"Shinriji Tantō Busho no Oshirase" 新理事担当部署のお知らせ [New JSA officers and their respective responsibilities announced] (in Japanese). Japan Shogi Association. May 28, 2007. Retrieved January 21, 2020.
"Shinriji no Oshirase" 新理事のお知らせ [New JSA officers announced] (in Japanese). Japan Shogi Association. May 27, 2009. Retrieved January 21, 2020.