X-ray examinations have revealed that, although the 'keshiki' (literally meaning landscape, this term describes the unforeseen changes such as warping, spots etc in the ceramic) and other surface features that appear to be glaze are in fact repairs using lacquer.
釉と見られる景色等の表面を覆う部分はほぼ漆による修復であると、X線調査で判明している。