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 Emperor Chōkei (長慶天皇 Chōkei-tennō?). The Northern court emperor in Kyoto was Emperor Go-En'yū (後円融天皇 Go-En'yū-tennō?).
During the Meiji period, an Imperial decree dated March 3, 1911 established that the legitimate reigning monarchs of this period were the direct descendants of Emperor Go-Daigo through Emperor Go-Murakami, whose Southern Court (南朝 nanchō?) had been established in exile in Yoshino, near Nara.