This is an old-style Kotokoname large katakuchi bowl from the Heian and Kamakura periods with a foot. Katakuchibachi from Tokoname did not function as a mortar, but was used for multiple purposes, such as cooking utensils and pot lids for sutra cylinder containers. The withered and tense appearance of the Heian period. It's cool to use this product as a brazier.
