Using mat glaze for the potter's clay which is full of feeel of a material in soil so tha the texture of Japanese craftmanship is felt in "hiiro". The shite glaze means cloud, the blue glaze means sky, the yellow glaze means moon, those present the three degrees of perception to feel scenery of sky. The appearance to match with nature ing the feel of a material of "Japanese Craft" in the space of the tea brings about rich time.