Mackenzie, L. (2013). "Prefectures of Japan". World Leaders Index. Archived from the original on May 25, 2018. Retrieved February 23, 2018.
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Shinpen Nihon no Rekidai Chiji 新編日本の歴代知事 [Historical Prefectural Governors of Japan (New Edition)] (in Japanese) (New ed.). 歴代知事編纂会. November 1991. pp. 477–478. OCLC1020996406.
worldleadersindex.org
Mackenzie, L. (2013). "Prefectures of Japan". World Leaders Index. Archived from the original on May 25, 2018. Retrieved February 23, 2018.
