Shiba Takatsune (1305–1367) expanded the role of the clan when he sided with Ashikaga Takauji (1305–1358) in the skirmishes against the Emperor Go-Daigo in 1335. With the establishment of the Ashikaga shogunate Takauji awarded the office of shugo governor of Echizen and Wakasa provinces to Takatsune.
Shiba Yoshimasa (1350–1410), son of Takatsune, held the office of kanrei from 1379 to 1397 during the Ashikaga shogunate. The office of kanrei was continued by his son Shiba Yoshishige (1371 – 1418) and grandson Shiba Yoshiatsu (1397 – 1434).
The Shiba fell into factional dispute by the mid-1400s and were unable to make a transition to Sengoku-daimyo and lost Echizen to the Asakura in the 1470s. The feud within the Shiba clan and with other clans was one cause of the Ōnin War (1467–1477). The succession process was enacted by Asakura Toshikage, who took their power via usurpation. By the year 1550 the Shiba were represented by Shiba Yoshimune of Owari Province, a figurehead behind which the Iwakura branch of the Oda clan had ruled. His domain was Kiyosu Castle.
- Papinot, Jacques Edmond Joseph. (1906). Dictionnaire d’histoire et de géographie du Japon; Papinot, (2003). ("Shiba," Nobiliare du Japon, p. 54 [PDF 58 of 80]; retrieved 2013-05-03.
- "Shiba family". Encyclopedia of Japan. Tokyo: Shogakukan. 2012. OCLC 56431036. Retrieved 2012-08-29.
- Nussbaum, Louis-Frédéric. (2005). "Shiba Yoshimasa" in Japan Encyclopedia, p. 850.
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