Therapies developed on the Illuminox platform involve administering a targeting moiety conjugated with one or more dyes, which is illuminated by light at a specific wavelength. Light illumination of the targeted cells transiently excites the drug, and pre-clinical data have shown this excitation elicits rapid and selective necrosis of targeted cells through a biophysical process.

Based on this agreement, both companies will use their expertise to work toward the joint development of technology that will allow visualization, measurement, and recording of the reaction of the dye to light illumination in real-time. This will allow for optimization of light irradiation depending on the tumor. Both companies will cooperate to aim for commercialization of the medical device using the technology on a worldwide basis.

Rakuten Medical is developing therapies on its Illuminox platform, an investigational treatment platform based on a cancer therapy called photoimmunotherapy developed by Dr. Kobayashi and team from the National Cancer Institute in the United States. In September 2020, Rakuten Medical announced that its wholly owned subsidiary Rakuten Medical Japan K.K. received conditional marketing approval in Japan from the Ministry of Health, Labour and Welfare for ASP-1929 Photoimmunotherapy and a laser light device to treat unresectable locally advanced or recurrent head and neck cancer, and began commercialization in January 2021. Shimadzu is focusing on creating innovative products and services, which combine analytical measurements with diagnostic imaging in the healthcare field. Utilizing its measurement technologies, Shimadzu has worked with cancer institutes in both USA and Japan for the development of photoimmunotherapy at the pre-clinical stage.