Masashige was put in the Osaka-jo Castle as kanja (spy) by Katsushige ITAKURA, the provincial military governor of Kyoto (later Shoshidai [the representative of Samurai-dokoro in Kyoto]).
京都の守護（のちに所司代）板倉勝重は朝比奈を、間者として大坂城に入れておいた。