Translation guide
In Japanese, the word for 'older brother' depends on whose brother you're talking about, the formality of the situation, and your relationship with the listener. There is no single all-purpose word.
When speaking to someone outside your family about your own older brother, use humble terms.
Standard humble term for your own older brother when talking to outsiders.
My older brother lives in Tokyo.
When talking about someone else's older brother, use respectful terms.
Polite and common way to refer to someone else's older brother.
お兄さんはお元気ですか。
How is your older brother?
Very formal and respectful, used in historical or ceremonial contexts.
When speaking to your own older brother, use family terms of address.
Affectionate and common way to address your older brother, especially by younger siblings or in casual family settings.
お兄ちゃん、遊ぼう！
Big brother, let's play!
Slightly more mature or less childish than お兄ちゃん, still casual and used within the family.
兄さん、ちょっと手伝って。
Bro, help me out a bit.
Rough, masculine, and very casual. Often used by young men or in gangster contexts. Can also mean 'big bro' in a non-family sense.
When you need a neutral, descriptive term without specifying whose brother, often in written or formal contexts.
Can be used in definitions or when the relationship is clear from context. Also used in compounds.
彼には兄が二人いる。
He has two older brothers.
Means 'brothers' or 'siblings'. When referring to an older brother specifically, you might say 兄の方 (あにのほう) or use context.
兄弟 alone does not specify older or younger; it refers to brothers or siblings in general.
Using お兄さん to refer to your own older brother when speaking to someone outside your family sounds like you are elevating your own family member, which is considered rude. Use 兄 (あに) instead.
In Japanese families, it's common to address an older brother by his given name or a nickname, especially among adults or when the age gap is small. Using お兄ちゃん etc. is more common among children or in very close families.
Is your honorable older brother at home?
Big bro, you're so cool!
兄弟の中で兄が一番背が高い。
Among the siblings, the older brother is the tallest.