Talk:Gokotai/@comment-26705437-20160614034502/@comment-28150993-20161002145848

I don't think it can be called a last name actually, but I'm not sure how Touken Ranbu devs chose the names and nicknames the characters call each other with (e.g. Hotarumaru calls Aizen Kunitoshi "Kunitoshi" even though Hotarumaru is also made by Rai Kunitoshi, thus technically he's Hotarumaru Kunitoshi).

Gokotai's also made by the same swordsmith   (Awataguchi Yoshimitsu, aka Toushirou)  as the other Toushirous and Ichigo Hitofuri. That's why he's also known as Gokotai Toushirou or Gokotai Yoshimitsu. Similarly, Ichigo is also known as Ichigo Hitofuri Toushirou or Ichigo Hitofuri Yoshimitsu.

Why the game choose to use only "Gokotai", is up to interpretation though.