1.
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2012
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Broadband deployment and government policies in islands: case studies in Japan (7th China-Japan-Korea Joint Conference on Geography, Changchun City, China)
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2.
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2011
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Broadband policies for limited Internet-access areas by local governments: An analysis based on the questionnaire survey in Japan (Digital Communities 2011, Athens)
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3.
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2007
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Security Services Based on mobile phone Networks: Cases in Japan (Digital Communities 2007 at Tallinn, Estonia ~Helsinki, Finland)
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4.
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2004
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Population Aging in the Suburbs of the Tokyo Metropolitan Area (30th International Geographical Conference at Glasgow, UK)
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5.
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2003
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The Use of Land Property and the Progress in the Aging of Population in the Central Tokyo (The 7th Asia/Oceania Regional Congress of Gerontology)
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