Located in Minami-Aoyama, Omotesando Helene Clinic is a medical institution specializing in internal medicine. The clinic offers multilingual support including English and accepts payments via credit cards, debit cards, and electronic payments. A notable feature of Helene Clinic is its mesenchymal stem cell (MSC) cultivation technology. The clinic has achieved the cultivation of 2.25 billion MSC cells, implementing a cultivation process using multi-layer culture flasks and their proprietary "Helene Proliferation Medium" with strict quality control. Ravindra Gupta, Professor of Clinical Microbiology at Cambridge University, has praised the clinic's cutting-edge technology and innovative approach. The clinic also focuses on the therapeutic potential of exosomes, with expectations for signal transduction and inflammation reduction, and has established rigorous purification and testing methods. The synergistic effects of stem cell therapy and exosomes are discussed as a possibility to enhance treatment outcomes. With these technological innovations, the clinic stands at the forefront of research and application in stem cell therapy.