The ruins of old kilns were discovered when an athletic park was being constructed in Handa City, Aich Prefecture. They are considered to be the kilns used from the middle of the 12th to the early 13th centuries. Currently, 3 of the eight kilns are preserved in their original forms and displayed inside the preservation center in the park.

From their relatively small sizes, they are supposed to be used mainly for firing small vessels including bowls, which are called “Yamajawan” by locals. Yamajawan, literally meaning “a mountain bowl,” is a defected product that was thrown away around the kilns. When the mountains were cultivated by the people in later periods, they discovered a lot of pottery bowls and called them “Yamajawan.” There are supposed to have been thousands of kilns built in the mountains in Chita Peninsula.