SUMO OTHER BRANCHES: • SUMO Dubai Health Care City • SUMO Al Qasba, Sharjah • SUMO Masdar City, Abu Dhabi The Sumo Sushi and Bento concept restaurants were founded by a family of four entrepreneurs in 2000. Since then, Sumo Sushi and Bento has gained a reputation as a successful family business through its commitment to providing high quality menus, a warm and relaxing atmosphere and excellent service.