The main purpose of this article is to deeply understand the preservation of Tennosei(Imperial system) through the examples of the Tennos who became Onryo(revengeful ghost)s, and reveal the unique ideological features of the system. The list of Tennos who became Onryos includes the 47th Tenno Junnin, 75th Sutoku, 81st Antoku, 82nd Gotoba, 84th Juntoku, 96th Godaigo, and etc. These OnryoTennos were formed and flourished mainly around the Heian and Kamakura period, and various Chinkon(Repose of souls) methods emerged to resolve social unrest. Chinkon had a close connection with Buddhism, and through Chinkon they were expressed not as historical losers but as anew positive energy that reshaped the society and elevated the Tenno’s internal authority. In this process, the article could clearly reveal that the diverse process of Chinkon functioned as a driving force for the preservation of Tennosei, and also could identify that Onryo viewpoint of Japanese people was transcended into Wakon(Nigimitama), which contributed to the creation of unique Japanese Onryo culture.