Era
1945-1989
Since 1945
1945-
1,235
1989-
804
20th century
83
1945 - 1989
72
1945-1953
72
1951-
54
1945-1955
38
1945-1990
33
1990-
28
Revolution, 1956
24
Heisei period, 1989-
22
1989-1993
21
Allied occupation, 1945-1952
21
1900-1999
20
1949-
20
21st century
16
1913-1994
15
1980-
15
1945-1991
14
1946-
14
1955-1965
14
1971-1990
14
1975-1985
14
1952-
13
1981-1989
13
1960-
12
1985-1995
12
1932-2009
11
1965-1975
11
1968-1989
10
1969-
10
20th Century
10
1980-2020
9
1924-
8
1945-1980
8
1948-1980
8
1950-
8
1985-1991
8
Since 1900
8
1917-1963
7
1945-1989-
7
1948-
7
1953-1961
7
1958-
7
1970-
7
20e siècle
7
1884-1972
6
1901-1989
6
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