I've got a life long friend who's full first name is Josh, derived from the Japanese name Yosh. People often try to call him Joshua and it annoys the hell out of him.
I've got a life long friend who's full first name is Josh, derived from the Japanese name Yosh. People often try to call him Joshua and it annoys the hell out of him.
Yosh would always be an abbreviation in Japanese. And only done for foreigners, not for other Japanese.
Yoshihiro or Yoshiyuki would likely be called Yoshi by their friends.