Emperor Go-Saga (後嵯峨天皇, Go-Saga-tennō; 1 April 1220 – 17 March 1272) was the 88th emperor of Japan, according to the traditional order of succession. This reign spanned the years 1242 through 1246.
This 13th-century sovereign was named after the 9th-century Emperor Saga and go- (後), translates literally as "later"; and thus, he is sometimes called the "Later Emperor Saga". The Japanese word go has also been translated to mean the second one; and in some older sources, this emperor may be identified as Saga, the second, or as Saga II.
Before his ascension to the Chrysanthemum Throne, his personal name (his imina) was Kunihito-shinnō (邦仁親王).
He was the second son of Emperor Tsuchimikado, and second cousin of his predecessor Emperor Shijō.
Empress: Saionji (Fujiwara) no Yoshi-ko (西園寺（藤原）姞子) Later Ōmiya-in (大宮院), Saionji Saneuji’s daughter
Fourth son: Imperial Prince Hisahito (久仁親王) later Emperor Go-Fukakusa
First daughter: Imperial Princess Osako (綜子内親王; 1247-1269）later Gekkamon-in (月華門院)
Seventh son: Imperial Prince Tsunehito (恒仁親王) later Emperor Kameyama
Eleventh son: Imperial Prince Masataka (雅尊親王; 1254-1256)
Thirteenth son: Imperial Prince Sadayoshi (貞良親王; 1256-1260)
Consort: Imperial Princess Taishi (体子内親王; 1231-1302) later Shinsenmon’in (神仙門院), Emperor Go-Horikawa’s daughter
Court Lady: Saionji (Fujiwara) Kimiko (西園寺（藤原）公子), Saionji Kintsune's daughter
Son: Imperial Prince Priest jijo (慈助法親王; 1254-1295）
Daughter: Imperial Princess Etsuko (悦子内親王; 1260-1332）later Enseimon’in (延政門院)
Lady-in-waiting: Taira no Muneko (平棟子), Taira no Munemoto's daughter
Third son: Imperial Prince Munetaka (宗尊親王)
Handmaid?: Fujiwara Hiroko (藤原博子), Fujiwara Takatoki's daughter
Eighth son: Imperial Prince Priest Kakujo (覚助法親王; 1247-1336)