The Shirasuka-juku, located in what is now Kosai, Shizuoka, was the thirty-second of the of the fifty-three stations of the Tokaido. During the Edo Period, it was the westernmost post station of Totomi Province.
The Hamana-ko in Shizuoka is Japan’s tenth largest lake by area, spanning the boundaries of Hamamatsu City and Kosai City. It is a commercial source of cultivated Japanese eel, nori, oysters, and Chinese soft-shelled turtles. It has been developed as a resort area, with boating as a feature.