Oral Rehabilitation, Niigata University Medical and Dental Hospital

Division of Geriatric Dentistry, School of Dentistry, Health Sciences University of Hokkaido

Department of Dental Hygiene, Tokyo Dental Junior College

Dentistry for the Disabled, Kyushu Dental University

Japan Community Healthcare Organization Tokyo Shinjuku Medical Center, Dentistry & Oral Surgery

Division of Dental Anesthesiology, Kyushu Dental University

Department of Removable Prosthodontics and Gerodontology, Tokyo Dental College

Yokosuna Dental Clinic（Shizuoka）

Division of Geriatric Dentistry, School of Dentistry, Health Sciences University of Hokkaido

Program-Specific Professor, The Nippon Dental University School of Life Dentistry at Tokyo

Professor Emeritus, Tokyo Medical and Dental University