Takeshimism (竹島主義 Takeshima-shugi) was a right-wing, nationalist, corporatist and militarist ideology originating in Chisei during the late 19th century. The father of Takeshimism, Sakata Ashitaka, claimed it to be a resurrection of the ideals of Takeshima Noriko, a 16th-century noble and military leader who led the resistance against the Yamataian invasion of Chisei from 1580 to 1591, and reestablished the independence of Shirakawa under the Takeshima Regency and the Shun dynasty.
Sakata's ideas, first formulated in the 1870s as the Yamataian Empire was rapidly expanding and increasingly coming into conflict with Chisei, would explode in popularity after the crushing Yamataian victory over Chisei in the First Escar-Varunan War, which saw the loss of Chisei's Varunan Ocean territories and the occupation of the Chiseian west coast by Yamatai. Elements of Takeshimism would subsequently be adopted by the revanchist military regime of the Conciliar Government, established in 1924.
- Pan-Chiseian and anti-Yashiman; Sakata believed Chiseian Yashimans were in fact the descendants of the 'Ezo nation' - they were closer to the Kannaguru than the Yashiman, and society must in fact be 'cleansed' of such influences. He did not consider Uraani or Ashiwase to be Chiseian however, and saw Kitahashinese as a Yashiman diaspora within Chisei.
- The nation is degenerated. The nation will soon be destroyed and this is inevitable - it is necessary to prepare to rebuild it for the greater struggle to come.
- Need for a new form of meritocratic and technocratic government that unites all arms of society in a revolution against degeneration and foreign enemies after the collapse.
- Embrace of 'rational rituals' of family and the state over 'superstitions'. Spirituality should be guided and used as a method to cultivate the energy of the nation for the coming struggle.