Used white crucible for melting glass raw material in the furnace, as an artisan-use product of Okumura Rutsubo Seizosho, K.K. in Osaka, Japan (1912: Established), called ‘Japan-tsubo’ (lit. Japanese jar) commonly as the jargon among the Japanese glass-blowers. Similar unintentional expression of unexpected effect of high-fired unglazed stoneware (‘yakishime’), but more elegant, more delicate, and more calm “wabi” landscape with such white base texture. Stuck its solidified glass material in inside bottom as seen. (so, weighted for its glass part) Carved trademark on the upper surface. approx. H 22.5 cm (8.85in), D 17 cm (6.69in)
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