| 6 | 37.50 | 5th Kanagawa Open | B | 12-Jan to 13-Jan-2008 | |
| 1 | 112.50 | Kinki Open (4th) | B | 10-Feb to 11-Feb-2008 | $81 |
| 8 | 52.50 | 19th Tokyo Open | B | 26-Apr to 27-Apr-2008 | |
| 2 | 120.00 | 8th Minamisoma Open | B | 04-May to 05-May-2008 | $36 |
| 1 | 60.00 | 3rd Kiyosato Open | B | 17-May to 18-May-2008 | $54 |
| 22 | 900.00 | 2008 Japan Open (150 Class) | M | 12-Jun to 14-Jun-2008 | $236 |
| 4 | 82.50 | 10th Nihon Open | B | 05-Jul to 06-Jul-2008 | |
| 7 | 22.50 | 8th Tohoku Open | B | 09-Aug to 10-Aug-2008 | |
| 5 | 105.00 | 12th Kanto Open | B | 23-Aug to 24-Aug-2008 | |
| 5 | 97.50 | 8th Chubu Open | B | 06-Sep to 07-Sep-2008 | |
| 5 | 82.50 | 3rd Michinoku Open | B | 12-Oct to 13-Oct-2008 | |
| 3 | 135.00 | 20th National Championships | B | 22-Nov to 23-Nov-2008 | |
| 4 | 67.50 | 16th Tokai Open | B | 06-Dec to 07-Dec-2008 | |
