Kyūan
Kyūan (久安?), also romanized as Kyū-an, was a Japanese era name (年号,, nengō,?, lit. "year name") after Ten'yō and before Ninpei. This period spanned the years from July 1145 through January 1151. The reigning emperor was Konoe-tennō (近衛天皇?).
...
Wikipedia