A Japanese Ko Tamba Tsubo, Edo period (1603-1868), early 17th century, potted in elegant ovoid form, with a Keishiki scenery (splash of ash glaze) to one side, and a good selection of other desirable scenic features appreciated in wabi tea aesthetic throughout the jar., 23 cm high, 21 cm diameter. Provenance: together with an old handwritten, signed and sealed letter from Katsura Matasaburo (1901-1986), authenticating the tsubo as Ko Tamba, from the very early Edo period. Katsura was acknowledged as a leading expert in Ko Bizen particularly, but also wrote on and had deep expertise on all of the six old kilns of Japan including Tamba.