Matsui Clinic is located in Kusama-cho, Toyohashi City, Aichi Prefecture. This internal medicine clinic is a 6-minute walk from Minamisakae Station on the Toyohashi Railway Atsumi Line. Office hours are 9:00 AM to 12:00 PM Monday through Saturday, with additional hours from 4:00 PM to 6:30 PM on Monday, Tuesday, Wednesday, and Friday. The last morning appointment is at 11:30 AM. The clinic is closed on Sundays and holidays, with afternoon closures on Thursday and Saturday. The clinic also takes a 5-day break during year-end and New Year's as well as the Obon period. To reduce waiting times and alleviate congestion, the clinic has implemented a web-based queue management system. An online medical questionnaire service is also available for first-time patients and those visiting with new symptoms. Payment methods include credit cards and electronic payments. The facility has 11 parking spaces including affiliated parking lots. The clinic is barrier-free and provides services in English.