Japanese · Family & People
oniisan
Older brother
The respectful term for an older brother. When referring to your own, you use 兄 (ani). Used also to address a young man respectfully.
お兄さんは何歳ですか?
How old is your older brother?
'お兄さん' (oniisan) combines the respectful 'お' with '兄' (ani), conveying familiarity and respect towards one’s older brother in familial and social interactions.
'お兄さん' (oniisan) is commonly used in informal contexts when addressing older brothers, but can be used formally when speaking to others about their siblings.