Masato could not walk straight afterwards and he did not answer the bell for the third round, giving Souwer the victory by TKO and making him the 2007 K-1 World MAX champion. K-1 WORLD MAX 2008 On October 1, 2008, Masato won his second K-1 MAX title, defeating Yoshihiro Sato and Artur Kyshenko. Retirement Masato fought his retirement fight against Andy Souwer. Masato won the fight after five rounds where he dropped Souwer with a right hand in the fourth round. K-1 Global EP In May 2012, Masato was announced as the executive producer for K-1 Global. A K-1 Global press release on 31 December 2012 announced that Masato resigned from his position as the executive producer. Titles K-1 2008 K-1 World MAX Champion 2007 K-1 World MAX Runner-up 2004 K-1 World MAX Runner-up 2003 K-1 World MAX Champion 2003 K-1 MAX Japan Champion 2002 K-1 MAX Japan Champion International Sport Kickboxing Association 2000 ISKA Oriental rules World Welterweight Champion All Japan Kickboxing Federation 1999 AJKF Welterweight Champion Kickboxing record |- bgcolor="#CCFFCC" | 2009-12-31 || Win ||align=left| Andy Souwer || Dynamite!! 2009 || Saitama, Japan || Decision (Unanimous) || 5 || 3:00 || 55-6-2 |- bgcolor="#CCFFCC" | 2009-07-13 || Win ||align=left| Tatsuya Kawajiri || K-1 World Max 2009 Final 8 || Tokyo, Japan || TKO (Corner Stoppage) || 2 || 1:43 || 54-6-2 |- bgcolor="#CCFFCC" | 2008-10-01 || Win ||align=left| Artur Kyshenko || K-1 World MAX 2008 Final, Final || Tokyo, Japan || Ext R. Decision (Unanimous) || 4 || 3:00 || 53-6-2 |- ! style=background:white colspan=9 | |- |- bgcolor="#CCFFCC" | 2008-10-01 || Win ||align=left| Yoshihiro Sato || K-1 World MAX 2008 Final, Semi Finals || Tokyo, Japan || Ext R. Decision (Unanimous) || 4 || 3:00 || 52-6-2 |- bgcolor="#CCFFCC" | 2008-07-07 || Win ||align=left| Gago Drago || K-1 World MAX 2008 Final 8, Quarter Finals || Tokyo, Japan || Decision (Unanimous) || 3 || 3:00 || 51-6-2 |- ! style=background:white colspan=9 | |- |- bgcolor="#CCFFCC" | 2008-04-09 || Win ||align=left| Virgil Kalakoda || K-1 World MAX 2008 Final 16 || Tokyo, Japan || KO (Right Hook) || 3 || 0:22 || 50-6-2 |- ! style=background:white colspan=9 | |- |- bgcolor="#CCFFCC" | 2007-12-31 || Win ||align=left| Yong Soo Choi || K-1 Premium 2007 Dynamite!! || Osaka, Japan || TKO (Corner Stoppage) || 3 || 0:51 || 49-6-2 |- bgcolor="#FFBBBB" | 2007-10-03 || Loss ||align=left| Andy Souwer || K-1