Era
20th century
32
Restoration, 1853-1870
24
1900-1999
23
1868-1912
20
19th century
19
1800-1899
16
1939-1945
16
1600-1868
14
1853-1870
14
1912-1945
11
Meiji period, 1868-1912
10
1900 - 1999
9
1945-
9
21st century
9
Allied occupation, 1945-1952
9
1836-1867
6
1868 - 1912
6
1868-
6
1939 - 1945
6
1945-1952
6
2000-2099
6
1333-1600
5
1415-1499
5
1600 - 1868
5
1863-1957
5
1866-1925
5
1903-
5
1937-1945
5
Period of civil wars, 1480-1603
5
Since 1868
5
1521 or 1522-1591
4
17th century
4
1830-1859
4
1833-1877
4
1835-1901
4
1841-1909
4
1867-1941
4
1870-1922
4
1880-1964
4
1886-1968
4
1929-
4
Azuchi-Momoyama period, 1568-1603
4
Edo period, 1600-1868
4
Since 1945
4
To 1868
4
-1624
3
1222-1282
3
1579-1647
3
1758-1831
3
1782-1863
3
more ...