However, it is considered that in the best era of Ise-Heishi when the clan was most prosperous, the north side border was the street that extended east from Gojo-oji Street (the fifth major east-west street) in Heian-kyo Capital (present Matsubara-dori Street), the east side border was Kuruma-oji Street (literally, a big street for vehicles), and the south side border was the street extended east from Rokujo-oji Street (the sixth major east-west street).
しかしながら、伊勢平氏が繁栄を謳歌した最盛期には、北側が平安京の五条大路を東に延長した通り（現在の松原通）、東側が車大路、南側が平安京の六条大路を東に延長した通りであったと考えられている。