He received his M.D. and Ph.D. degrees and worked as a Resident at Department of Dermatology, Hokkaido University School of Medicine. He became an Assistant at Department of Dermatology, Fukui Medical University and then he became an Assistant Professor at the same department. His main areas of expertise are the dermatopathology, dermoscopy, and cutaneous lymphoma. Kiyohara is a member in the Japanese Dermatological Association, Japanese Skin Cancer Society, Japanese Society of Dermatopathology, and Japanese Association of Dermatologic Surgery.