It is 「ピース」or "piisu" in Japanese

Though that is a loan word version, I dont yet know if there's a native equivalent

Edit:

This is the native version of the word: https://jpdb.io/vocabulary/1154070/%E5%AE%89%E6%B3%B0/%E3%81%82%E3%82%93%E3%81%9F%E3%81%84?lang=english#a

*disclaimer: I'm learning japanese so it's not my native language