Futenma Shrine Cave, Sacred limestone cave in Futenma, Japan.

Futenma Shrine Cave is a solutional cave about 280 meters long whose entrance lies inside Futenma Shrine in Ginowan, Okinawa. Around 50 meters of its passages are open to visitors, who can see the limestone forms shaped by water.

The shrine is said to have begun when Ryukyuan ancient Shinto deities were enshrined inside this cave. From the latter half of the early Okinawan Shell Mound period onward, many artifacts were excavated in the cave. It was designated a natural monument of Ginowan City on 1 August 1991.

The cave is part of a shrine that holds deep meaning for the local community as a space for spiritual practice and connection. People visit to pray and participate in customs that reflect how nature and faith are intertwined in Ryukyuan tradition.

About 50 m of the 280 m cave is open to visitors, and entry is free; there are no guided tours, so you walk through on your own. The cave entrance lies inside the grounds of Futenma Shrine in Ginowan, Okinawa. The passage is uneven and the air underground is cool, so wear shoes with grip and bring a light layer.

The cave is tied to two legends: the goddess Futenma and the hermit Futenma Sennin. Excavations have yielded many artefacts from the latter half of the early Okinawan shell-mound period onward, showing the cave was used long before the shrine. It was designated a natural monument of Ginowan City on 1 August 1991.