Era
20th century
6
Japanese occupation, 1910-1945
2
-1560
1
-approximately 1540
1
1564-1616
1
1637-1864
1
1721-1793
1
1735-1815
1
1772-1832
1
1860-1911
1
1868-1918
1
1869-1948
1
1872-1918
1
1874-1965
1
1894-1917
1
1895-1952
1
18th century
1
1900-2002
1
1904-1976
1
1912-1994
1
1919-1947
1
1921-2021
1
1924-1966
1
1924-1984
1
1926-2022
1
1928-1965
1
1930-2002
1
1931-1965
1
1945-
1
1977-
1
21st century
1
Civil War, 1936-1939
1
Elizabeth II, 1952-2022
1
Nicholas II, 1894-1917
1
active 1539-1560
1