After the graduation, he hit on the development of professional wrestling games to make use of 3D graphics performance of PlayStation thus his company's Toukon Retsuden, put on the market from Tomy in 1995.

In 2005, Taniguchi bought controlling 51% stake of slumping New Japan Pro-Wrestling (which Tokonretuden was based on) as a white knight.

In 2008 Taniguchi competed in two rounds of the FIA World Touring Car Championship (WTCC) in a Honda Accord for the N. Technology team alongside regular driver James Thompson.

[1] After a break, Taniguchi returned to the WTCC in 2010 with Bamboo Engineering, racing in the final three events of the season in a Chevrolet Lacetti, previously driven by Harry Vaulkhard.

He joined Wiechers-Sport for the 2013 FIA WTCC Race of Japan to replace their regular driver Fredy Barth who had other commitments.