蠟型鋳造(ろうがたちゅうぞう)rōgata chūzō
蜜蠟(みつろう)で原型を成形し、これを土で覆い、外から炭火で熱して蠟を抜き、できた空間に溶銅を流し込む鋳造法。
第69回 正倉院展、2017年
Lost wax casting
The basic form is sculpted in wax and a clay or earth cast made around it. Intense fire from outside heats the wax till it melts. Molten copper is pored into the resultant void to cast an object.
74th Annual Exhibition of Shōsō-in Treasures, 2022