In the 'Kyogata roninbetsu' (registers of ronin in Kyoto), the record in Aizu Domain, 35 roshi who asked to serve Katamori were recorded, and Fujimoto's name is recorded as 'Roshi gashira' (the head of roshi.)
容保に奉公を願い出た浪士35人を記した会津藩の記録の「京方浪人別」に「浪士頭」として藤本の名が見える。