Tanikawa graduated from Nihon University College of Law and worked as a journalist and executive at various sports media, most notably puroresu. After K-1 founder Kazuyoshi Ishii's resignation, Tanikawa became the president of the newly founded Fighting and Entertainment Group that was established in September 2003 to encompass K-1 as well as subsidiary mixed martial arts and puroresu promotions.
In January 2011, Tanikawa told that current conditions indicate Fighting and Entertainment Group was likely to end. On April 5, 2012, Tanikawa announced that he resigned from his position in K-1, which was for the most part sold to the real estate firm Barbizon Co. Ltd. on July 28, 2011. On May 16, 2012, Tanikawa officially declared the bankruptcy of FEG.
- People Bank - 谷川貞治 Archived 2012-03-24 at Archive.is
- Sadaharu Tanigawa: The Current Course Is That FEG Will Die
- Sports Navi Yahoo Japan - 谷川氏、新イベント会社設立 「総合、プロレスも手がける」 Archived 2012-09-30 at the Wayback Machine.
- So, Apparently "FEG Will Die" According to Tanikawa
- FEG谷川代表がK-1との決別を宣言 新たな格闘技イベント立ち上げへ Archived 2012-04-08 at the Wayback Machine.
- "K-1 Sold to Japanese Real Estate Firm Barbizon", July 28, 2011, MMAFighting
- FEG's bankruptcy, May 17, 2012, Muay Thai TV