All our doctors speak English, although they are not native speakers, so their proficiency varies. Please note that some of our staff, including nurses and medical clerks, do not speak much English, so you may be assisted with translation software.
If you have any difficulties with English, please visit Dr. Iwahashi (the director) .
Dr. Iwahashi Yosuke, Hospital Director
Nov. 2025 (Koenji: Tue / Kojimachi: Sun, Mon & Thu)
Dec. 2025 (Koenji: Tue & Wed / Kojimachi: Sun, Mon & Thu)
From Jan. 2026 onward (Koenji: Wed / Kojimachi: Sun, Mon & Thu)
My name is Dr. Iwahashi, and I am the Director of HADA NO CLINIC, with locations in Koenji and Kojimachi, Tokyo.
Originally trained in general and cardiovascular medicine, my personal battle with acne inspired me to branch into dermatology about 20 years ago. Despite trying various treatments, my acne persisted until I discovered isotretinoin during a medical internship in the United States.
This treatment, which cleared my acne in just two courses, motivated me to bring it back to Japan, where I have since treated over 20,000 patients.
We offer comprehensive treatments for acne, AGA (hair loss), and skin issues like spots, warts, and scars using state-of-the-art laser technology. Our anti-aging treatments include Botox, hyaluronic acid injections, and HIFU for skin tightening.
We also offer popular treatments like weight loss therapy using GLP-1 receptor agonists (Mounjaro and Ozempic) and placenta injections, which are in high demand among international patients.
At our clinic, we create and prescribe gentle, preservative-free cosmetics tailored for sensitive skin and acne sufferers.
While our doctors speak English, fluency varies, and most of our staff do not. However, please feel free to reach out to me directly if you have any concerns. We look forward to welcoming you at HADA NO CLINIC!
From Yosuke Iwahashi, M.D.
| Short CV | Qualifications and Academic Affiliations |
|---|---|
| 2003 Graduated from Mie Univ School of Medicine Practical training at VA Palo Alto Health Care System 2003 Kanto Central Hospital 2006 Kosei Central Hospital and Dermatology, Yamaguchi Clinic 2015 Opened Medical Corporation HADA NO CLINIC | Board Certified Physician, Japanese Society of Internal Medicine Certified Medical Specialist, Japanese Society of Anti-Aging Medicine National Association of Placenta Therapy Research Physicians Chiyoda-ku Medical Association Advanced Specialist of Cosmetic Ingredients Test Japan Cosmetic Ingredients Certification Level 1 Qualified to administer Botox Vista |
Dr. Wakimizu Yoko, Deputy Director
Nov. 2025 (Koenji: Mon, Wed, Fri & Sat)
From Dec. 2025 onward (Koenji: Mon, Fri & Sat)
Hello. My name is Dr. Wakimizu, vice director of the clinic.
I entered medical school after graduating from pharmacy school, so I am licensed as both a pharmacist and a physician.
I have a long experience as a cosmetic dermatologist, and in addition to acne and AGA treatment, I have been involved in anti-aging treatments such as treatment with various lasers and injection of hyaluronic acid and Botox.
In recent years, the demand for cosmetic medicine has been increasing for both men and women, and the cosmetic medicine market is rapidly expanding. Medical devices and treatments are evolving daily, and it is believed that they are contributing to the resolution of many people’s skin problems.
However, it cannot be said that patient satisfaction has improved in response to the evolution of cosmetic medicine. This is because, while cosmetic medicine contributes to the resolution of patients’ problems, it is also a business that makes money from patients’ problems.
Some patients may have had the experience of being aggressively recommended expensive surgeries or treatments at beauty clinics. However, I myself am not comfortable recommending unnecessarily expensive cosmetic procedures to my patients and cannot force myself to advertise, etc. I gradually became conflicted about the situation I was in.
Cosmetic practice was interesting and I found it rewarding to be able to solve patients’ problems. However, although I had a passion to study more deeply, I was thinking of stepping back from cosmetic medicine after worrying about various issues.
Just at that time, I had the opportunity to talk to Director Iwahashi of this clinic. Witnessing his sincerity in his practice, his wealth of knowledge, and his insatiable inquisitiveness, I was able to make up my mind to continue practicing cosmetic medicine. I feel that it was a fortunate event that determined my way of life as a doctor.
