Era
20th century
55
1989-
41
1945-
28
Allied occupation, 1945-1952
17
1945-1989
14
19th century
14
1912-1945
13
1926-1945
12
1868-
9
1900-1999
9
21st century
9
Meiji period, 1868-1912
9
Tokugawa period, 1600-1868
9
18th century
8
1912-1949
7
1868-1912
6
Bombardment, 1945
6
To 1868
6
1600-1868
4
1880-1964
4
Edo period, 1600-1868
4
Restoration, 1853-1870
4
17th century
3
1872-1951
3
1887-1975
3
1918-1945
3
1937-1945
3
Since 1945
3
To 1600
3
1185-1868
2
1368-1644
2
1605-1689
2
1637-1864
2
1644-1694
2
1760-1849
2
1867-1947
2
1868 - 1912
2
1882-1945
2
1886-1971
2
1889
2
1891-1969
2
1893-1976
2
1901-1936
2
1906-1967
2
1928-1937
2
1941-
2
1942-
2
2000-2099
2
20e siècle
2
Cenozoic
2
more ...