On April 16, 1864, "Rakuyo Nikki (literally, Kyoto diary)" by Raizo YAMAMOTO of the Tosa domain recorded, 'I heard that today Ishisei (abbreviation of Seinosuke ISHIKAWA, an alias of Shintaro NAKAOKA) met and had a discussion with Juro KIMOTSUKI and Hanjiro NAKAMURA of Satsuma. Both of them were said to be quite righteous.'
元治元年（1864年）4月16日、土佐の山本頼蔵の『洛陽日記』に「当日石清（中岡慎太郎の変名、石川清之助の略）、薩ノ肝付十郎、中村半二郎ニ逢テ問答ノヨシ。此両人ハ随分正義ノ趣ナリ」とある。