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(List of Provinces of Japan > Tōsandō > Shinano Province > Saku District) was a district located in Shinano Province (now Nagano Prefecture). The former is estimated to be located at Nagatoro in the city of Saku.〔 *毎日新聞2007年10月11日『西近津遺跡群：古代郡衙推定地、竪穴住居跡から銅製印鑑－－佐久／長野』によれば、佐久市長土呂の西近津地域が郡衙の推定地であるとされている () * 西近津遺跡群発掘（長野県埋蔵文化財センター）() *金沢大学文学部史学科考古学研究室『金大考古』Vol.56 長野県佐久地方の遺跡案内 () *信濃毎日新聞2007年11月7日によれば、『「郡」と刻んだ須恵器 佐久・西近津遺跡群で出土』()〕 Due to land reforms, Saku District split into Minamisaku (南佐久郡) and Kitasaku (北佐久郡) Districts on January 14, 1879. ==Pesticide problems== Cases of dermatitis caused by pesticide exposures, tabulated by the Division of Dermatology, Saku Central Hospital, Japan, from 1975 to 2000 are described. Dermatitis cases gradually decreased from 1975 to 2000, presumably accelerated by the phase-out of dermatitis-causing pesticides, including difolatan fungicide and salithion, an organophosphorous insecticide. Cases of chronic and solar dermatitides gradually decreased, which may be explained by reductions in the use of allergenic or photosensitive sulfur agents and organophosphates. However, the ratios of chemical burns from irritant pesticides—calcium polysulfide, dazomet, methyl bromide, chlorpicrin, paraqat/diquat, organophosphorus, quintozene, and glyphosate—rose in those years. Chemical burns from calcium polysulfide were responsible for most of the severe cases. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Saku District, Shinano」の詳細全文を読む スポンサード リンク
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