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Adipose-Derived Stem Cell Therapy in Osaka: How the Process Works

Published 2026.10.14 7 min read

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

If you are exploring regenerative medicine while living in or traveling to Japan, one of the first questions is practical: what actually happens during adipose-derived stem cell therapy? This article walks through the typical sequence of steps, explains the ideas behind them, and lists questions worth bringing to a consultation at Grand Green Osaka Umekita Clinic in Osaka.

The short answer

Adipose-derived stem cell therapy is a regenerative approach in which mesenchymal stem cells are obtained from a small amount of your own fat tissue, cultured and expanded at a specialized facility, and later returned to your body by intravenous infusion. Because the cells come from you, the treatment is described as autologous. It is provided as a self-pay (non-insured) medical service, and whether it is appropriate for you can only be decided after an examination by a physician. It is not a replacement for standard medical care, and results differ from person to person.

Why fat tissue, and what are mesenchymal stem cells?

Stem cells are cells that can renew themselves and can develop into other cell types. Mesenchymal stem cells are a type of somatic stem cell found in tissues such as bone marrow and fat. In laboratory and clinical research they have been reported to differentiate into fat, bone, and cartilage cells, and to release anti-inflammatory molecules and growth factors that may support tissue repair.

Fat tissue is often chosen as a source because it is generally considered to contain a relatively large number of these cells, and it can be collected through a small incision under local anesthesia. Bone marrow collection, by comparison, usually places a greater burden on the body. Only a very small piece of fat, roughly the size of a few grains of rice, is needed to start the culture process.

The treatment flow, step by step

While details depend on your individual situation, the process generally follows these stages.

Consultation and examination: a doctor reviews your medical history, current conditions, and goals, and explains the treatment, its limits, and its risks.
Fat collection: a small amount of fat tissue is taken under local anesthesia on an outpatient basis, so hospitalization is not required.
Culture and expansion: the mesenchymal stem cells contained in the tissue are cultured and expanded at a specialized facility over a period of weeks.
Infusion: the cultured cells are administered by intravenous drip at the clinic, again as an outpatient visit.
Follow-up: your doctor checks how you are doing and discusses any concerns.

Because there is a culture period between collection and infusion, international patients should think about the timing of their stay in Japan, and ask the clinic how the schedule can be arranged around travel.

What is known and not yet known

Researchers around the world are studying mesenchymal stem cells, including cells derived from fat, in conditions involving inflammation and tissue damage. Published reviews describe encouraging signals in some areas, but they also point to differences in cell preparation methods, dosing, patient groups, and study design. This means findings from one study should not be generalized to every person or every condition.

It has been reported that infused mesenchymal stem cells can travel through the bloodstream and gather near sites of inflammation or damage, an effect often called homing. Even so, how much benefit any individual may experience is uncertain. Like any medical procedure, the treatment carries potential risks, including discomfort or bruising where fat is collected, and reactions related to the infusion. A doctor should explain these possibilities, and any others relevant to your health, before you decide.

How regenerative medicine is overseen in Japan

In Japan, cell-based regenerative treatments of this kind are provided under a framework set by the Act on the Safety of Regenerative Medicine. Clinics must prepare a treatment plan, have it reviewed, and submit it to the government before offering the treatment. This framework is intended to support transparency and oversight, but it does not mean that every outcome can be predicted. As a self-pay treatment, costs are not covered by public health insurance, so it is important to confirm the full fee structure before you begin.

If you receive care for another condition, tell your regular doctors about any regenerative treatment you are considering. Stem cell therapy should be discussed alongside, not instead of, the standard treatments recommended for your condition.

Questions to ask before your consultation

Going into an appointment with a clear list can make the discussion more useful. Consider asking the following.

Is this treatment suitable for my condition, and are there reasons I might not be a candidate?
What are the possible risks and side effects, and what happens if I have a problem after returning home?
What is the total cost, including consultation, collection, culture, and infusion, and how many visits are needed?
How long does the culture period last, and how should I plan travel dates?
Which standard treatments should I continue, and how will this fit with my current care?

Grand Green Osaka Umekita Clinic is located in the Umeda area of Osaka and offers an information page for international patients in multiple languages. You can use it to find consultation options before visiting. For fees, treatment details, and risks specific to adipose-derived stem cell therapy, please refer to the treatment page and confirm everything with a physician during your consultation.

Understanding the process step by step will not answer every question, but it can help you decide what to ask and whether a consultation makes sense for you. A careful conversation with a doctor, based on your own health and expectations, is the right place to start.

Treatment Process Overview

1ConsultationDoctor reviews your history
2Fat collectionLocal anesthesia, outpatient
3Cell cultureExpanded over a period of weeks
4IV infusionOutpatient drip at the clinic
5Follow-upDoctor checks how you are doing

This diagram is a conceptual summary of the article content

Learn more about Adipose-Derived Stem Cell Therapy

References

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.

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