Extension of ring-width pattern on Japanese hemlocks(Tsuga sp.) for dating early modern Japanese wooden buildings, and estimate of the place of origin.

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This project intended to accumulate and improve ring-width data of Japanese hemlocks (Tsuga sp.) on the timbers of historical wooden buildings and the contemporary woods around western Japan for establishing a standardized mean pattern available to early modern wooden buildings made of this species. At the same time, ways to estimate the place of origin of such old timbers by ring-width were also explored. As a result, pattern linking between the floating old timber and the current wood remained unresolved, but according to context included comparison between old timbers from Shikoku and Kinki, it suggested the possibility of practical presumption of the origin.