However, when the tenmonkata (astronomer appointed by bakufu) of Edo bakufu led and succeeded in changing the calendar to Jokyo reki (Jokyo calendar), the bakufu (tenmongata) and the Imperial Court (the Tsuchimikado family) came to oppose to each other over the power for kaireki (changing of calendar).
だが、江戸幕府天文方が主導した改暦（貞享暦）に成功すると、改暦の権限を巡って幕府（天文方）と朝廷（土御門家）の間で対立が生じるようになった。