Kakegawa is the kind of Japanese town that works best when you are already crossing Shizuoka and want a slower stop between bigger names. It was a post town on the old Tokaido road, then a castle town, and it still has enough of both identities to fill a good day without trying to be Kyoto.
The castle is the centrepiece. Its keep is a modern wooden reconstruction, but the Ninomaru Palace below it is the real prize: one of the few surviving castle palaces in Japan, with tatami rooms and formal spaces where the lord's household and officials worked. Around it are tea rooms, small museums, and streets that still feel tied to the castle hill.
Kakegawa also has an odd, cheerful second act at Kakegawa Kachoen, a bird and flower park where owls, penguins, cranes, and tropical birds are close enough to make even tired travellers smile. Add green tea from the surrounding Shizuoka fields and Kotonomama Hachimangu near the old road, and the town clears the day-trip test.