | 1,833 | 3 |
| FY2017 | 2,111 | 1 |
| FY2018 | 1,733 | 1 |
| FY2019 | 1,942 | 0 |
| FY2020 | 1,641 | 0 |
| FY2021 | 1,292 | 0 |
| FY2022 | 1,103 | 0 |
| FY2023 | 953 | 0 |
Reference：Number of monitored items(FY2011-FY2023)（Fukushima pref, partially modified）
https://www.pref.fukushima.lg.jp/site/portal/ps-monthly-report.html (Japanese only)
Fig.2 Monitoring results of mushrooms and wild plants
Table 2 Reference values of mushrooms（Bq/kg）
| items | Reference value | Setting |
|---|---|---|
| Mushrooms, wild plants （reference value of general food） |
100 | Apr 2012 |
| Row wood, bed log | 50 | March 2012 |
| Medium of mushroom cultivation | 200 | March 2012 |
Reference：Q&A Current and future of forest, forestry and radioactive material aim to restoration and regeneration (Forestry Agency, Oct 2018, partially modified)
Related articles
- How have the radioactive Cs concentrations changed in wild animals in Fukushima prefecture?
- I heard most of the forests would not be decontaminated. Does cesium remain in the forests?
- How do air dose rates in forests change with time?
- Is there a continuous input of cesium contamination to rivers from forests?