著者

冨田 良雄 尾上 瑞宝 下出 祐太郎

出版者

近世京都学会

雑誌

近世京都 (ISSN:21886709)

巻号頁・発行日

no.3, pp.1-17, 2019 (Released:2020-09-02)

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We investigated the two long ikanbari telescopes, one is a private collection in Nagasaki and another is owned by the Kobe city museum, with special interest on the traditional technique of ikanbari telescope tube. As a result, both telescopes were produced by Hirai Ikan Sen'oshi family, and presented to the eighth shogun Yoshimune Tokugawa as a pair of telescope. Those two telescopes are the frst astronomical telescope produced in Japan.