Additionally, Tsunekiyo married a daughter of ABE no Yoritoki, a member of the local ruling family who controlled Okuroku-gun (six counties in the middle of Mutsu Province) in Mutsu Province, to form a relative alliance with them and took charge of the south side defense of the Abe clan's family territory.
また経清は陸奥奥六郡を牛耳る豪族・安倍頼時の娘を娶って縁戚関係を結び、安倍氏一門の南方の固めとなっていた。