Hello, I am Dr. Hidenori Shimada of Grand Green Osaka Umekita Clinic in Osaka, Japan.
If you are researching regenerative medicine in Japan, one of the first practical questions is whether the national health insurance system covers it. For adipose-derived stem cell therapy offered at Grand Green Osaka Umekita Clinic, the answer is that it is provided as a self-pay treatment (not covered by insurance). This article explains what that means, how the treatment is regulated, and which questions are worth bringing to your consultation.
The short answer: self-pay, not insurance-covered
In Japan, standard medical care is largely delivered under a public insurance framework in which treatments and prices are set nationally. Many regenerative medicine treatments, including therapies that use a patient’s own cultured mesenchymal stem cells, fall outside that framework. They are offered as self-pay medical care, which means the patient bears the full cost and the clinic sets its own fee structure.
Being self-pay does not by itself say anything about whether a treatment is suitable or unsuitable for you. It simply means that the usual insurance review process does not apply, so it is even more important to understand the treatment, its limits, and its risks before deciding. Whether the therapy is appropriate for your situation can only be determined by a doctor after an individual consultation.
What the treatment involves, in brief
Adipose-derived stem cell therapy is a regenerative approach in which a very small amount of your own fat tissue is collected under local anesthesia. The mesenchymal stem cells contained in that tissue are then cultured and expanded at a specialized facility, and the cultured cells are returned to your body by intravenous infusion. Both the collection and the infusion are performed on an outpatient basis, without hospitalization.
Mesenchymal stem cells have been reported in research to secrete anti-inflammatory substances and growth factors that may support the repair of damaged tissue. However, research is still developing, results in studies vary, and individual outcomes cannot be predicted or promised. This is another reason a careful, doctor-led discussion matters more than any general description.
How Japan’s regenerative medicine law fits in
Self-pay does not mean unregulated. In Japan, regenerative medicine that uses cultured cells is subject to the Act on the Safety of Regenerative Medicine. Under this framework, a medical institution plans the treatment, and the provision plan is reviewed by a designated committee and submitted to the Ministry of Health, Labour and Welfare before treatment can be offered. Cell processing is also expected to take place at facilities that meet defined standards.
This system is designed to add oversight and transparency, but it should not be read as a statement that a treatment works or that it is free of risk. It is better understood as a set of procedural requirements that you can ask the clinic about. A reputable clinic should be willing to explain which plan covers the treatment you are considering and how cell processing is managed.
Questions to ask about fees and what is included
Because the clinic sets its own pricing, comparing offers is difficult unless you ask the same questions each time. Fees, number of treatment sessions, and the overall treatment period should be confirmed directly with the clinic and the doctor, rather than assumed from general information online. The following points can help you structure that conversation.
- What exactly is included in the quoted fee, such as the consultation, fat collection, cell culture, and infusion?
- Are there separate charges for tests, follow-up visits, or additional infusions?
- How many visits are expected, and how much time should you plan to spend in Japan?
- What happens if the doctor decides after examination that the treatment is not appropriate for you?
- How are cancellations or delays in cell culture handled?
Asking for these details in writing, in a language you are comfortable with, makes it easier to compare options and to avoid misunderstandings later.
Risks, side effects, and your existing care
Every medical procedure carries potential risks. Fat collection involves a small incision and local anesthesia, and intravenous infusion of cells can, in principle, be associated with reactions such as discomfort at the site, fever, or allergic-type responses. Because the cells come from your own body, the risk of rejection is considered lower than with donor cells, but that does not mean there is no risk. Your doctor should explain possible side effects and how they would be handled before you decide.
It is also important to see regenerative medicine as a complement to, not a replacement for, standard medical care. If you are currently being treated for a condition at home, tell the doctor in Osaka about your diagnosis, medications, and past treatments, and consider informing your regular physician about your plans. A clear picture of your medical history helps the doctor judge whether this therapy is appropriate at all.
Consulting in Osaka as an international patient
Grand Green Osaka Umekita Clinic is located in the Umeda area of Osaka, which is easy to reach from Kansai International Airport and from other major Japanese cities. The clinic provides an information page for international patients, so you can review the treatment overview, flow, and frequently asked questions in advance and then prepare your own list of questions.
A practical approach is to start with the clinic’s published information, write down your medical history and your goals for consultation, and then discuss them with a doctor. The consultation is the point at which eligibility, expected benefits and limits, risks, side effects, fees, and the treatment schedule can be explained for your individual situation. Taking time to understand these points before committing will help you make a decision that fits your circumstances.
Key takeaways
Adipose-derived stem cell therapy in Japan is generally a self-pay treatment that is provided under the Act on the Safety of Regenerative Medicine. Self-pay status means you should look closely at what is included in the fee, what the risks and side effects are, and how the treatment relates to the care you already receive. Nothing about the treatment can be promised in advance, and suitability is decided by a doctor after examination. If you are considering a consultation in Osaka, use the clinic’s information pages to prepare, and bring your questions to the doctor.
- Self-pay treatmentNot covered by insurance
- Regenerative medicine lawProvision plan and oversight
- Ask about feesWhat is included
- Doctor consultationSuitability and risks
This diagram is a conceptual summary of the article content
References
- PMC: Collecting Eggs, Not Killing Chickens: Why Stem Cell Secretome and Exosomes Are Redefining Regenerative Medicine for Healthspan Extension. (2026)
- PMC: Poster Session Abstracts. (2016)
- PMC: ACTS Abstracts. (2014)
- PMC: UEG Week 2019 Poster Presentations. (2019)
- MHLW (Japan): Regenerative Medicine — Ministry of Health, Labour and Welfare, Japan
Supervising Physician
Director, Medical Corporation Shimada Clinic
Head of Clinical Practice, Grand Green Osaka Umekita Clinic
Hidenori Shimada
Graduated from the University of Tokushima Faculty of Medicine in 2005. After his initial residency, he obtained U.S. medical certification (ECFMG) and trained as a sub-intern in general surgery at the University of Washington. After completing the doctoral program at Kyoto University Graduate School of Medicine and working as a researcher at the Center for iPS Cell Research and Application (CiRA), Kyoto University, he founded Shimada Clinic in 2013. At Grand Green Osaka Umekita Clinic (https://umekitaclinic.org), he is engaged in a wide range of care, from internal medicine and pediatrics to cell therapy and aesthetic medicine.
* The physician supervision of this article covers its academic content only and does not constitute a recommendation of any specific treatment or product.