During the Pacific War, the Kogi Shingon (Old Shingon) sect and the Shingi Shingon (New Shingon) sect were combined and united with the Dai-Shingon sect (literally, the Great Shingon sect) due to the government's policy on religion.
太平洋戦争中に、政府の宗教政策により、古義真言宗と新義真言宗の合同が計られ、大真言宗に統合された。