On May 9, 1997, he participated Super Fight in the event of Shoot Boxing World Tournament 1997, and fought against Dany Bill from France.
[2] On October 12, he participated "'97 The Festival of Martial Arts Special" as the representative of shoot boxing and fought against Sitisak Tor Anuson who was the champion of Lumpinee Stadium at Junior welterweight.
[3] On April 26, 1998, he fought against Gilbert Ballantine from Netherlands in the event of "RKS Presents Shoot the Shooto XX".
Nishibayashi stood up, but referee stopped the bout because of too much bleeding, and Ogata won by TKO at 2:15 during 3R and became the first champion.
On November 14, 1998, he challenged Ramon Dekkers' WPKL World Junior middleweight championship (-69.85 kg) in Chiyoda, Tokyo, but he was knocked out with left hook at 2:58 during 4R.
[10][11] On February 24, 2004, Ogata participated K-1 World MAX 2004 Japan Tournament and fought against Kozo Takeda in the quarter-final.
[12][13] The result of this bout is announced as Takeda's victory by the unanimous decision after 3R in the official website, but it is wrong.
In the final, Ogata knocked down Andy Souwer with right hook during 1R and won by the unanimous decision.
According to his explanation, he tried to continue his career, but he was stopped by doctor as his cervical vertebrae had not been recovered since the bout against Andy Souwer on November 24, 2008.