Tenpō calendar

was a Japanese lunisolar calendar ("genka reki".. It was published in the Tenpō era (183-1844). It was in use in the late Edo period.
History.
The "Tenpō-reki" system was the work of Shibukawa Kagesuke. This was the last traditional calendar system created by Japanese astronomers and mathematicians.
The "Tenpō" calendar was set aside when Japan adopted the Western calendar in 1872 ("Meiji 5").