What does it mean word for word?
In the form お姉さん, the prefix o- is an honorific, nee means older sister and -san is a polite suffix.
Which one should you use?
The different forms provide various levels of intimacy and respect. お姉様 is a highly respectful and honorable way to refer to an older sister, whereas お姉さん is slightly less formal. For a warm and affectionate tone, younger siblings or close friends use お姉ちゃん, which replaces the suffix -san with -chan. A more casual and familiar version is 姉ちゃん, which is a shortened form of お姉ちゃん. 姉 is a simple, straightforward term. Finally, 姐御 is a specific term from yakuza subculture used for a female superior or someone with authority.
Is there a formal and an informal way to say it?
お姉様 is a respectful and honorable way to refer to an older sister. お姉さん refers to an older sister in a slightly less formal way than お姉様. 姉 is used when speaking about your own older sister to someone outside your family (humble form). For casual and affectionate situations, use お姉ちゃん or the even more familiar 姉ちゃん. 姐御 is an informal term used in specific subcultures to denote authority.
How do you pronounce it?
onē-san
Did you know?
- While English speakers use 'big sister' for biological siblings, in Japanese, a young girl might call a polite female shopkeeper or a waitress お姉さん to get her attention.
- In Japanese anime and manga, characters often use お姉様 to denote a relationship of deep admiration or a mentor-student bond rather than blood relation.
- While お姉ちゃん is usually for children, some adults continue to use this affectionate form with their sisters throughout their entire lives.
Examples in context
- お姉さんは元気ですか？Oneesan wa genki desu ka?Is your big sister doing well?
- お姉さんの名前は何ですか？Oneesan no namae wa nan desu ka?What is your big sister's name?
Example conversation
Yui and Yota are talking at home about their family.
- 結衣 Yui陽太くん、お姉さんはもう帰った？Yota-kun, oneesan wa mou kaetta?Yota, has your big sister come home yet?
- 陽太 Yotaまだだよ。あとで来ると思う。Mada dayo. Ato de kuru to omou.Not yet. I think she'll be here later.
- 結衣 Yuiそうなんだ。お姉さんに会いたかったな。Sou nanda. Oneesan ni aitakatta na.I see. I wanted to see your big sister.
- 陽太 Yotaあとで僕が伝えておくよ。Ato de boku ga tsutaete oku yo.I'll tell her later.
Sources
- Pronunciation: Wiktionary entry お姉さん, CC BY-SA 4.0, dump of 2026-09-26.
