Nij Tadafusa, born November 16, 1496, was a Japanese kugy (court noble) of the Muromachi period who held a regent position kampaku (which was the title of a regent who assists an adult Emperor) two times from 1518 to 1525 and from 1534 to 1536.
In Japan, Sessho () was a title given to a regent who was named to act on behalf of either a child Emperor before his coming of age, or an empress regnant. 
