-Made-in-Japan mino-yaki cup. -The item follows the New Food Sanitation Law of Japan and is safe. -The item is safe to use with microwaves and dishwashers. -Do not use the item with direct fire/oven as it may damage the item and/or its printed design. Ao No Kanata No Four Rhythm - Mashiro Udon Japanese Tea Cup - Play-Asia.com-The use of scrubbing tools and/or powder detergents may damage the item.