Genkō (元亨) was a Japanese era name (年号, nengō, "year name") after Gen'ō and before Shōchū.

[1] This period spanned the years from February 1321[2] to December 1324.

[3] The reigning Emperor was Go-Daigo-tennō (後醍醐天皇).

[4] The oldest extant account of Buddhism in Japan, the Genkō Shakusho (元亨釈書), was completed in Genkō 2, whence the era name in its title.

The massive project was the work of Kokan Shiren.