Wikipedia
Kōbun (period)
The Kōbun period is a chronological timeframe during the Asuka period of Japanese history. The Kōbun period describes a span of years which were considered to have begun in the 1332nd year of the Yamato dynasty.
This periodization is consistent with the short reign of Emperor Kōbun, which is traditionally considered to have been from 672 through 673.