Fudō, Takeshi (15 June 1999). "山県友子" [Yamagata Tomoko]. Meiji people file (in Japanese). Archived from the original on 14 July 2014. Retrieved 4 January 2018.
omoide.us.com
"「田中 義一」の家系" ["Tanaka Giichi" family line]. Omoide Album (in Japanese). Archived from the original on 5 November 2018. Retrieved 4 January 2018.
"「阿部 信行」の家系" ["Nobuyuki Abe" family line]. Omoide Album (in Japanese). Archived from the original on 5 November 2018. Retrieved 4 January 2018.
Fudō, Takeshi (15 June 1999). "山県友子" [Yamagata Tomoko]. Meiji people file (in Japanese). Archived from the original on 14 July 2014. Retrieved 4 January 2018.
"「田中 義一」の家系" ["Tanaka Giichi" family line]. Omoide Album (in Japanese). Archived from the original on 5 November 2018. Retrieved 4 January 2018.
"「阿部 信行」の家系" ["Nobuyuki Abe" family line]. Omoide Album (in Japanese). Archived from the original on 5 November 2018. Retrieved 4 January 2018.