瀬戸内地方における水田二毛作の存立構造

―岡山県と香川県の比較分析―

抄録

The objective of this study is to clarify factors for the existence of double cropping paddy farming in the Setouchi region, comparing Okayama and Kagawa Prefecture. Diversification of rice varieties has been progressing due to the policy supports for new demand rice and the high temperature damages caused by climate change after the 2010s. We clarified that disseminating late-ripening varieties is necessary to maintain double cropping farming. Large farmers in Okayama could extend the planting period, while community farms in Kagawa could not expand their farm size due to irrigation rules and late harvest of wheat without late-ripening varieties.