How do you say "お姉さん (Onee-san)" in Japanese?

"お姉さん (Onee-san)" in Japanese means "Big sister". 「お姉さん (Onee-san)」 is the polite way to say 'older sister' in Japanese. It is used when addressing or referring to someone else's older sister, or when speaking to your own older sister. There are other ways to say 'older sister', such as 「姉 (Ane)」, which is used when referring to your own older sister in a more casual or humble way when speaking to someone else.

Can you give an example of "お姉さん (Onee-san)" in a sentence?

"お姉さんは優しい" which translates to "Big sister"

Learn "お姉さん (Onee-san)" in Japanese