Editing Module:Tenpō (section)

==Other events of the ''Tenpō'' era==
* '''1834''' (''Tenpō 5''): [[Kondō Isami]] born in Tama.
* '''July 20, 1835''' (''Tenpō 6, 7th day of the 6th month''):<!-- NengoCalc 天保七年六月七日 --> Earthquake in Sanriku (Latitude: 37.900/Longitude:  141.900), 7.6 magnitude on the [[Richter Scale]].<ref name="NOAA">[http://www.ngdc.noaa.gov "Significant Earthquake Database"], U.S. National Oceanic and Atmospheric Administration (NOAA), National Geophysical Data Center (NGDC)</ref>
**[[Hijikata Toshizō]] born, May 5.
* '''1836''' (''Tenpō 7''): [[Matsudaira Katamori]] born in [[Edo]].
* '''1837''' (''Tenpō 7''): [[Tokugawa Ieyoshi]] becomes the 12th ''[[shōgun]]'' of the [[Tokugawa shogunate|bakufu]] government.<ref name="hall21">Hall, John Whitney ''et al.'' (1991). [https://books.google.com/books?id=k_BrQL4Pn0QC&dq=tokugawa+ienari&pg=PA21  ''Early Modern Japan'', p. 21.]</ref>
*  '''1837''' (''Tenpō 8''): [[Tokugawa Yoshinobu]] born.
* '''April 25, 1843''' (''Tenpō 14, 25th day of the 3rd month''):<!-- NengoCalc 天保十四年三月二十六日 --> Earthquake in Yezo, Kushiro, Nemuro (Latitude: 41.800/Longitude: 144.800), 8.4 magnitude on the Richter Scale.<ref name="NOAA"/>
* '''1844''' (''Tenpō 15''): Insurrection in [[Chōshū Province|Chōshū]]; also, [[Saitō Hajime]] born in Edo.

===Calendar revision===
During the Tenpō era, [[Koide Shuke]] translated portions of [[Jérôme Lalande]]'s work on astronomy. Koide presented this work to the Astronomy Board as evidence of the superiority of the European calendar, but the effort produced no identifiable effect.<ref>Smith, David. (1914). {{Google books|J1YNAAAAYAAJ|''A History of Japanese Mathematics'', pp. 267. |page=267}}</ref> However, Koide's work and translations of other Western writers did indirectly affect the ''Tenpō'' calendar revision in 1842–1844. A great many errors had been found in the lunar calendar; and a revised system was publicly adopted in 1844. The new calendar was called the ''Tenpō-Jinin'' calendar. It was in use in Japan until 1872 when the Gregorian calendar was adopted.<ref>Hayashi, Tsuruichi. (1907). "A Brief history of the Japanese Mathematics",  {{Google books|k7LxAAAAMAAJ|''Nieuw archief voor wiskunde'' ("New Archive of Mathematics"), p. 126.|page=126}}</ref>