- 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
- vol.3, pp.1-17, 2019 (Released:2023-07-26)
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.