Excuse me, can anyone give me some advice on what these two Japanese names should be translated into Chinese?

Japanese surnames generally have one pronunciation corresponding to only one way of writing Chinese characters, while given names can be written in multiple ways.

1. Koji Murabayashi Which is the surname and which is the given name? What is the name translated into Chinese?

Surname: Murabayashi: Murabayashi

First name: Koji Koji, Koji, Koji, Koji, Koji?

2, Kaoru Tanaka Which is the surname and which one? Is it a name? What is the name translated into Chinese?

Surname: Tanaka: Tanaka

First name: Kaoru: Kaoru, Iku, Xin