How did political power in Japan shift between 794 and 1192 A. D?

Explanation:

The Heian period (平安時代, Heian jidai) is the last division of classical Japanese history, running from 794 to 1185.[1] The period is named after the capital city of Heian-kyō, or modern Kyoto. It is the period in Japanese history when Buddhism, Daoism and other Chinese influences were at their height. The Heian period is also considered the peak of the Japanese imperial court and noted for its art, especially poetry and literature. Although the Imperial House of Japan had power on the surface, the real power was in the hands of the Fujiwara clan, a powerful aristocratic family who had intermarried with the imperial family. Many emperors actually had mothers from the Fujiwara family.[2] Heian (平安) means "peace" in Japanese

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