Other materials state that when he was in Edo he would hang out in Isami KONDO's kendo training hall, the Shieikan training hall, but when KONDO had all the members of Shieikan training hall staying in Kyoto bring weapons to him, SAITO was not included among the members.
江戸にいた時近藤勇の道場試衛館に出入りしていたという史料もあるが、のちに近藤が京都に滞在した試衛館の一同に武具を届けさせたとき、そのなかに斎藤は含まれていなかった。