The Tarumi Saiō Tongū Site (垂水斎王頓宮跡, Tarumi Saiō tongū ato) is the location of a temporary palace erected in the Heian period in what is now the city of Kōka, Shiga Prefecture in the Kansai region of Japan.

[1] The Tarumi Saiō Tongū Site is located at the foot of a hill overlooking the Yokota River.

During the Heian period, the Saiō was an unmarried female member of the Japanese Imperial Family sent to serve as High Priestess at Ise Grand Shrine.

Up to 500 people would set out from Kyoto as a part of her retinue for the six-day-and-five-night journey.

From Kyoto, the procession travelled in an eastward direction, stopping at Seta, Kōka, Tarumi, Suzuka and Ichishi, and a "Tongū", or temporary accommodation for the Saiō was constructed at each location.