Chōhō (長保) was a Japanese era name (年号,,nengō,, lit. "year name") after Chōtoku and before Kankō. This period spanned the years from January 999 through July 1004. The reigning emperor was Ichijō-tennō (一条天皇).
999Chōhō gannen (長保元年): The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in Chōtoku 5, on the 13th day of the 1st month of 999.
Events of the Chōhō era
999 (Chōhō 1, 11th month: A daughter of Fujiwara no Michinaga is accepted into the Imperial household as Emperor Ichijō's second empress consort. Aikio, better known as Fujiwara no Shōshi (988-1074), is given the title of Chūgū.
1001 (Chōhō 3, 11th month): The Imperial palace was destroyed by fire.
1001 (Chōhō 3, 12th month): The widow of Emperor En'yū and the mother of Emperor Ichijō died. She was formerly known as Fujiwara no Senshi.