This is a set of Shikaoi-yaki pottery. It's also known as "Hidasuki," or "fire-tied," and is a type of pottery made without glaze, created by wrapping the pieces in rice straw before firing. I bought this a long time ago and have been storing it in a closet. It's old, but unused. The box has a vintage feel. I would appreciate it if you could understand and make use of it.