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The life of Shibukawa Shunkai: first official astronomer of the Tokugawa Shogunate: https://t.co/XR9ka9JgeJ #ndldigital https://t.co/F09YXAVw81
These tools were used to make Japan's first indigenous calendar. Read more to find out: https://t.co/XR9ka9JgeJ #ndldigital https://t.co/KW1m3iR78T
Struggles of an astronomer in creating Japan's first indigenous calendar in the 17c: https://t.co/XR9ka9JgeJ #ndldigital https://t.co/tufNo7G59H
The life of Shibukawa Shunkai: first official astronomer of the Tokugawa Shogunate: https://t.co/XR9kaa0jgJ #ndldigital https://t.co/TwiraafeKz
Struggles of an astronomer in creating Japan's first indigenous calendar in the 17c: https://t.co/XR9kaa0jgJ #ndldigital https://t.co/auA75ne93n
The life of Shibukawa Shunkai: first official astronomer of the Tokugawa Shogunate: https://t.co/XR9kaa0jgJ #ndldigital https://t.co/KjfpzSGpUD
These tools were used to make Japan's first indigenous calendar. Read more to find out: https://t.co/XR9kaa0jgJ #ndldigital https://t.co/GcKDHSG7nb

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