Yodo Castle, Japanese castle in Fushimi-ku, Kyoto, Japan

Yodo Castle is a Japanese castle in Fushimi-ku, Kyoto, whose stone walls and inner moat remain at the meeting point of the Uji and Katsura rivers. The remains show steep ramps built from stacked stones and water channels that surround the site and controlled access.

Matsudaira Sadatsuna built the castle in 1623 under orders from Tokugawa Hidetada, reusing materials from the former Fushimi Castle. The site was established in the early Edo period and served as a base for the shogunate in the Kyoto region.

Yodo was already a river port called Yodotsu in antiquity, where tribute goods and seafood from western Japan were unloaded for the capital. The castle's moats and the surrounding rivers gave it the nickname ukijiro, "floating castle". A song recorded in the Edo period ran: "The waterwheels of Yodo's rapids — for whom do they turn, round and round?"

The site lies about four minutes on foot from Yodo Station on the Keihan line and is easy to reach by walking. The ruins are open to the public and sit in a quiet neighborhood along the river.

Two large waterwheels, each about 16 meters wide (9 ken), stood on the west and north sides of the castle. They are thought to have drawn water for the ni-no-maru living quarters and the garden pond of the western enclosure. A contemporary verse ran: "The waterwheels of Yodo's river rapids, for whom do they turn and turn?"