The ranking of agencies for medical treatment in Japan is as follows:

1. Japan Medical Consultation Center: This organization was established in 2005 and is one of the earliest medical consultation organizations in Japan. The institution has a professional medical team that provides a full range of medical services, including medical consultation, translation, appointment registration, medical escort and other services. The agency's service quality and credibility have been highly praised by customers.

2. Japan Medical Tourism Center: This organization was established in 2010 and is one of the largest medical tourism organizations in Japan. The institution has abundant medical resources and a professional medical team, providing one-stop services including medical consultation, appointment registration, translation, accommodation, transportation, etc. The agency's service quality and price transparency have been recognized by customers.

3. Japan Medical Service Center: This organization was established in 2012 and is an organization focused on providing medical services to overseas patients. The institution has a professional medical team and rich medical resources, including medical consultation and appointment registration.

Others:

In addition to the above three institutions, there are also some other institutions that also occupy a certain share in the Japanese medical intermediary market, such as Japan Medical Navigation Center, Japan Medical Service Network, etc. .

In general, choosing a good Japanese medical treatment agency requires comprehensive consideration of various factors, including service quality, medical resources, price transparency, credibility, etc. At the same time, you also need to choose the institution that best suits you based on your specific circumstances and needs.