After they developed their techniques through construction, first, Kofun (tumulus) in the sixth to seventh centuries, and then stonewalls of Enryaku-ji Temple and stonewalls and stone pagodas of small village temples, they got involved in the construction of the stonewalls of Osaka-jo Castle, Jurakudai residence and Fushimi-jo Castle, and it is supposed that Tsunaie got help and assistance from such professional groups.
6・7世紀の古墳に始まり、延暦寺の石垣や里坊等の石垣・石塔などで技術を磨き、大坂城・聚楽第・伏見城等の石垣構築に当たったが、綱家もこうした職人集団に支えられていたのである。