Oasis Daiichi Hospital, operated by Medical Corporation Zen-shokai, is located in Higashi-Tsurusaki, Oita City, Oita Prefecture, providing community-based internal medicine care. Centered on general internal medicine, the hospital offers specialized departments including cardiology, gastroenterology, respiratory medicine, and neurology. It handles a wide range of conditions from infectious diseases such as influenza and pneumonia to lifestyle-related diseases like hypertension, diabetes, and dyslipidemia. Consultation hours are from 9:00 AM to 6:30 PM on weekdays, with Saturday consultations also available. A distinctive feature of the hospital is its home visit services, including home medical examinations, home nursing, and home rehabilitation, supporting patients and elderly individuals concerned about recuperating at home. Social workers are available to consult on the use of long-term care insurance services. The facility is equipped with parking and barrier-free access. Payment methods include credit cards and electronic payments for convenience. English assistance is available. The hospital is closed on Sundays and public holidays, as well as during the New Year and Obon periods. The hospital aims to provide attentive medical care tailored to each patient, with a system designed to meet the healthcare needs of the community.