Nij Mitsuhira, son of Nij Yasumichi, held regent positions kampaku (a sort of chief advisor for the Emperor, but was the title of both first secretary and regent who assists an adult Emperor) from 1653 to 1666 and sessh from 1663 to 1664.
He held regent positions kampaku from 1653 to 1663 and sessho from 1663 to 1664. 
