From 1028 to 1031 (Chōgen 1–4), Taira no Tadatsune, a powerful figure in the three Bōsō provinces (Kazusa, Shimōsa, and Awa), rose up against provincial governor rule. The first court commander, Taira no Naokata, failed to suppress him over three years; when Minamoto no Yorinobu, governor of Kai, took command, Tadatsune surrendered without a fight. The rebellion's resolution became the starting point for Kawachi Genji expansion into eastern Japan and the rise of the warrior class.

GenpeiRebellion

4th month, 9th day – 5th month, 26th day, Jishō 4 (1180)

Prince Mochihito's Uprising of 1180: The Edict and the Battle of Uji Bridge

The 1180 attempt by Prince Mochihito, a son of Retired Emperor Go-Shirakawa, and Minamoto no Yorimasa to overthrow the Taira. The plot was discovered, and after fleeing to Onjō-ji both leaders were killed following the bridge battle at Uji. The uprising failed, but his edict spurred Minamoto risings elsewhere.

HeianRebellion

Tengyō 2–4 (939–941)

Fujiwara no Sumitomo's Rebellion: The Pirate King's Blade and the Collapse of the Ritsuryō System

Tengyō 2–4 (939–941): a rebellion launched by Fujiwara no Sumitomo, a former kokushi (provincial official) of Iyo Province, who led pirate groups of the Seto Inland Sea. Together with the contemporaneous Taira no Masakado Rebellion (the eastern component of the Jōhei-Tengyō Disturbances), it symbolizes the weakening of the ritsuryō state and is emblematic of a transitional period in which provincial warrior bands and swords burst onto the main stage of history.