He was adopted by Yasunaga MIYOSHI who was a member of the MIYOSHI clan, a Sengoku daimyo (Japanese territorial lord in the Sengoku period), and named Nobuyoshi MIYOSHI, but he later changed his name to Hidetsugu HASHIBA.
はじめ、戦国大名・三好氏の一族・三好康長に養子入りして三好信吉（みよしのぶよし）と名乗っていたが、後に羽柴秀次と改名する。