After the end of WWII, Prince Takamatsu became the honorary president of various charitable, cultural and athletic organizations including the Japan Fine Arts Society, the Denmark-Japan Society, the France-Japan Society, the Tofu Society for the Welfare of Leprosy Patients, the Sericulture Association, the Japan Basketball Association, and the Saise Welfare Society. He also served as a patron of the Japanese Red Cross Society (present day the Honorary President is Empress Michiko) and was a major contributor of the NBTHK (Nihon Bijutsu Token Hozon Kyokai or Society for the Preservation of the Japanese Sword). He also officiated the Honorary President of the Preparatory Committee for founding International Christian University (ICU) located in Mitaka, Tokyo.