A Shiraiwa ware jar fired in the late Edo period. The unique body, with a ring belt at the joint, is layered with iron and Namako (sea cucumber) glaze. The glaze flows over the dent, creating a mesmerizing cascade effect, blending into the deep iron tones below.

Shiraiwa ware opened in Shiraiwa Village (now Shiraiwa, Kakunodate-machi, Akita Prefecture) in 1771. It was founded by Matsumoto Unshichi, who moved from Ohori-Soma but left shortly thereafter, and his apprentice got the pottery business on track. The distinctive style, which makes full use of sea cucumber glaze, is powerful and reflects the bitter cold climate of Akita. It is said to have had a significant influence on the subsequent Terauchi ware and Naraoka ware. This piece was fired as an Ohaguro jar, and its unique shape, inspired by a Furo-gama (brazier jar), and the ethereal colour of the glaze are its attractions.

There is a chip on the rim. There are no other noticeable defects besides kiln damages, and the condition is excellent.