The authors determined lead isotope ratios,₂₀₆Pb/₂₀₄Pb, ₂₀₇Pb/₂₀₆Pb and ₂₀₈Pb/₂₀₆Pb of two small fragments which had been regarded as fragments of a raised triangle rim mirror with a design of divinities and animals, excavated from the Takeshima tumulus. They compared the ratios obtained with those of the mirror in question and concluded that these fragments were of other mirrors, not of the raised triangle rim mirror excavated from the same tumulus. -- AATA