Tenpō calendar facts for kids
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).
- National Diet Library, "The Japanese Calendar"
Tenpō calendar Facts for Kids. Kiddle Encyclopedia.