Change of aristocratic rule
In the 10th and 11th centuries the old tax system broke down. Land was held as shoen (tax-free estates) by nobles and temples, and the court sent governors (zuryo) who collected what they could and often kept some. Money and power flowed to a few families. In 1086 the retired emperor Shirakawa started insei (rule by a retired emperor, from his own office): he could act freely because he was not tied by the rules of the throne or the regents. This shifted power from the Fujiwara regents to the retired emperors and the estates they controlled.
Rise of warriors
Estate owners and governors needed protection, so they gathered bands of armed men, the early samurai (bushi), led by head families of the Taira and Minamoto, both descended from imperial lines. The bond was loyalty: protection and rewards in return for service. A revolt in the east led by Taira no Masakado (939) showed that warriors could challenge the court. The court used warriors to put down revolts, and each success made them stronger.
Hogen, Heiji and the Taira
In 1156 (Hogen) a quarrel over who should be emperor and who should lead the Fujiwara was settled by warriors on both sides. In 1159 (Heiji) the Taira and Minamoto fought each other and the Taira won. Taira no Kiyomori became chief minister (dajo-daijin) in 1167, the first warrior to reach this rank, and married a daughter into the imperial house. Many nobles and temples resented the Taira.
The Genpei War and the end of an age
From 1180 the Minamoto, led by Minamoto no Yoritomo, rose against the Taira. This is the Genpei War (1180-1185). In 1185 the Taira were destroyed in the sea battle of Dan-no-ura. Yoritomo then built his own warrior government in the east, which the next lesson explains. Aristocratic rule at Kyoto had ended in practice.
Try it
Draw two bars on paper, "court power" and "warrior power", for the years 900, 1086, 1156 and 1185. Fill each bar by your best guess. Then check against the 3D slider and explain one change in your own words.
Key formulas and definitions
- Shoen = tax-free estates held by nobles and temples
- Insei = rule by a retired emperor, from 1086 (Shirakawa)
- Masakado revolt 939; Hogen 1156; Heiji 1159
- Kiyomori chief minister 1167; Genpei War 1180-1185; Dan-no-ura 1185
- Taira and Minamoto = the two great warrior families
Worked examples
1. In 900 the state collected tax from 90 of every 100 plots. By 1100 only 40 plots paid. Find the fall and what it means.
90 - 40 = 50 plots fewer. The state lost more than half its tax base, so it had less to pay officials and troops and relied more on local warriors.
2. Why did insei weaken the Fujiwara regents?
A retired emperor ruled from his own office with his own supporters and estates. Fujiwara power depended on being the emperor's regent, so their role shrank.
3. Put in order: Dan-no-ura, Hogen, Masakado revolt, Heiji, Kiyomori chief minister.
Masakado revolt (939), Hogen (1156), Heiji (1159), Kiyomori chief minister (1167), Dan-no-ura (1185).
Common mistakes
- Thinking warriors seized power in one day. It took about 250 years.
- Mixing up Taira and Minamoto. Taira won in 1159, Minamoto in 1185.
- Believing insei means the emperor had no power. A retired emperor held real power.
- Forgetting that estates and guards, not a single battle, started the change.