He was recognized by Shusuke KONDO (Shusai KONDO) for killing thieves, and this led him to become an adopted son of the Shimazaki family where Shusuke was from, and he then called himself Katsuta SHIMAZAKI.
盗人を退治するなどして近藤周斎（近藤周斎）に認められ、周助の実家である島崎家に養子に入り、島崎勝太と名乗る。