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PRP vs. Stem Cell Therapy: Understanding Your Options in Japan

Published 2026.09.18 7 min read

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

Regenerative medicine is gaining attention as a field that utilizes the body’s own healing capabilities. Among the available options, Platelet-Rich Plasma (PRP) therapy and Adipose-Derived Stem Cell (ADSC) therapy are two prominent choices, particularly for conditions like osteoarthritis and joint pain. While both fall under the umbrella of regenerative treatments, they operate on fundamentally different principles and involve distinct processes.

The core difference lies in what is being administered. PRP therapy uses concentrated platelets and growth factors from your blood to signal and stimulate the body’s repair processes. In contrast, adipose stem cell therapy involves harvesting, culturing, and administering mesenchymal stem cells from your fat tissue, which may directly support tissue repair and modulate inflammation. Understanding this distinction is the first step toward making an informed decision with your physician.

Understanding Your Options in Regenerative Medicine

If you are dealing with chronic joint pain, such as knee pain from osteoarthritis, or recovering from a sports-related injury, you may be exploring treatment options beyond conventional approaches like medication or surgery. It’s common to wonder which advanced therapy might be more suitable. This article aims to clarify the differences between PRP and adipose stem cell therapy to help you prepare for a consultation with a specialist.

What is Platelet-Rich Plasma (PRP) Therapy?

PRP therapy is a procedure that uses a concentration of a patient’s own platelets to support the healing of injured tissues. The process is relatively straightforward.

Collection: A small sample of your blood is drawn, similar to a routine blood test.
Processing: The blood is placed in a centrifuge to separate the platelets from other blood components, creating a concentrated plasma rich in platelets.
Application: This platelet-rich plasma is then injected into the targeted area, such as an arthritic knee joint.

The therapeutic concept behind PRP is that platelets contain hundreds of proteins called growth factors. These growth factors play a crucial role in the body’s natural healing cascade. By delivering a high concentration of these factors directly to an area of injury or degeneration, the goal is to stimulate and enhance the local repair process. It acts as a biological stimulant rather than introducing new cells with regenerative capabilities.

What is Adipose-Derived Stem Cell (ADSC) Therapy?

Adipose-derived stem cell therapy is a more complex process that utilizes mesenchymal stem cells (MSCs) found in your fat tissue. MSCs are multipotent cells, meaning they have the potential to develop into various cell types. More importantly, they are known to secrete a wide range of substances that can help calm inflammation, support the repair of damaged tissue, and modulate immune responses.

The treatment process typically involves:

Harvesting: A small amount of fat tissue is collected from an area like the abdomen or thigh under local anesthesia.
Culturing: The harvested tissue is sent to a specialized cell processing facility where the MSCs are isolated and cultured to increase their numbers over several weeks.
Administration: The expanded population of stem cells is then returned to the body, often via an intravenous (IV) infusion or a direct injection into the affected area.

Unlike PRP, which primarily provides signaling molecules, ADSC therapy introduces a population of active cells that may contribute to the tissue environment in multiple ways, including anti-inflammatory and regenerative support actions.

Key Differences: PRP vs. Adipose Stem Cell Therapy

When comparing these two regenerative medicine options, several key distinctions emerge:

Source Material: PRP is derived from blood, while ADSC therapy uses stem cells from fat tissue. Fat tissue is considered a particularly abundant source of mesenchymal stem cells.
Mechanism of Action: PRP relies on growth factors to stimulate the body’s existing repair mechanisms. Stem cells, on the other hand, are thought to have a more multifaceted role, including reducing inflammation, promoting tissue repair through secreted factors (trophic effects), and potentially differentiating into new cells.
Treatment Process: PRP therapy can often be completed in a single visit. ADSC therapy is a multi-step process that requires time for cell culturing and expansion, typically spanning several weeks from fat collection to cell administration.
Cellular Component: PRP is an acellular product containing platelets and growth factors. ADSC therapy involves administering living, cultured stem cells.

Making an Informed Decision: What to Discuss with Your Doctor

Choosing between PRP and adipose stem cell therapy is not a decision to be made alone. A thorough medical evaluation is essential. The suitability of either treatment depends on your specific diagnosis, the severity of your condition, your overall health, and your treatment goals. A physician will determine eligibility based on a comprehensive examination and review of your medical history.

It is important to understand that both PRP and adipose stem cell therapy are considered non-insured medical care (free practice) in Japan. In Japan, treatments using cultured stem cells, such as ADSC therapy, are provided under the regulations of the Act on the Safety of Regenerative Medicine. This legal framework ensures that treatments are conducted according to approved plans and with strict safety management. During your consultation, you should receive a detailed explanation of the expected outcomes, the number and frequency of treatments, potential risks, and associated costs.

Your Next Step in Exploring Regenerative Medicine in Osaka

Both PRP and adipose stem cell therapy represent promising approaches in regenerative medicine, but they are not interchangeable. PRP offers a method to concentrate the body’s natural healing signals, while ADSC therapy provides a treatment based on the versatile functions of mesenchymal stem cells. The most appropriate path forward can only be determined after a careful medical assessment.

At Grand Green Osaka Umekita Clinic, we provide consultations to help patients understand their options. For those interested in learning more about the specifics of our approach to stem cell therapy, including the process from cell collection to administration, detailed information is available on our Adipose-Derived Stem Cell Therapy page. We are committed to helping you explore treatment possibilities based on a clear understanding of the science and regulatory standards in Japan.

If you are considering regenerative medicine options for joint pain or other conditions, we encourage you to consult with a medical professional. For more details on our adipose stem cell therapy, please see our dedicated page: Adipose-Derived Stem Cell Therapy at Grand Green Osaka Umekita Clinic.

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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