Masato (魔裟斗) is a Japanese professional kickboxer and the 2003 K-1 MAX World Grand Prix champion. He has appeared in several movies and is considered an idol in Japan. He married actress Shin Yazawa on February 13, 2007.
- Name: Masato (魔裟斗)
- Birth Name: Masato Kobayashi (小林雅人 Kobayashi Masato)
- Birth Date: March 10, 1979
- Birthplace: Kashiwa, Chiba Prefecture, Japan
- Blood type: O
- Height: 5'9" (174cm)
-  Dead or Alive 2: Birds ... Hoo
-  Buyuden
-  Izo ... Swordsman
-  Lethal Ninja ... Tora Daisuke
- Masato's kickboxing nickname is Silver Wolf, which is also the name of his gym.
- He fights at 70kg (155lbs), which is the maximum for middleweight status in K-1