Located in Isawa-cho, Fuefuki City, Yamanashi Prefecture, Kurosawa Naika is a community-based clinic offering a wide range of services from internal medicine and gastroenterology to pediatric outpatient care. The general internal medicine department addresses everyday healthcare needs, from acute conditions such as colds and influenza to chronic disease management including diabetes, hypertension, hyperlipidemia, and bronchial asthma, as well as various vaccinations. A notable feature of the clinic is its comprehensive gastroenterology services, equipped with abdominal ultrasound, gastroscopy, and colonoscopy, while also offering same-day outpatient surgery for colon polyps. The clinic covers a broad spectrum of digestive disorders, including Helicobacter pylori eradication therapy, gastroesophageal reflux disease (GERD), gastric and duodenal ulcers, and even the diagnosis and treatment of gastrointestinal cancers such as esophageal, gastric, colorectal, liver, and pancreatic cancer, along with a specialized constipation clinic. Gastrointestinal examinations are primarily scheduled on Friday mornings, though the clinic accommodates other dates based on patient convenience, ensuring flexible appointment options. Abdominal ultrasound and gastroscopy appointments can be made by phone, while colonoscopy requires an initial visit for a thorough examination explanation before scheduling. The facility is barrier-free with parking available, creating an accessible environment for elderly patients and those with physical concerns. The clinic is closed on Wednesdays, Sundays, national holidays, and during the year-end/New Year and Obon periods.