Fujiwara no Morosuke (藤原 師輔, January 11, 909 – May 31, 960), also known as Kujō-dono or Bōjō-udaijin, was a Japanese statesman, courtier and politician during the middle Heian period.

After this Morosuke was promoted to dainagon, made a general in the imperial guard (右近衛大将), and bestowed the junior second rank (従二位).

As the maternal grandfather of the crown prince, Morosuke and his cohorts were able to lead the court by Murakami's side for about ten years.

Because he had affairs with and then married three different imperial princesses, Morosuke may have been the model for a character in the Utsubo Monogatari, the ultimate lecher, Fujiwara no Kanemasa.

[3] In 960 Morosuke was laid out by illness, and according to the customs of the day attempted to cut his hair and take the tonsure, but Emperor Murakami sent a messenger to dissuade him.

Morosuke and his older brother Saneyori, both educated by Fujiwara no Tadahira, each formed their own school of the practices and traditions of the court.

His personal diary Kyūreki (九暦) and the dying instructions he left for his descendants, Kujō-dono Ikai (九条殿遺誡), are also preserved.