Michikazu Sakai - Oribe ware chawan (Matcha bowl)Earthenware 120xH75 mm Made in Kagawa, Japan About product Oribe ware bowl by wood fired kilns Users Guide Before first time use: Clean your product with water, and afterward dry it. Clean after usage: Hand wash only After washing the product, dry it carefully, and make sure that all the moisture is out. Keep it in a dry place. Coffee or Tea stains can be removed by leaving a bit of baking soda or dishwashing detergent for a night in the product.