MARU by Tokyo Business Clinic is an internal medicine clinic specializing in preventive medicine, conveniently located just a 3-minute walk from JR Tokyo Station in Marunouchi, Tokyo. Established as a spin-off of Tokyo Business Clinic, which has supported the health of business professionals in the Marunouchi-Otemachi area since 2016, the clinic operates under the philosophy of "making healthy people even healthier." It provides comprehensive support ranging from early disease detection and prevention to performance enhancement for healthy business professionals. The clinic is open 365 days a year from 9 AM to 9 PM with no appointment required and minimal waiting times, making it easily accessible for busy professionals. In addition to vaccinations, travel medicine consultations, and quick health checkups, the clinic offers IV drip services including shiratama beauty injections, placenta injections, and garlic injections, allowing patients to address both preventive healthcare and beauty/performance maintenance in one location. The clinic accepts credit cards and electronic payments, and is equipped with barrier-free facilities and parking. With locations in both Tokyo Marunouchi and inside Chiba Station, the clinic serves as a healthcare facility that comprehensively supports the health maintenance of urban workers.