Talk:Seidou Takizawa/@comment-30269371-20160901225645/@comment-25047329-20160901231704

^This too. Since it's customary to introduce oneself/refer to someone family name first, that's what sticks.

Cultural differences. In Japan it's pretty common to refer to someone by their last name, especially with older people and formal relationships. It's mostly the younger characters that are refered to by their first name (Touka, Ayato, Hinami, Yoriko), with the exception of characters who are close or don't have family names. There's also personal preferences like with Kaneki. The only people who use "Ken" are either family or Yomo who doesn't have great social skills.