Ennosuke Ichikawa IV
A chronicle of the life of Yasui Santetsu, a 17th century master of go who turned his attention to astronomy and created a new calendar for Japan. Based on the life of Santetsu Yasui (December 27, 1639-November 1, 1715), appointed as the first official astronomer in the Edo Period and would go on to create the Jokyo calendar at the imperial request.
During the reign of the eighth shogun of the Tokugawa shogunate, the Yunagaya Domain in the Tohoku region is a small han. But at the han, there is a gold mine. Suddenly, Masaatsu Naito of Yunagaya Domain receives an order to perform Sankin-kotai within 5 days. Sankin-kotai is a custom that requires the daimyo to visit the shogun in Edo. Unfortunately, the time needed to visit the shogun in Edo for Masaatsu Naito is 8 days. Masaatsu Naito also learns he received the order because a high ranking government official wants the gold mine. Also, the expense for Sankin-kotai is high and the Yunagaya Domain is such a small han that it seems impossible to complete. Nevertheless, Masaatsu Naito begins an unexpected operation to complete Sankin-kotai in 5 days.