However, in addition, the shogunate brought over Harumi SHIBUKAWA, who hit the business as a subordinate of Yasutomi TSUCHIMIKADO in the making of the Jokyo calendar, to be a Tenmonkata (officer in charge of astronomy)and plundered even the authority of calendar amendment.
しかし、更に貞享暦制定の際に土御門泰福の配下として実務にあたった渋川春海を天文方に引き入れて改暦権限まで奪い取った。