Kazumi Totaka

From the Super Mario Wiki

Kazumi Totaka, the voice of Yoshi.

Kazumi Totaka is a music composer for Nintendo, and mainly works with Nintendo R & D 1. He has done the musical score to many games, including Super Mario Bros., Super Mario Sunshine, Mario Paint, Super Mario World, and many more. He is also very popular for doing the music to The Legend of Zelda series, and the Animal Crossing series. He also does the voices of Yoshi and Professor E. Gadd.

There is an interesting piece of music, that Totaka has sneaked into almost all of the games he's composed. Although it is not widely known, players can listen to a secret track of Totaka's, after meeting certain conditions. The Mario games it has been spotted in are:

Super Mario Land 2: 6 Golden Coins - On the "Game Over " screen, after a pause of minute's length Totaka's song will play.
Virtual Boy Wario Land - On the end screen that appears after the credits, the track plays after a minute and a half
Mario Paint - The player can touch the O in the word MARIO, when on the main screen. After that, the O will explode like a bomb, and Totaka's song will play.
Yoshi's Story - On the Trial Mode screen, Totaka's song will take over after the main theme plays a few times.
Luigi's Mansion - On the screen showing the controls of the Poltergust (this appears before training mode), the song plays after 3.5 minutes of idleness
Yoshi Touch & Go - In Marathon Mode, once the player reaches a mountainous area where clouds are being blown away, a small pause leads to the song.

Totaka is also composing for Super Smash Bros. Brawl, so the song may appear in there.

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