The Ichijo family were relatives of MINAMOTO no Yoritomo: Yoshiyasu ICHIJO, who died two years before, was the husband of Yoritomo's younger sister and Takayoshi, Yoshiyasu's son who died suddenly the following year (or five months before the arrest) was a nephew of Yoritomo.
一条家は源頼朝の縁戚で、2年前に死去した一条能保は頼朝の妹婿、その翌年（すなわち拘束の5ヶ月前）に急逝した息子・高能は頼朝の甥にあたった。