日本人に

to Japanese people

→ 日本人

phrase Uncommon #19,289

to Japanese people に marks Japanese people as the recipient, target, or—in passive sentences—the agent of an action, so it can also mean “by Japanese people” depending on context.

JA: この話は日本人にもよく知られています。

EN: This story is also well known to Japanese people.

ガルカ日本人に捕まったらどんなことをされる？

Galka, what would happen to you if you were captured by a Japanese person?

— 動くな、死ね、甦れ！ (1990)

日本人にも、着物を着るのは大変です。

Even for Japanese people, wearing a kimono is difficult.

僕は日本に行って麻雀で日本人に勝ちたいと思っている。

I want to go to Japan and beat the Japanese at mahjong.

日本人には想像も出来ないわね

Japanese people can’t even imagine it.

— ラスト、コーション (2007)

あいつ日本人に殺されるな

That guy’s going to be killed by a Japanese person.

— イップ・マン序章 (2008)