The box says "Munakata-yaki Ryotani-gama," but I'm a novice, so I don't know much about it. Please check the photos. It's a teacup with a calm color. There are no markings, but it's unclear if the three lines on the bottom are the kiln's mark. It's unused but has been stored for a long time. With wooden box Features: Handmade texture and unique glaze Height: Approximately 8 cm Diameter: Approximately 13 cm Please also see my profile.