In the written opinion, he stressed the importance of acquisition of existing private railways in addition to his theory of nationalization of railways and insisted, for the purpose, that it was necessary to enact the law to acquire private railways.
この上申書では、従来からの鉄道国有論に加えて既設私設鉄道の買収を前面に押し出しており、そのためには私設鉄道買収法の制定が必要であると説いている。