Sefa-utaki, Sacred site (utaki) in Chinen, Nanjo, Okinawa, Japan

Sefa-utaki is a sacred site on the Chinen Peninsula where natural rock formations create a triangular opening between a sloping grey wall and an upright fractured face, leading to a shadowed passage with a flat floor. Beyond the opening sits a low stone slab. The grounds contain several worship places named after facilities in Shuri Castle, with the innermost Sangui holding three worship spots.

The site developed from natural rock and cave formations that people have long treated as sacred. In the early 16th century, Okinawa's ruling government formally recognized it as a primary center for religious ceremonies.

The name Sefa-utaki means "the greatest utaki", from sēfa, "highest rank"; its formal divine name is Kimi Ga Utaki, Omo Ga Utaki No Ibi. The grounds repeat names of Shuri Castle facilities, and at Sangui the top-ranked worship site Chō-no-hana is where Amamikyu is said to descend via a kuba tree. The Kikoe-ōgimi's inauguration rite, Oaraori, was held here.

The site is accessible with pathways connecting the different levels, though sturdy footwear is recommended for walking. Some sections feature stairs and exposed roots, and surfaces become slippery after rain.

The site holds fifteen incense burners, not six. In April 2021 the city of Nanjō announced that one of them had gone missing and been replaced with another stone; it was later recovered and a suspect arrested for theft. The episode led to the inner Sangui area being closed to visitors.