There is a physiotherapy/rehabilitation clinic located near the Marutamachi Onmaedoori bus stop (called Futaba). This clinic does not offer English services, but the staff are very patient and kind, therefore even with limited Japanese ability and use of body language, they will be able to treat you. They deal with sports related injuries, extensive pain after surgeries, and many other problems. No appointment required, walk-ins welcome. Price is approximately 1500 yen (inclusive of electro-therapy, strapping and massage).