The Tajihi clan's ancestor Prince Tajihiko was a great-grandson of the sixth-century
Emperor Senka through his son
Prince Kamueha. Their imperial ancestry categorizes them as one of the
kōbetsu (皇別) clans, descended from the
Japanese imperial family. The clan's original
kabane was
Kimi (公), but were given the title
Mahito (or
Mabito) by
Emperor Tenmu in 684. , who served at the courts of Emperor Tenmu,
Empress Jitō and
Emperor Monmu, rose to the prestigious rank of
Minister of the Left. His sons Ikemori (多治比池守), Agatamori (多治比県守), Hironari (多治比広成), Hirotari (多治比広足) held various key positions at court, including
dainagon and
chūnagon.
Tajihi no Mamune (多治比真宗, 769–823), a great-granddaughter of Ikemori, served as a consort of
Emperor Kanmu. Until the middle of the
Nara period the Tajihi were one of the clans at the pinnacle of court society, but after this time became increasingly overshadowed by the
Fujiwara clan. Around the start of the
Heian period the Tajihi clan mostly disappeared from the court society. The , a group of warriors in
Musashi Province and one of the so-called , were remote descendants of the Tajihi clan who took up martial ways. == References ==