This is a rare Wan type chawan, around 400 years old in shape close to a tenmoku tea bowl. It is thrown on a wheel from coarse, unrefined iron bearing clay.
The grey ash glaze has been painted on the body with a straw brush as seen on Korean hakeme chawan. A stone in the wall has exploded in the fire - a very sought after effect ( see pic number 2 ), giving this type of Karatsu bowls its name: ishihaze (exploding stone). At the rim is a repair in silver lacquer ( refer to pic number 2 )
The Momoyama Period tea bowl has a new unmarked wooden box (kiribako) of good quality.
Size: 7,5 cm height x 12,7 cm diameter.