Sōgen-ji

() was a Buddhist temple located in the Tomari neighborhood of the city of Naha, Okinawa Prefecture, Japan. It belonged to the Rinzai school sect of Japanese Zen. The temple's full name is (). It was the Royal ancestral shrine of the kings of Second Shō dynasty of the Ryūkyū Kingdom. The site of the temple was designated a National Historic Site of Japan in 2025.

==Overview== The founding date of Sōgen-ji| is said to be either during the Xuande era (1426-1435) or the Chenghua era (1465-1487), however, based on the inscription on the "Sogenji Dismount Monument" located in front of the temple gate it was completed in 1527, the 6th year of the Jiajing era. Based on the inscription on the stone monument located in front of the temple gate, the temple was founded in 1527, shortly after King Shō Sei ascended to the throne. Prior to the investiture ceremony for the new king held at Shuri Castle, Chinese envoys held the "San'o Yusai" ceremony to console the spirit of the former king. The temple was complex of Chinese-style buildings, centered around the main temple. Anyone entering the temple grounds, including the king himself, had to dismount and enter the temple on foot out of respect for the prior sovereigns. The temple grounds were expanded at this time as well, with the construction of the massive stone gates and walls which remain today. The spirit tablets of the successive kings of the Ryūkyū Kingdom from Shunten to King Shō Tai were installed in the temple, establishing it as a royal ancestral shrine. Although the spirit tablets were installed at Sōgen-ji, the temple was not a royal mausoleum, as the graves of the kings was located at the a short distance from Shuri Castle. In 1699, Shō Shoku and Shō Kyū's spirit tablet were moved to Tennō-ji, Shō I's was moved to Tenkai-ji.