In Japan, pharmacists who are in consultation with doctors independently prepare medications in an attempt to meet the needs of patients in the hospital. In particular, the need for hospital preparations to treat cancer is high and diverse. However, unlike gov]ernment-approved medications, independently and individually prepared hospital preparations raise concerns about their effectiveness, safety, economic efficiency, quality control, etc. One way to address these concerns is to commercialize these preparations and to understand the difference between necessity and demand from various points of view. We have conducted nation-wide utilization surveys and evaluated the literature on hospital preparations. On the basis of the findings of this survey, we have concluded that pharmaceutical companies and the government need to implement the commercialization of hospital preparations in clinical practice. In this report, we discuss the significance of commercialization of hospital preparations, concerns regarding pharmaceutical preparations, and our recent efforts on cancer treatment. We hope to continuously contribute to society and to medical care by improving individualized care and by commercializing medications needed in clinical practice.