Keio University Hospital (Keio University Hospital) is a famous large hospital in Japan known as Kei Hospital or Qingda Hospital. Keio University Hospital was established in 2009.

  Keio University Hospital is a well-known large hospital in Japan. The hospital established a cancer center in 2009 and studied liver cancer treatment. The hospital has 29 clinics and 17 central clinics. The cumulative number of foreign patients was 797,263, and the average number of foreign visitors was 2,964. In 2009, the first liver transplant in the world, the first successful liver transplant, was held in the hospital, and in 2013, the world's first hearing-impaired oral cell renewal surgery was successful at the hospital. The most important feature is that it has a department of minimally invasive treatment research and development for the development of new technologies and equipment for minimally invasive cancer treatment, and has accumulated abundant experience by successfully developing numerous new treatment methods and tools. In the treatment of digestive system tumors, minimally invasive surgery can be used, regardless of the size and location of the tumor, as long as there is no lymph node metastasis. Yasuo Naoki is one of the renowned ESD developers with over 10 years of clinical experience and amazing performance.