Japanese historical periods and how they relate to sword eras

In Japanese sword terms, you’ll hear works referred to as koto (old swords), shinto (new swords), shinshinto (new, new swords) and gendaito (modern swords).

Rather than being relative terms, these have become fixed terms to describe specific periods of sword making.

Historical PeriodTimeline (CE)CapitalNotes
Nara710-794Nara
Heian794-1185Heian (Kyoto)
Kamakura1185-1333Kamakura
Nambokucho1336-1392Heian (Northern Court)
Yoshino (Southern Court, near Nara)
Muromachi1336/1392-1573
Momoyama1568/1573-1600Azuchi (Shogun) until 1582
Heian (Emperor) from 1582
1582 was the death of Oda Nobunaga.
Also known as the Azuchi-Momoyama period
Edo1600-1868Edo (Tokyo)Tokugawa Ieyasu declared Shogun in 1603.
Meiji1868-1912TokyoEdo renamed after the imperial family relocated i 1869.
Taisho1912-1926Tokyo
Showa1926-1989Tokyo