Japan: Polity Style: 1392-2024 |
before 1392 - 29 Nov 1890 |
Nippon Koku [1] |
29 Nov 1890 |
effective date of the Constitution promulgated 11 Feb 1889 |
29 Nov 1890 - 3 May 1947 |
Dai Nippon Teikoku |
3 May 1947 |
effective date of the amendments to the Constitution promulgated 3 Nov 1946 |
3 May 1947 - |
Nippon Koku |