Emperor Sukō was the third of the Emperors of Northern Court during the Period of the Northern and Southern Courts in Japan. According to pre-Meiji scholars, his reign spanned the years from 1348 through 1351.

The Nanboku-chō period, spanning from 1336 to 1392, was a period that occurred during the formative years of the Muromachi (Ashikaga) shogunate of Japanese history.