Wikimedia Image Hamamatsu is a city in Japan and became a Sister City to Rochester in 1996. Like Rochester, the city sits on both a lake and river. Hamamatsu, population 813,369 (2009), was recently enlarged to encompass many surrounding communities. Its current population puts it slightly ahead of Monroe County.
Notes and References Rochester's Sister Cities on CityOfRochester.org Hamamatsu Wikipedia Article Japan Wikipedia Article Google Map