Takayama ya dauki matsayin " wakagashira " (若頭) na shida Yamaguchi - gumi a ranar 8 ga Agusta, 2005.
Tabbas, mafi rikitarwa na jumla ita ce "Takayama ya ɗauki matsayin '' wakagashira'( 若頭 ) na shida Yamaguchi - gumi a ranar 8 ga Agusta, 2005, mako guda bayan Tsukasa ya zama' kumicho'( Godfather) na shida Yamaguchi - gumi a Yuli 2005. "