Kokugaku (Kyūjitai: 國學, Shinjitai: 国学; literally "national study") was an academic movement, a school of Japanese philology and philosophy originating during the Edo period.
Kokugaku scholars criticized the repressive moralizing of Confucian thinkers, and tried to re-establish Japanese culture before the influx of foreign modes of thought and behaviour.
The kokugaku school held that the Japanese national character was naturally pure, and would reveal its inherent splendor once the foreign (Chinese) influences were removed.
[5] According to scholar of religion Jason Ānanda Josephson, kokugaku played a role in the consolidation of State Shinto in the Meiji era.
It promoted a unified, scientifically grounded and politically powerful vision of Shinto against Buddhism, Christianity, and Japanese folk religions, many of which were named "superstitions.