Kujō Yoritsugu (九条 頼嗣, 17 December 1239 – 14 October 1256; r. 1244–1252), also known as Fujiwara no Yoritsugu (藤原 頼嗣), was the fifth shōgun of the Kamakura shogunate of Japan. His father was the 4th Kamakura shōgun, Kujō Yoritsune.^[1]

The Kujō family was one of the five branches of the historically powerful Fujiwara clan of imperial courtiers.

• Father: Kujō Yoritsune
• Mother: Omiya no Kata
• Wife: Hiwadahime (1230–1247)

• 1244 (Kangen 2): In the spring of this year, a number of extraordinary phenomena in the skies over Kamakura troubled Yoritsugu's father Yoritsune deeply.^{[2][better source needed]}
• 1244 (Kangen 2, 4th month): Yoritsugu had his coming-of-age ceremonies at age 6. In the same month, his father asked Emperor Go-Saga for permission to give up his responsibilities as shōgun in favor of Yoritsugu.^{[2][better source needed]}
• 1245 (Kangen 3, 7th month): Yoritsune shaved his head and became a Buddhist priest.^{[2][better source needed]}
• 1246 (Kangen 4, 7th month): Yoritsugu married the sister of Hōjō Tsunetoki. He was seven, and she was sixteen.^{[2][better source needed]}
• 1 September 1256 (Kōgen 1, 11th day of the 8th month): Yoritsugu's father dies at the age of 38.^{[3][better source needed]}
• 14 October 1256 (Kōgen 1, 25th day of the 9th month): Yoritsugu dies at the age of 16.^{[3][better source needed]}

The years in which Yoritsugu was shogun are more specifically identified by more than one era name or nengō.

• Kangen (1243–1247)
• Hōji (1247–1249)
• Kenchō (1249–1257)

• Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 58053128
• Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691.