The was a Japanese aristocratic kin group. The Ichijà  was a branch of the Fujiwara clan, founded by Kujà  Michiie's son Ichijà  Sanetsune and was one of the Five regent houses, from which the Sesshà  and Kampaku were chosen.
The , a cadet branch of the Ichijà  family, was established during the chaos of à Ânin War. In 1475, Ichijà  Norifusa, the 9th head of the family, fled from Kyoto to Tosa Province, where one of the fiefdoms the family held by the time; some descendants of Norifusa stayed in Tosa for generations. The family, however, eventually lost control of Tosa during the reign of Ichijà  Kanesada since 1575.
The following is the list of the heads of the Tosa-Ichijà  clan:
In 1902, Ichijà  Sanemoto (ä¸Âæ¡å®Âåº, 1901-1972), eldest son of Ichijà  Saneteru (25th head of Ichijà Â) and his second wife, became a baron, in name of revival for the Tosa-Ichijà  clan. Baron Ichijà  Sanemoto later married a British woman, Tess Snare (1900-1982), in 1928.
The was founded in 1679 by Ichijà  Akiyoshi's second son Fuyumoto. The family name was given by Fuyumoto's cousin, Emperor Reigen.