The Gihō calendar (儀鳳暦, Gihō-reki), also known as Yi-feng li, was a Japanese lunisolar calendar (genka reki).
[1] The calendar was created in China.
It was first used in the Rintoku era during the Tang dynasty.
[2] The Gihō-reki system was brought from Korea to Japan between 676 and 678, during the Asuka period of Japanese history.
[3] For a short time, both Genka and Gihō calendars were in use.