Tokamachi City in Niigata Prefecture is located 205 kilometers west of Fukushima I Nuclear Power Plant. It's not even under the plume according to Professor Hayakawa's map.
Tokamachi is the green arrow. Fukushima I Nuke Plant is the red tag "D". (Map created at Jukurabe.)
From Yomiuri Shinbun (1:37PM JST 8/22/2011):
新潟県十日町市は２２日、市が保育施設の土壌などの放射性物質調査を行った結果、市立白梅保育園で雨水を集める槽にたまった泥から１キロ・グラム当たり１万８９００ベクレル、私立愛宕幼稚園で草葉の堆積物から同２万７０００ベクレルの放射性セシウムが検出されたと発表した。
Tokamachi City in Niigata Prefecture announced on August 22 the result of the survey of radioactive materials in the soil in nursery schools and kindergartens in the city. 18,900 becquerels/kg of radioactive cesium was found in the sludge at the bottom of the container that collects rainwater at a public nursery school, and 27,000 becquerels/kg of radioactive cesium was found in the yard compost pile at a private kindergarten.
８０００ベクレル超～１０万ベクレルは管理型処分場での仮置き対象となり、市は県と処分方法について相談する。
If the level of radioactive cesium exceeds 8,000 becquerels/kg up to 100,000 becquerels/kg, it has to be temporarily stored at a controlled processing plant. The city will consult the prefectural government as to how to dispose the sludge and the yard compost.
今月１２日に採取し、県内の検査機関に調査を委託していた。両園とも、検査地点の地上１メートルの空間放射線量はそれぞれ０・１０マイクロ・シーベルトと０・１４マイクロ・シーベルトで、通常の範囲内だったという。
The samples were taken on August 12, and tested at a testing laboratory in Niigata. At both locations, the air radiation levels at 1 meter above the ground was 0.10 microsievert/hour and 0.14 microsieverts/hour, both of which were within the normal range.