Era
20th century
15
Edo period, 1600-1868
10
1912-1945
9
Bombardment, 1945
4
1644-1694
3
1868-1912
3
1945-
3
19th century
3
Heian period, 794-1185
3
1200-1253
2
1363-1443
2
1760-1849
2
1797-1858
2
1868-
2
1900-2002
2
1901-1989
2
1921-2021
2
1926-2022
2
1930-2002
2
1933-
2
1933-1945
2
21st century
2
Elizabeth II, 1952-2022
2
To 1600
2
1185-1600
1
1192-1219
1
1253-1333
1
1571-1622
1
1600-1868
1
1663-1743
1
1758-1831
1
1772-1837
1
1798-1861
1
17th century
1
1837-1913
1
1849-1940
1
1853-1890
1
1864-1909
1
1866-1925
1
1866-1942
1
1867-1916
1
1868 1912
1
1870-1922
1
1874-1965
1
1885-1923
1
1886-1950
1
1886-1965
1
1889-1977
1
1890-1945
1
1894-1982
1
more ...