As for outside Owari Province, after Kiyoyasu MATSUDAIRA was killed in a freak accident of the Moriyamakuzure Affair (also known as 'the assassination of Kiyoyasu Matsudaira') in 1535, Nobuhide invaded Mikawa in an unguarded moment of confused Matsudaira clan, and captured Ansho-jo Castle and kept it under control in 1540.
対外においては天文4年（1535年）に松平清康が守山崩れで不慮の死を遂げると、混乱する松平氏の隙を突いて三河に侵攻し、天文9年（1540年）には安祥城を安城合戦第一次安城合戦し、支配下に置いた。