Tōtōmi Province was a province of Japan in the area of Japan that is today western Shizuoka Prefecture. Tōtōmi bordered on Mikawa, Suruga and Shinano Provinces. Its abbreviated form name was Enshū (遠州). The origin of its name is the old name of Lake Hamana.

Kakegawa Castle is a hirayama-style Japanese castle. It was the seat of various fudai daimyō clans who ruled over Kakegawa Domain, Tōtōmi Province, in what is now central Kakegawa, Shizuoka Prefecture, Japan.