The Monmu period is a chronological timeframe during the Asuka period of Japanese history. The Mommu period describes a span of years which were considered to have begun in the 1357th year of the imperial dynasty.[1]
This periodization is consistent with the traditional dates asserted for the reign of Emperor Monmu, from 697 through 707.[2]
^Murray, p. 402, p. 402, at Google Books; the system of counting from year-periods (nengō) do not ordinarily overlap with the reigns of the early monarchs; and generally, a new one was chosen whenever it was deemed necessary to commemorate an auspicious or ward off a malign event.