[4] Ohka made his professional wrestling debut on Dramatic Dream Team promotion's International Youth Festival ~ DDT Charity Pro Wrestling Evening Show ~ on October 13, 2001 in an exhibition match in a losing effort against Takashi Sasaki.

[6] Ohka won the KO-D Openweight Championship, DDT's most prestigious title on June 28, 2015 at King of DDT 2015 Tokyo in a three-way match against the champion Kudo and Yasu Urano.

[7] He led the #OhkaEmpire stable, in which he wrestled alongside Danshoku Dino and Super Sasadango Machine, members with which he hosted a custom-made show, the DDT #OhkaEmpire Produce "Muscle Mates 2015" on November 17, where he worked with personalities such as Hiroshi Tanahashi, Yohei Komatsu and Harashima.

On March 18, 2017, Ohka defeated Shiori Asahi to win the Independent Junior Heavyweight Championship at K-DOJO Club-K Super In Blue Field, event promoted by Kaientai Dojo.

[12] He worked a match for New Japan Pro-Wrestling at the NJPW NEVER.6 ~ Road To The Super Junior Tournament on April 16, 2011 where he teamed up with Kaji Tomato, Marines Mask and Osamu Namiguchi in a losing effort to Gedo, Jado, Tetsuya Naito and Yujiro Takahashi of Chaos.