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.
| Actor | Role |
|---|---|
 Aoi MiyazakiEn Murase | En Murase |
 Junichi OkadaSantetsu Yasui | Santetsu Yasui |
 Kiichi NakaiMitsukuni Mito | Mitsukuni Mito |
 Ryuta SatoGieki Murase | Gieki Murase |
 Takashi SasanoDennai Tatsube | Dennai Tatsube |
 Shota SometaniTenchi Meisatsu | Tenchi Meisatsu |