This is Banko-yaki ohitsu.
It has excellent water absorption and allows you to preserve rice deliciously without losing its flavour.
Banko-yaki (Banko-yaki, Banko-yaki) is a type of ceramics and pottery that uses petalite and has excellent heat resistance. It is classified as semi-porcelain (stoneware), which has properties between earthenware and porcelain.
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*The colour of the product may look slightly different depending on the condition of your computer and the brightness.