- Died: 1456
- Other Names: 後崇光太上天皇 (Gosukô dajô tennô), 後崇光院 (Gosukô-in)
- Japanese: 伏見宮貞成親王 (Fushimi no miya Sadanari Shinnô)
Prince Gosukô, also known as Prince Fushimi-no-miya Sadanari, was the third head of the Fushimi-no-miya house. He was a son of Fushimi-no-miya Yoshihito and grandson of Emperor Sukô. His own eldest son (Prince Hikohito), in turn, took the throne as Emperor Go-Hanazono.
Though never emperor himself, he enjoyed the title of dajô tennô (retired emperor).
He is known for a number of writings, including Kanmon gyoki, Chin'yôki, and Sagyoku wakashû.
- "Gosukô dajô tennô," Bijutsu jinmei jiten, Shibunkaku.