The other two major barriers were Fuwa no seki (Fuwa Barrier), Suzuka no seki (Suzuka Barrier) and Arachi no seki (Arachi Barrier) instead of Osaka no seki being one of the three major barriers until the early Heian period.
なお、残り二関は不破関と鈴鹿関であり、平安前期までは逢坂関ではなく愛発関が三関の一つであった。