Tomodachi, ...san, ...chan, ...kun

ともだち　tomodachi
  • 友達　ともだち　tomodachi = friend
  • 仲間　なかま　nakama = member of a group
  • 友人　ゆうじん　yuujin = friend (formal)

～さん、～ちゃん、～くん、～さま ...san, ...chan, ...kun, ...sama
  • ～さん　...san (formal)
  • ～ちゃん　...chanb (basically for child, sounds cute)
  • ～君　～くん　...kun (basically for boy)
  • ～様　～さま　...sama (formal, respect)