Surface-coating greenish material of "Haniwa" from Ishiya Kofun in Matsue City, Shimane prefecture, were determined by electron probe microanalyzer.
It has K_2O content from 6.56 to 4.73, FeO and MgO content are from 21.17 to 16.60 and 5.40 to 3.63, respectively. From chemical point of view, this greenish material are seemed to be celadonite or celadonitic mineral.