Kuboya won four events on the Japan Golf Tour between 1997 and 2002, picking up two wins in each of those seasons.

Both of Kuboya's wins on the Japan Golf Tour in 2002 came in playoffs against seasoned campaigners.

He beat Shingo Katayama in extra holes at the Japan PGA Championship and another win against former Open champion Todd Hamilton at the Munsingwear Open KSB Cup.

Kuboya had a brief stint on the PGA Tour where he played a full season in 2003.

His best finish of the year was a T13 at the 84 Lumber Classic of Pennsylvania and he was not able to keep his card.