| Tournament information | |
|---|---|
| Location | Hamamatsu, Shizuoka, Japan |
| Established | 2011 |
| Course(s) | Grandee Hamanako Golf Club |
| Par | 72 |
| Length | 7,054 yards (6,450 m) |
| Tour(s) | Japan Golf Tour |
| Format | Stroke play |
| Prize fund | ¥100,000,000 |
| Month played | May |
| Final year | 2012 |
| Tournament record score | |
| Aggregate | 268 Ryo Ishikawa (2011) 268 Masanori Kobayashi (2011) |
| To par | −20 as above |
| Final champion | |
 Jay Choi | |
| Location map | |
  Grandee Hamanako GC Location in Japan  Grandee Hamanako GC Location in the Shizuoka Prefecture | |
The Totoumi Hamamatsu Open (とおとうみ浜松オープン, Tōtoumi hamamatsu ōpun) was a professional golf tournament on the Japan Golf Tour in 2011 and 2012. It was played at the Grandee Hamanako Golf Club in Hamamatsu, Shizuoka Prefecture. In 2012, the purse was ¥100,000,000 with ¥20,000,000 going to the winner.