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Fat or Bone Marrow? Choosing a Stem Cell Source in Osaka

7 min read

Hello, I am Dr. Hidenori Shimada of Grand Green Osaka Umekita Clinic in Osaka, Japan.

If you are researching regenerative medicine in Japan, you may have noticed that mesenchymal stem cells can come from more than one tissue. Two sources are discussed most often: bone marrow and adipose (fat) tissue. This article explains why Grand Green Osaka Umekita Clinic uses fat tissue for its adipose-derived stem cell therapy, what that choice means in practice, and which questions are worth raising with a doctor before you travel.

In short, adipose tissue is considered to contain a relatively abundant supply of mesenchymal stem cells and can be collected with a smaller burden on the body than bone marrow. That is a practical advantage, not a guarantee of any result. This treatment is a self-pay (non-insured) medical service, and whether it is appropriate for you can only be decided after an individual consultation with a physician.

What are mesenchymal stem cells?

Stem cells are the cells the body uses to renew and repair its tissues. They have two defining abilities: they can replicate themselves, and they can differentiate into other cell types. Mesenchymal stem cells (MSCs) are a type of somatic stem cell found in fat tissue, bone marrow, and other places. They can differentiate into fat, bone, and cartilage cells.

In addition, MSCs have been reported in research to release anti-inflammatory substances and growth factors that may support the repair of damaged tissue. Studies are continuing around the world, and the evidence differs between conditions. It is therefore sensible to treat MSC therapy as an area of active research rather than a settled cure for any disease.

Why fat tissue instead of bone marrow?

Bone marrow was one of the first recognized sources of MSCs, and it is still used in research. However, collecting bone marrow places a significant burden on the body. Adipose tissue is generally regarded as containing more mesenchymal stem cells than bone marrow, and it can be collected through a small incision under local anesthesia.

According to the clinic’s treatment information, only a very small amount of fat, roughly a few rice-grain-sized pieces, is needed. These are general trends rather than a promise about how your own cells will behave. The number and quality of cells can vary from person to person, so the doctor will explain what is realistic in your case.

What does using your own cells mean for you?

The therapy at Grand Green Osaka Umekita Clinic is autologous, meaning the cells come from your own body. Because the cultured cells are your own, the risk of rejection or allergic reaction is considered lower than with donor cells or artificial materials. Lower risk does not mean no risk, and side effects or complications can still occur.

The basic steps are as follows.

  • A small amount of fat tissue is collected under local anesthesia on an outpatient basis.
  • The mesenchymal stem cells in the tissue are cultured and expanded at a specialized facility.
  • The cultured cells are returned to your body by intravenous (IV) infusion, also as an outpatient procedure.

Because the process is outpatient, no hospital stay is required, and treatment can often be arranged around work or travel. Culture takes time, so international patients should ask early about the overall schedule and whether more than one visit to Osaka is needed.

How is this treatment provided under Japanese law?

In Japan, regenerative medicine that uses cultured cells is regulated under the Act on the Safety of Regenerative Medicine. Clinics must prepare a treatment plan, have it reviewed, and submit it to the authorities before offering the therapy. The clinic states that its treatment is provided under a regenerative medicine provision plan in line with this system.

This framework is about safety management and transparency. It does not mean the therapy is covered by national health insurance, and it does not mean that effectiveness has been established for every use. Patients are encouraged to ask the clinic to explain the plan, the intended use of the cells, and any information about risks.

What should international patients ask before booking?

Choosing a cell source is only one piece of a larger decision. Medical travel adds practical questions, and a clear conversation with the doctor helps you decide whether to proceed. Consider preparing questions such as the following.

  • Is my condition suitable for adipose-derived stem cell therapy, and what are the reasons it might not be?
  • What are the possible risks and side effects of fat collection and IV infusion?
  • What would the total schedule look like, including culture time and any follow-up?
  • What are the fees, and what is included? Costs should be confirmed directly, because they are not covered by insurance.
  • How does this fit with the standard treatments I am already using, and should I keep them in place?

Stem cell therapy should not replace standard medical care that your own doctors recommend. Bring your medical records or a summary in English if possible, and tell the clinic about any medicines you take, past surgeries, and allergies.

Plan your consultation in Osaka

Grand Green Osaka Umekita Clinic is located in Umeda, Osaka, and offers consultations for patients considering regenerative medicine. The clinic also provides a page of information for international patients in multiple languages, which can help you prepare before contacting the clinic.

Fat tissue is a practical source of mesenchymal stem cells because collection is relatively gentle, but only a physician who has examined you can judge whether this approach is suitable. Please confirm the indications, fees, treatment period, risks, and side effects at your consultation, and take your time to compare options before you decide.

Learn more about Adipose-Derived Stem Cell Therapy

References

Supervising Physician

Hidenori Shimada

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.

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