| Sengaku is regarded to have been born in Togoku (the eastern part of Japan, particularly the Kanto region) (one theory is that it was in the Hitachi Province) and from the Hiki clan who were a Gozoku (local ruling family). |
東国生れ（常陸国とする説がある）、豪族比企氏の出身であるとされる。 |