Keiun (慶雲), also known as Kyōun, was a Japanese era name (年号, nengō, "year name") following Taihō and preceding Wadō. The period spanned the years from May 704 through January 708.[1] The reigning emperors were Monmu-tennō (文武天皇) and Genmei-tennō (元明天皇).[2]