Spectroscopic and chemical analyses, for the most part previously published, are given for 23 Chinese and Japanese glasses. Lead isotope ratios are presented for 40 samples of glass, metallic lead, pigments and ores. It is shown that these data are useful for classifying East Asian glasses. A clearly-defined Nara' type of lead has emerged, which falls within the range of isotope ratios found for Japanese lead ores. Other glasses from Japan, differing considerably from the Nara type, are believed, in at least some cases, to be of Chinese origin. Early Chinese glasses yield lead isotope ratios of two markedly different types. There is only a partial correlation for Chinese glass between isotope ratio and barium oxide content.