Shimane Prefecture has been promoting Software-based IT industry as one of the prefecture's strategic projects. Increasing uncertainty in the market place makes it difficult to capture customers' needs and to develop new businesses and services. In order to defeat the “subcontractor" structure problems confronted by the IT industry in Shimane Prefecture, developing own brand services is highly necessary. Shimane Prefecture started a subsidiary program called “Partner-Style" Business Development Project" in 2012, and then supports allied projects matched by the service providing / user company (Non-IT) company and the IT-related company. This study presents the series of Shimane Prefecture's initiatives to promote the IT industry, and then introduces company cases in which the subsidiary program was utilized.