• 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?

Reference

1. 林野庁(2024): きのこや山菜の出荷制限等の状況(福島県), 令和6年3月28日更新. https://www.rinya.maff.go.jp/j/tokuyou/kinoko/qa/seigenfukusima.html (2024.11.18アクセス)