What is "tenju"

Tenju (天授) was a Japanese era name (年号, nengō, lit. year name) of the Southern Court during the Era of Northern and Southern Courts after Bunchū and before Kōwa. This period spanned the years from May 1375 to February 1381. The Southern Court emperor in Yoshino during this time-frame was . The Northern court emperor in Kyoto was .