He portrays Sokichi Narumi/Kamen Rider Skull for the Kamen Rider W franchise, and sung "Nobody's Perfect," Skull's theme.
He made his acting debut in the television series Kamen Rider W as Philip.
In 2009, Asuka joined the cast of Kamen Rider W as Wakana Sonozaki.
Easy Rider | Kamen Rider | H. Rider Haggard | Nick Kamen | Dean Kamen | Pale Rider | Michael Kamen | Kamen Rider Decade | Kamen Rider 1 | rider | Neon Rider | Whale Rider | The Black Rider | Rider-Waite tarot deck | Red Rider | Midnight Rider | Kamen Rider W | Kamen Rider × Super Sentai: Super Hero Taisen | Kamen Rider Agito | Kamen Bryag | Jack Kamen | Ghost Rider | Alex Rider | Young rider classification in the Tour de France | Steve Rider | Rider (legislation) | Phantom (Kamen Rider) | Peter Collins (speedway rider) | Kamen Rider ZO | Kamen Rider Kiva: King of the Castle in the Demon World |