He competed in the JGTC until the 2000 season and now works as team manager for the Super GT division of the Toyota Team TOM'S and also runs a racing school at Fuji Speedway. In 1998, Sekiya also appeared in a TV commercial in Japan driving a JZA80 Supra promoting its handling package. Sekiya retired from professional motorsports in October 2000 and is now involved in team management.
Sekiya's involvement with the JGTC spanned from the start of the 1990s until the end of the 2000 season, after which he shifted his focus to managing Toyota Team TOM'S' Super GT division. He also established a racing school at Fuji Speedway and made appearances in Japanese TV commercials, including one in 1998 where he showcased the handling capabilities of the JZA80 Supra. Sekiya officially retired from professional motorsports in October 2000 and is now involved in team management.