At the beginning of the Showa period, Kan SHIMOZAWA interviewed Gennojo's son, Tamesaburo YAGI, collected Gennojo's words and published that in his book "Shinsengumi Ibun".
昭和初期、子母澤寛の取材によって、息子・八木為三郎が父の遺談を伝え、子母澤寛著『新選組遺聞』に収められた。