Brief History
While not that well known in North America Yamamoto has been on a roll in K1even holding a first round win over now retired and soon to be legend, Genki Sudo. His only loss remains at the hands of Stehpan Palling via Cut in the first round and since then has been racking up Highlight KO after Highlight KO.

Professional MMA Record

Win Istvan Majoros TKO (Punches) K-1-Premium 2006 Dynamite!! 12/31/2006 1 3:46
Win Kazuyuki Miyata KO (Flying Knee) K-1-Hero's 5 5/3/2006 1 0:04
Win Genki Sudo TKO (Punches) K-1-Premium 2005 Dynamite!! 12/31/2005 1 4:39
Win Caol Uno TKO (Cut) K-1-Hero's 3 9/7/2005 2 4:04
Win Royler Gracie KO (Punch) K-1-Hero's 3 9/7/2005 2 0:38
Win Ian James Schaffa TKO (Strikes) K-1-Hero's 2 7/6/2005 3 1:23
Win Jadamba Narantungalag KO (Punches) K-1-World Max 2004 10/13/2004 1 1:55
Win Kazuya Yasuhiro Submission (Armbar) K-1 MAX-World Grand Prix 2004 Final 7/7/2004 2 2:40
Win Tony Valente Submission (Rear Naked Choke) K-1 MAX-World Grand Prix 2004 Opening Round 4/7/2004 1 0:58
Win Caleb Mitchell KO (Punch) Shooto 2003-9/5 in Korakuen Hall 9/5/2003 1 0:40
Win Jeff Curran Decision (Unanimous) SB 29-SuperBrawl 29 5/9/2003 3 5:00
Win Tetsuo Katsuta TKO (Punches) Shooto-Treasure Hunt 10 9/16/2002 1 2:45
Loss Stephen Palling TKO (Cut) Shooto-Treasure Hunt 6 5/5/2002 1 0:30
NC Josh Thomson No Contest - Yamamoto Kicked in Groin Shogun 1-Shogun 1 12/15/2001 2 2:00
Win Hideki Kadowaki TKO (Punches) Shooto-To The Top 8 9/2/2001 1 4:02
Win Masashi Kameda KO (Punch) Shooto-To The Top 6 7/6/2001 1 4:17
Win Masato Shiozawa Decision (Unanimous) Shooto-To The Top 2 3/2/2001 2 5:00

Jack gets da ladies