Time Periods
Kotō
Heian Period
794 - 1192
The late Heian period saw the birth of the Kotō blades.
Kotō
Kamakura Period
1192 - 1333
Kotō
Numbokuchō Period
1331 - 1392
Kotō
Muromachi Period
1392 - 1573
Kotō & Shintō
Azuchi-Momoyama Period
1573 - 1603
From 1596 to 1644, the Keichō Shintō were produced.
Shintō
Edo Period
1603 - 1764
From 1664 to 1781 is the time period when the Kanbun Shintō swords were produced.
Shinshintō
Edo Period
1764-1868
From 1781 to 1868, this is the time period of the Shinshintō swords.
Shinshintō & Gendaitō
Meiji Period
1868 - 1912
In 1876 the Meiji government's decree of 'Haitorei' was issued, effectively outlawing the right to carry swords in public.
Gendaitō
Taishō Period
11912 - 1926
Gendaitō
Shōwa Period
1926 - 1989
Gendaitō
Heisei Period
1989 - 2019
Gendaitō
Reiwa Period
2019 - Present
From 1867 till the present, the swords are considered Gendaitō, contemporary blades.