Jōkyō calendar
Calendario Jōkyō
- Date
- 1684 · confidence high
- Place
- Kyoto, Japan
- Credited to
- Shibukawa Harumi
- People
- 👤 Shibukawa Shunkai1639–1715
- Field
- Cosmos & Earth
What was discovered
The first calendar produced in Japan from its own observations, correcting a two-day error accumulated by the Chinese Xuanming calendar used for 800 years. It included the difference in longitude between China and Japan.
What it led to
- official astronomy of the shogunate
- the Hōreki and Kansei calendars
- Japanese celestial globes and star maps