The Heavy Ion Medical Center is a division of Gunma University Hospital dedicated to cancer treatment using heavy ion beams. The irradiation facility is located in a corner of the Showa Campus. Gunma University's heavy ion therapy device began treatment in March 2010, making it the third facility in Japan (currently, seven facilities nationwide). Being the first facility attached to a university hospital, it specializes in comprehensive care for patients with coexisting diseases or those requiring multidisciplinary treatment involving various medical departments. It has accumulated a wealth of treatment records, knowledge, and expertise.

    The treatment process involves consultation, examinations, treatment planning, and subsequent heavy ion beam irradiation. Follow-up observations are also conducted based on the patient's condition. One notable feature of nursing care is that the same nursing staff in the department is responsible for their respective patients from their initial visit until the completion of treatment. Nurses guide patients and serve as their support and consultation partners until they return to the waiting area after each examination or treatment session.

    The interior of the CT simulation room is characterized by gentle-colored plaster walls and paintings of keyaki (zelkova) trees created with a trowel. Professor Mari Tanaka from the Faculty of Education designed the interior, saying, "Please experience the peaceful atmosphere created by the plaster. The paintings of keyaki trees, window frames made with Akagi Mountain soil, and silk fabrics incorporate traditional craftsmanship from Gunma. This space, which has won the Japan Plaster Association's award, is filled with the thoughts of healthcare professionals, and we hope that patients can undergo examinations here with a sense of security."