| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2013: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2012: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2011: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Research Abstract |
It was shown for the first time to be able to identify the natural lacquer (Urushi) of the Japanese Islands and that from China by measuring the isotopic ratio (Sr-87/Sr-86) of the strontium contained in the Urushi paint film. Isotopic ratios of strontium in the soil where the lacquer tree grew were preserved in sap, and the isotopic fractionation (changes in isotope ratio) did not occur until the Urushi paint film was formed. The method is applicable to the film containing a red pigment. The Japanese lacquer of the archaeological site of the Late and the Final Jomon period was analyzed, and it was shown clearly for the first time that sap was extracted from the lacquer tree grown at the site. The diagenesis did not influence the isotopic ratios of relics that had been buried, and the method is possible to apply to archaeological remains.
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