Seiji and Junior are actual brothers.
They are employed by Yoshimoto Kogyo, and are mainly active in Tokyo and Osaka.
The duo formed in June 1989 when Seiji invited Junior, who dropped out of high school at the time to form a unit and become comedians at the Yoshimoto NSC in Osaka.
[1] The duo started official activities in 1990.
[2] This list consists of only media appearances made by the duo Chihara Kyōdai when they appear together.