Haruo TSUCHIMIKADO of the Bureau of Divination was against introducing the solar calendar and suggested a plan to change the calendar of the lunar solar calendar during the period of the Meiji Restoration, however after he died suddenly, this plan was cancelled and the Tenpo-reki became the last lunar solar calendar in Japan.
なお明治維新の際、陰陽寮・土御門晴雄が太陽暦導入に反対して、太陰太陽暦に基づく改暦を企図したが、明治2年に晴雄の急逝により計画が中止されたために、天保暦が日本における最後の太陰太陽暦となった。