What does it mean word for word?
The お prefix is an honorific used to show respect, nē is a phonetic variation of ane (older sister) and san is a standard polite honorific.
Which one should you use?
While お姉さん is a standard way to refer to an older sister, there are different versions depending on the level of respect or closeness. For a cute and affectionate tone, use お姉ちゃん. For an even more respectful and deferential tone, use お姉様. When talking to someone outside of your family about your own older sister, use the humble term 姉.
Is there a formal and an informal way to say it?
お姉さん is used in a respectful and formal manner. For a very high level of respect, お姉様 is used. In contrast, お姉ちゃん is an informal, cute and affectionate term typically used by children or within close families. Finally, 姉 is the humble form used when discussing your own sister with people outside your family.
How does it change in a sentence?
To make the phrase plural, you can add the suffix -tachi to the end of the word, forming お姉さんたち.
How do you pronounce it?
onē-san
Did you know?
- In Japanese, you might call a complete stranger お姉さん if you are a young boy or a man trying to be polite or friendly. It is often used as a respectful way to address a young woman in a shop or on the street.
- Using お姉さん to describe your own sister when talking to a stranger is considered a social mistake because it sounds like you are praising your own family.
- While お姉ちゃん is mostly for children, some adults continue using this affectionate form their entire lives to maintain a close, childlike bond with their sister.
Examples in context
- お姉ちゃん、おはよう！Good morning, big sister!
- お姉さん、こちらは友達です。This is my friend, big sister.
- お姉様、ご無事でいらっしゃいますか？Are you well, big sister?
- お姉さんは、どこにいますか。Oneesan wa, doko ni imasu ka.Where is your older sister?
- お姉さんは、とても優しいです。Oneesan wa, totemo yasashii desu.My older sister is very kind.
Example conversation
Daigo is talking to his sister Yui in the living room.
- 大翔 Hirotoお姉さん、これ手伝って！Oneesan, kore tetsudatte!Big sister, help me with this!
- 結衣 Yui今は忙しいから無理よ。Ima wa isogashii kara muri yo.I can't right now because I'm busy.
- 大翔 Hirotoお願い、お姉さん！Onegai, oneesan!Please, big sister!
- 結衣 Yui分かったわよ。後でね。Wakatta wa yo. Ato de ne.Alright. Later, okay?
Sources
- Pronunciation: Wiktionary entry お姉さん, CC BY-SA 4.0, dump of 2026-09-26.
