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.

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