is a Japanese retired welterweight kickboxer. He was the ISKA World Welterweight Oriental Rules champion, as well as the winner of the K-1 WORLD MAX World tournament in 2003 and 2008. In addition, he was also the runner-up of the K-1 World MAX World tournament in 2004 and 2007. Prior to the K-1 Rising event in Madrid in May 2012, it was announced that Masato will be working as an executive producer for K-1. Biography Early life Masato Kobayashi (小林 雅人) was born in Kashiwa City, Chiba Prefecture Japan on March 10, 1979. When he was young, he moved to Niiza, Saitama because of his parents' job. He started going to Asagiri Municipal Asagiri 4th Junior High School (ja). After graduating junior high school, he started attending the Saitama Sakae High School (ja), but soon dropped out with his friends. He described the reason for dropping out simply as "enthusiasm" when he appeared on popular Japanese television show "Junk Sports" (ja). After dropping out, he worked many jobs but did not hold a steady position. Although he got a job as an assistant at a Yakitori bar, he quit the job on the first day, saying he was "going to leave for lunch". In 1994, when he was 15 years old, he joined Yonekura Boxing Gym. After failing his test for a professional boxers' license, he left the gym. When he was 17 years old, he joined Fuji Gym and started learning kickboxing, because he thought kickboxing was useful for street fighting. After passing the exam for professional kickboxing, he became a professional kickboxer under All Japan Kickboxing Federation (AJKF). Before his first fight, Shigeo Kato, the owner of Fuji gym, tried to name him "Fuji Sankaizan" (藤 山海山) for his ring name, but was denied. Thereupon, Kato suggested another ring name Masato (魔裟斗), "the homonym term of Masato (雅人)". He accepted that name but he did not like it because it gave a bad impression as its script was similar to Japanese motorcycle gangs names. All Japan Kickboxing Federation Masato made his professional debut on March 23, 1997, against Hutoshi Takehara, winning by KO in the first round. In his second bout, he fought against Takayuki Kohiruimaki on May 30, losing by KO due to knee strikes in the third. Originally, this bout was promoted as an ordinary freshman bout of three rounds, but was later upgraded to the