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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.

This periodization is consistent with the traditional dates asserted for the reign of Emperor Monmu, from 697 through 707.

Periodization

The adoption of the Sexagenary cycle calendar (Jikkan Jūnishi) in Japan is attributed to Empress Suiko in 604; and this Chinese calendar continued in use throughout the Mommu period.

In 645, the system of Japanese era names (年号, nengō, "year name") was introduced. However, after the reign of Emperor Kōtoku, this method of segmenting time was temporarily abandoned or allowed to lapse. This interval continued during the Monmu period.

Neither Empress Mommu's reign nor the Monmu periodization are included in the list of nengō for this explicit duration of time, which comes after Suchō and before Taihō.

In the post-Taika or pre-Taihō chronology, the first year of Emperor Monmu's reign (文武天皇元年 or 文武統皇1年) is also construed as the first year of the Mommu period (文武1年).

Non-nengō period

Non-nengō periods in the pre-Taihō calendar were published in 1880 by William Bramsen. These were refined in 1952 by Paul Tsuchihashi in Japanese Chronological Tables from 601 to 1872.

The pre-Tahiō calendar included two non-nengō gaps or intervals in the chronological series:

• Taika, August 645–February 650.
• Hakuchi, February 650–December 654.
  • Non-nengō dating systems
• Shuchō, July–September 686.
  • Non-nengō dating systems
• Taihō, March 701–May 704.

Nengō were not promulgated (or were allowed to lapse) during the gap years between Hakuchi and Shuchō, and in another gap between Shuchō and Taihō.

Events of the Mommu period

• 697 (Mommu 1): Empress Jitō abdicates; and her son receives the succession (senso). Shortly thereafter, Emperor Mommu formally accedes to the throne (sokui).
• 697 (Mommu 1): A new period could be said to have commenced at the beginning of the reign of any of the Japanese sovereigns after Kōtoku and including Mommu

See also

• Regnal name
• List of Japanese era names

Notes

1. ^ Murray, David. (1894). The Story of Japan, p. 402, p. 402, at Google Books, citing William Bramsen. (1880). Japanese Chronological Tables, pp. 54–55, p. 54, at Google Books; compare, the Japanese National Diet Library website explains that "Japan organized its first calendar in the 12th year of Suiko (604)", which was a pre-nengō time frame.
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.
3. Nussbaum, Louis-Frédéric. (2005). "Jikkan Jūnishi" in Japan Encyclopedia, p. 420, p. 420, at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at archive.today
4. Titsingh, Isaac. (1834). Annales des empereurs du Japon, p. 30., p. 30, at Google Books
5. ^ Tsuchihashi, Paul. (1952). Japanese Chronological Tables from 601 to 1872, p. 16.
6. ^ Nussbaum, "Taika" at p. 924., p. 924, at Google Books
7. ^ Nussbaum, "Hakuchi" at p. 280, p. 280, at Google Books.
8. ^ Nussbaum, "Shuchō" at p. 889, p. 889, at Google Books.
9. Shinengō used prior to the reestablishment of the nengō system in 701 are usually called itsunengō (逸年号). A list of shinengō and more information can be seen in the Japanese Misplaced Pages page ja:私年号.
10. NengoCalc (645) 大化 Taika, online conversion of Japanese dates into their Western equivalents; calculation is based on tables from Tsuchihashi and Zöllner.
11. NengoCalc (650) 白雉 Hakuchi
12. NengoCalc (655) 斉明 Saimei
13. NengoCalc (622) 天智 Tenji
14. Brown, Delmer M. et al. (1979). Gukanshō, p. 268 n39., p. 268, at Google Books; post-Meiji historians identify the reign of Emperor Kōbun between the reigns of Emperor Tenji and Emperor Temmu, but pre-Meiji historians did not construe Prince Ōtomo in the traditional order of succession; compare Ponsonby-Fane, Richard. (1959). The Imperial House of Japan, p. 52; and see Imperial Household Agency (Kunaichō): 天智天皇 (38)
15. Murray, p. 402, p. 402, at Google Books; Sujaku is also known as an Itsunengō (逸年号)
16. NengoCalc (672) 弘文 Kōbun
17. Murray, p. 402, p. 402, at Google Books; Hakuhō, also known as Itsunengō; compare Nussbaum, "Hakuhō" at p. 280, p. 280, at Google Books; Hakuhou jidai, JAANUS (Japanese Architecture and Art Net Users System), 2001; retrieved 16 September 2009.
18. NengoCalc (673) 弘文 Temmu
19. NengoCalc (686) 朱鳥 Suchō
20. NengoCalc (687) 持統 Jitō
21. ^ Brown, p. 270, p. 270, at Google Books; excerpt, "The eras that fell in this reign were: (1) the remaining seven years of Shuchō ; and (2) Taika, which was four years long . (The first year of this era was kinoto-hitsuji .) ...In the third year of the Taka era , Empress Jitō yielded the throne to the Crown Prince."
22. NengoCalc (697) 文武 Mommu
23. NengoCalc (701) 大宝 Taihō
24. Varley, H. Paul. (1980). Jinnō Shōtōki, p. 44.

References

• Bramsen, William. (1880). Japanese Chronological Tables: Showing the Date, According to the Julian or Gregorian Calendar, of the First Day of Each Japanese Month, from Tai-kwa 1st year to Mei-ji 6th year (645 AD to 1873 AD): with an Introductory Essay on Japanese Chronology and Calendars. Tokyo: Seishi Bunsha. OCLC 35728014
• Brown, Delmer M. and Ichirō Ishida, eds. (1979). Gukanshō: The Future and the Past. Berkeley: University of California Press. ISBN 978-0-520-03460-0; OCLC 251325323
• Murray, David. (1894). The Story of Japan. New York, G. P. Putnam's Sons. OCLC 1016340
• Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 58053128
• Ponsonby-Fane, Richard Arthur Brabazon. (1959). The Imperial House of Japan. Kyoto: Ponsonby Memorial Society. OCLC 194887
• Titsingh, Isaac. (1834). Nihon Ōdai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691
• Tsuchihashi, Paul Yashita, S.J. (1952). Japanese chronological tables from 601 to 1872 (邦曆西曆對照表: 自推古九年至明治五年, Hōreki seireki taishōhyō: Suiko kyūnen yori Meiji gonen ni itaru). Tokyo: Sophia University. OCLC 001291275
• Varley, H. Paul. (1980). A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa. New York: Columbia University Press. ISBN 978-0-231-04940-5; OCLC 6042764
• Zöllner, Reinhard. (2003). Japanische Zeitrechnung: ein Handbuch Munich: Iudicium Verlag. ISBN 978-3-89129-783-4; OCLC 249297777

External links

• Media related to Monmu period at Wikimedia Commons
• National Diet Library, "The Japanese Calendar" – historical overview plus illustrative images from library's collection

• Japanese eras