Located in the center of Nakano Ward, Tokyo, Seimei Internal Medicine is a clinic operated by the medical corporation Seifuukai specializing in internal medicine. The facility was incorporated as a medical corporation in May 2025 and provides medical services as a healthcare facility that local residents can use with peace of mind. The clinic offers English support and is fully barrier-free. For vaccinations, both COVID-19 and influenza vaccines are available, and simultaneous vaccination is possible without reservation. Two types of vaccines are provided: Pfizer's Comirnaty and Takeda's Nuvaxovid. Subsidies are available for residents of Nakano Ward aged 65 and older who meet certain conditions, reducing out-of-pocket expenses. Health checkups require appointments to reduce congestion in outpatient visits, and health checkups cannot be performed simultaneously with insurance-covered treatment. The clinic is closed during the year-end and New Year holidays, but holiday surcharges apply when treatments are performed on holidays such as December 29. The clinic operates without closure during the summer season, and during individual doctors' vacation periods, it operates with a single physician.