License and Board Certifications
1987- Japanese License; Registration No. 307893
1990- Board Certification of The Japanese Society of Internal Medicine
1994- Fellow of Japan Gastroenterological Endoscopy Society
1998- Fellow of The Japanese Society of Gastroenterology
2005- Fellow of The Japanese Society of Internal Medicine
2012- Fellow of The Japan Society of Hepatology
2013- Fellow of The Japanese Gerontological Association
2018- Fellow of The American College of Gastroenterology