How do you write older brother in kanji?

There isn't one single perfect translation for "older brother" in kanji, as the best choice depends on the context and level of formality. Here are a few options:

* 兄 (あに/ani): This is the most common and generally preferred kanji. It's a simple and direct way to say "older brother." It's suitable for most situations.

* 兄貴 (あにき/aniki): This is a more affectionate and somewhat informal term for older brother. It carries a connotation of respect and sometimes even a bit of admiration or reverence.

* お兄さん (おにいさん/onii-san): This is a polite and respectful way to refer to someone else's older brother, or even your own, in a more formal setting. It uses the honorific "-san."

Therefore, while 兄 (ani) is the most straightforward translation, the best choice will depend on the specific nuance you want to convey.