Ninomiya Tile Kiln ruins (二ノ宮窯跡, Ninomiya kama ato) is an archaeological site consisting of the remains of two Nara period kilns located in what is now the Takase neighborhood of the city of Mitoyo, Kagawa Prefecture on the island of Shikoku, Japan.

[1] The use of tiled roofs, which was a symbol of continental culture and the advanced state of the central administration, spread during the Asuka and Nara period to Buddhist temples and regional administrative centers.

This kiln site was built from the late Heian period to the Kamakura period, and consists of the ruin of two kilns, one of which has an elliptical body and a firing port facing north.

It is a noborigama climbing kiln with several vein-shaped fire grooves on the bottom and a mounting base on which roof tiles are placed.

The site is about 20 minutes by car from the JR Shikoku Yosan Line Takase Station.