And Saneyuki AKIYAMA who invented the Crossing the T tactic and wiped out the Baltic Fleet while he was serving as the senior staff officer in Nihonkai Kaisen (Naval battle of Japan sea) was Yoshifuru's younger brother.
また、日本海海戦で、先任参謀として丁字戦法を考案、バルチック艦隊を撃滅した秋山真之は実弟にあたる。