Tama-u-dun (also Tamaudun) is a limestone mausoleum that houses the remains of members of the Sho En dynasty of the Kingdom of Ryukyu. It is located in Shuri, roughly 200 meters from the Shureimon.

Tama-u-dun was built in 1501 (Koji 14) by order of King Sho Shin, who wanted to the remains of his father (King Sho En) closer to Shuri Castle. As successive generations passed away, their remains were also placed here.

The total area of the site of Tama-u-dun spans 2,442 square meters and is enclosed by two-meter high walls hewn from Ryukyuan limestone. Visitors enter through a gate into a rectangular outer courtyard covered with coral sand. After passing through another gate, guests find themselves in the inner courtyard (also covered with coral sand) and facing the large limestone crypts.