A native of Miyazaki Prefecture, Japan, Kazuki graduated from Miyazaki Gakuen High School and obtained a physical therapist license from the Department of Rehabilitation at Kyushu University of Nursing and Social Welfare. He has engaged in rehabilitation for a wide range of patients at a general hospital, a care facility for the elderly, and a home-visit rehabilitation service. He currently works part-time at an orthopedic clinic while providing support focused on PRI and Pilates at Daisy. He resides in Miyazaki Prefecture.