However, Harumi SHIBUKAWA who was virtually the head of kaireki work was nominated by the Edo bakufu and to become a Tenmonkata (astronomer appointed by the bakufu), the center of kaireki work had been moved to Edo.
だが、一方で改暦の実質上の中心であった渋川晴海が江戸幕府に召されて天文方に入ったために改暦の中心が江戸に移る結果を招いた。