山口胜平

山口胜平是一名演员，因为作品海贼王 (1999), Death Note (2006) and Inuyasha (2000)而被大众所熟知。

Hobbies includes climbing and computers.

As of March 2006, he is tied with Megumi Hayashibara as the third most prolific voice actor in Japan, behind second ranked Shinichirô Miki and top ranking Takehito Koyasu, respectively.

Recently he has taken on different roles such as L in Death Note and Hugh in Kiba which are serious characters with a lower voice range. Hugh (in Kiba) was an exception in that it is not only an adult role but also a villain.

Many, if not most of Yamaguchi's voice roles are teenagers or even younger boys. He is well-known for his ability to perform high-pitched, "young" voices. This is especially noticeable in BL dramas/games. His characters are also generally straightforward-minded, sometimes simple-minded, humorous and easily excitable but usually "good" characters.

Yamaguchi has starred in several projects directly opposite Takehito Koyasu; either as couples or related paired characters, with Yamaguchi playing the younger role. In 12 Kokuki they are the 2 prominent kirins (Enki and Keiki)in the story; in the Sukisho games and drama CD's they are a couple (Ran and Yoru); in the Tokyo Babylon OVA they are respectively Subaru and Seishiro. They also share more couple roles in many BL drama Cd's.

Cory Matthews - Boy Meets World (Japanese dub, beginning with episode 3).

The second Japanese dub voice of Bugs Bunny, he replaced Kei Tomiyama.

Sometimes mistranslated as Katsuhei Yamaguchi or Shohei Yamaguchi.

Works for Gekidan 21 Seiki Fox.

Is married and has one son.

Does dubbing voice of Kyle from South Park.