1100s in Japan

Japanese era from August 1099 to February 1104

was a after Kōwa and before Kajō. This period spanned the years from February 1104 through April 1106. The reigning emperor was .

, also romanized as Kashō, was a after Chōji and before Tennin. This period spanned the years from April 1106 through August 1108. The reigning emperors were and .

Japanese era from August 1108 to July 1110