Kōichi Sekiguchi

1959

• Kodai Kamitsukeno no chisei to shinkō
• Kodai Kamitsukeno no shakai kiban
• Kodai Kamitsukeno o meguru hitobito
• Kodai Kamitsukeno-uji no kisoteki kenkyū
• Nihon kodai chiiki henseishi josetsu
• Tōgoku no kodai chiikishi
• 上毛野の古代農業景観