A Kogaratsu teabowl made in the Azuchi-Momoyama to the early Edo period (1590 to 1610s). It is fired with reduction baking and is regarded as Aokaratsu (Green Karatsu) in a subcategory of Muji-karastu. It shows a celadon-like colour, creating a beautiful vitrified glaze pool.

The ash glaze is used in most kilns in Kogaratsu and indicates various kiln effects depending on the ratio of feldspar and the firing condition. Still, this piece presents an outstanding greenish glaze with high transparency. It was probably excavated in the late Edo period and has been inherited under the name of “Shibugaki (astringent persimmon)”- a metaphor of immaturity that is considered a humble understatement by tea practitioners themselves. It has an expansive exposed base clay with antiquity, and repaired with the Maki-e lacquer work of the wave pattern on the rim tightens the entire appearance.

Some shaved parts on the foot should have occurred since the excavation and are already part of its feature. It fits in a box and an original old box lid with an inscription.