Aozora International Clinic, located in Sakae-cho, Tachikawa City, Tokyo, is an internal medicine clinic specializing in house calls and telemedicine available during nighttime and holidays. Operating hours run from 9 PM to 5 AM the following morning—an unconventional schedule that ensures patients can receive care when feeling unwell late at night. The clinic's director is a board-certified emergency physician and authorized instructor in aviation medicine, providing expert clinical judgment for mild to moderate acute illnesses. The house call service covers a broad area including all of Tokyo, eastern to central Kanagawa Prefecture, and Chiba City as well as Narita City, with visits available directly to hotels and other accommodations. Telemedicine consultations are available nationwide across Japan, and prescriptions can be sent directly to pharmacies. When necessary, the clinic can also issue referral letters to emergency hospitals and medical certificates in English, offering comprehensive support with medical documentation. Payments can be made in cash, by credit card, or via electronic payment, allowing fully cashless settlement. As the clinic operates strictly by appointment, prior contact is required before visiting.