Apr 28, 2022 · I think it's the shortened, nickname-style version of "Onii-san" (older brother in Japanese). I first heard it on Higurashi no Naku Koro ni, from the character Houjou Satoko. She called her older ...

Apr 28, 2022 · Nii-chan or Nii- nii is Japanese for older brother. Onii-chan is someone else's older brother.