Shibukawa Shunkai
- 涩川春海（涩川春海，江户时代天文历学家，字春海，号新庐，姓先后为安井、保井，最后改为涩川）
Shibukawa Shunkai
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abstract:
was a Japanese scholar, go player and the first official astronomer appointed of the Edo period. He revised the Chinese lunisolar calendar at the imperial request, drawing up the Jōkyō calendar which was issued in 1684 during the Jōkyō era.
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