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[Notice] Dr. Nagumo’s Research Paper Published in U.S. Medical Journal Cureus

A research paper on "Platelet-Rich Plasma (PRP) Therapy for Rotator Cuff Lesions" by our Medical Director, Dr. Kissho Nagumo, has been published in Cureus, an international peer-reviewed medical journal based in the United States.

■ Paper Title

"Short-Term Clinical Outcomes of Platelet-Rich Plasma Injections in Patients With Rotator Cuff Tendinopathy and Partial-Thickness Rotator Cuff Tears"

■ Authors

Kissho Nagumo (Director, NAG Orthopedic Clinic)
Hajime Inoue (Ginza Yoshie Clinic / Suiu Clinic Tokyo)

■ About Cureus

Cureus is an international, peer-reviewed medical journal based in the U.S. Only papers that pass rigorous review (peer review) by specialized physicians and researchers are published. It is indexed in "PubMed" and "PubMed Central (PMC)," world-leading medical literature databases operated by the U.S. National Library of Medicine (NLM), making it a highly reliable open-access medical journal widely recognized within the international academic community.

■ Publication Details

・Publication Date: March 25, 2026
・DOI: 10.7759/cureus.105855

■ Abstract / Overview

This study tracked and analyzed changes in pain scores (VAS) and shoulder function (Shoulder36) following PRP injections in patients treated at our clinic for rotator cuff tendinopathy or partial-thickness tears. The results confirmed significant pain reduction and improvement in shoulder function over a period of 1 to 3 months post-treatment, demonstrating that PRP therapy can be an effective treatment option.

▶ Click here to read the full paper (PDF in English)

Director of NAG Orthopedics: Yoshimasa Nagumo

南雲 吉祥

Orthopedic Specialist & Sports Doctor

Dr. Nagumo initially built his career as a surgical oncologist specializing in orthopedic cancer treatment. Subsequently, he moved to the United States to engage in advanced research in the field of regenerative medicine.

It was during his time in the U.S. that a personal injury led him to realize the critical importance of sports medicine. Upon returning to Japan, he transitioned his focus to become a sports orthopedic surgeon.

Currently, he leads the "Athlete Support Program," which provides comprehensive medical support to athletes using a combination of blood analysis and cutting-edge regenerative medicine technologies.

[Click here for the program introduction page:https://nagseikei.jp/en/dr/]