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reference
Japan and Korea

Japan

Jomon: 10,000 BC-300 BC
Yayoi: 300 BC-300 AD
Kofun (Tumulus): 300-650
Asuka(Suiko): 550-710
Nara: 645-794
Early Nara (Hakuho): 645-710
Late Nara (Tempyo): 710-794
Heian: 794-1185
Early Heian (Jogan): 794-897
Late Heian (Fujiwara): 897-1185
Kamakura: 1185-1333
Nambokucho: 1336-1392
Muromachi (Ashikaga): 1336-1573
Momoyama: 1573-1615
Edo (Tokugawa): 1615-1868
Early Edo: 1615-1716
Kambunera: 1661-1673
Genroku era: 1688-1704
Late Edo: 1716-1868
Meiji: 1868-1912
Taisho: 1912-1926
Showa: 1926-1945
Heisei: 1989

Korea

Three Kingdoms: 57 BC-668 AD
Paekche: 18 BC-663 AD
Koguryo: 37 BC-668 AD
Old Silla: 57 BC-668 AD
Silla Dynasty: 668-935
Koryo Dynasty: 918-1392
Yi Dynasty: 1392-1910
Choson Dynasty: 1910-1945