2018 - 2021 A Study on the Regional Characteristics of Agricultural Structure under Changing Labor Market Environment
2015 - 2019 Growth of oil palm industry and local society in Indonesia - resource allocation, income distribution, and social transformation
2015 - 2019 Agricultural structure and farming in Okinawa
2014 - 2018 Smallholders and Plantation Companies of Oil Palm in Southeast Asia: The Changes of Their Behaviour Accompanying the Globalization and Those Influences
2010 - 2012 Study on agricultural structure change in the epoch of mass unemployment
2011 - 2011 チャおよびイネにおける自然共生型の植物防除生産技術の開発
2011 - 2011 「大量失業時代」における地域農業の構造変動研究
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Papers (27):
Arai W. Sachiho, Oro Kohei, Okuma Mizuha. Dynamics of Local Labor Markets and Agricultural Structures in the Okinawa Remote Islands: A Comparative Study of Tarama Island and Yonaguni Island. Japanese Journal of Human Geography. 2021. 73. 2. 159-180
ARAI, S. W. The Current State of Technological Adoption in Sayama Tea-producing Area and Developments in Production Organization. Japanese Journal of Human Geography. 2016. 68. 2. 211-227
Nagata, J, Arai, W. S. Manurung,Gulat. Social Map of Riau, Indonesia: Frontier Develpment and its Outcomes. Komaba Studies in Human Geography. 2014. 21. in press
山崎 亮一, 新井 祥穂, 曲木 若葉. The Rural Labour Market and Agricultural Structures in "Kinki-Type Hilly and Mountainous Farming Areas" : Categories of Organized Management Entities and Internal Wage Disparities, Kamiina Region, Nagano Prefecture. 歴史と経済 : the journal of political economy and economic history. 2018. 60. 4. 19-34
新井 祥穂, 永田 淳嗣. Analysis on Wage Standard of Oil Palm Plantation Workers in Indonesia. 農業経営研究 = Japanese journal of farm management. 2018. 56. 2. 93-98
Evolutionary Change in the Oil Palm Plantation Sector in Riau province, Sumatra. in "The Palm Oil Controversy: a Transnational Perspective"
Institute of South East Asian Studies, Singapore 2013