This is a "Yamachawan" (mountain tea bowl) made from the late Heian period to the early Kamakura period (12th-13th centuries). The crack seen on the side of the foot of this item is not damage that occurred after shaping, but rather a kiln crack that occurred during firing. It is not a crack that occurred later. Such scenery resulting from firing is not uncommon in medieval ceramics, and among tea ceremony enthusiasts, it has been regarded as an element that evokes a sense of age. Furthermore, from the rim to the body, naturally melted ash remains in a greenish, glass-like state, creating a beautiful, unadorned appearance. This expression, born of chance rather than intentional glazing, is also one of the major charms of this bowl. The wheel marks, uneven firing, the texture of the clay, and the distortion of the form all possess elements characteristic of medieval Yamachawan, and in the tea ceremony, it can be enjoyed as an example of "wabi" and "suki" aesthetics. 【Condition】 ・Kiln crack occurred during firing (not a later damage) ・No chips ・No repairs ・Age-appropriate signs of use and wear ※Please purchase only if you understand the character of antique tea utensils and old ceramics. 【Size】 Diameter: approx. 16.2cm wide, 13.5cm deep, Height: 7cm Foot: 6.5cm Weight: 315g 【Period】 Late Heian period to early Kamakura period (estimated)