This is a set of Hagi-yaki (Hagi ware) kumidashi (small, handleless teacups). It is inscribed with "Tenryu-zo," indicating that it was made by the Tenryu kiln. Kumidashi are small teacups without handles, used for serving tea to guests. They are usually sold in sets of five and are valued for guest use. Hagi-yaki is characterized by "nana-bake" (seven transformations), meaning that the color and texture change with use, allowing you to enjoy the aging process. Thank you for viewing.