Keichō (慶長) was a Japanese era name (年号, nengō, "year name") after Bunroku and before Genna.
This period spanned from October 1596 to July 1615.
[1][2] The reigning emperors were Go-Yōzei-tennō (後陽成天皇) and Go-Mizunoo-tennō (後水尾天皇).
[3]