Fetching details from the dictionary...
national polity
National Athletic Meet
天皇制は戦前における日本の国体の根幹をなすとされた。
The imperial system was regarded as the foundation of Japan's prewar national polity.
国体の変革を求める運動が当時広がっていた。
A movement calling for a change in the national polity was spreading at the time.
戦後、国体をめぐる解釈が新憲法の下で刷新された。
After the war, interpretations of the national polity were renewed under the new constitution.