We are constantly updating our practice by incorporating the latest findings from research and clinical experience into our evidence-based treatments. We do not recommend any treatment forcibly, and we will choose a treatment together with you according to your symptoms.
Because I have suffered through the lights and shadows of cosmetic medicine, I strongly feel the sincerity of our clinic, and I feel a mission to continue this sincere medical system in the future.
It would be my greatest pleasure as a physician if I could support your smile. Please feel free to contact us for consultation as we will make every effort to provide responsible and wholehearted medical care.
As for English, we still have a lot to learn and there are many things that we are not perfect in. We appreciate your understanding.
From Yoko Wakimizu, M.D.
| Short CV | Qualifications and Academic Affiliations |
|---|---|
| 2007 Graduated from Tokyo Univ of Pharmacy and Life Sciences, Faculty of Pharmacy 2011 Graduated from Gunma Univ School of Medicine Dermatology, Maebashi Red Cross Hospital Dermatology, Kyorin Univ Hospital Cosmetic dermatology at a clinic in Tokyo 2018 Medical Corporation HADA NO CLINIC | The Japanese Society of Dermatology Certified Medical Specialist, Japanese Society of Anti-Aging Medicine Board Certified Doctor, Japanese Society of Hot Springs and Climate Physics National Qualification as a Pharmacist Qualified to administer Botox Vista |
Dr. Sakima Taishi
Nov. 2025 (Koenji: Sun & Tue / Kojimachi: Tue, Wed, Fri & Sat)
From Dec. 2025 onward (Koenji: Sun & Tue / Kojimachi: Tue, Wed & Sat)
Hello, my name is Dr. Sakima. I have recently joined the HADA NO CLINIC.
I specialize in radiology, with expertise in anatomy, CT, MRI, ultrasound, and image-guided interventional procedures (IVR). I have extensive experience in diagnosing diseases, including cancer, performing catheter-based vascular treatments (excluding the brain and heart), and conducting biopsies on various organs.
For eight years, I served as a medical officer in the Japan Air Self-Defense Force, including two years in a remote island clinic, providing comprehensive care across dermatology and internal medicine. Having struggled with sensitive skin myself, I have always pursued the latest dermatological treatments.
I was drawn to Hada Clinic’s pioneering approach in introducing isotretinoin therapy for severe acne in Japan. I strongly resonate with its commitment to evidence-based, high-quality care in private practice.
I provide personalized treatments for acne and acne scars, including isotretinoin, hormonal therapy, lasers, and subcision. For AGA, I offer standard treatments such as finasteride, dutasteride, and minoxidil. With my expertise in anatomy and percutaneous procedures, I prioritize safety in injectable treatments like Botox and fillers. I also apply my knowledge of radiation physics to ensure safe and effective laser treatments for pigmentation and mole removal.
Beyond our clinic’s treatments, I am happy to advise on other procedures and general medical concerns. Feel free to reach out with any questions.
From Taishi Sakima, M.D.
| Short CV | Qualifications and Academic Affiliations |
|---|---|
| 2017 Graduated from the National Defense Medical College Boston Medical Center – Clinical Training 2017 National Defense Medical College Hospital 2018 Japan Self-Defense Forces Central Hospital 2019 Japan Self-Defense Forces Fukuoka Hospital 2020 National Defense Medical College Hospital 2024 Medical Corporation Hada Clinic | Board-Certified Radiologist, Japanese Medical Specialty Board Board-Certified Diagnostic Radiologist, Japanese Medical Specialty Board Member, Japanese Society of Interventional Radiology (IVR) Member, Japanese Radiological Society Certified Injector of Botox Vista® Certified Injector of Juvederm Vista® |
Dr. Yurie Yamazaki
Nov. 2025 (Kojimachi: Sat & Sun)
From Dec. 2025 onward (Kojimachi: Fri, Sat & Sun)
Hello, my name is Dr. Yurie Yamazaki.
I have worked as a cardiologist, focusing on precise catheter-based procedures, always placing the highest importance on accuracy and patient safety. One of the greatest rewards of my work has been seeing my patients regain their quality of life and watching their expressions and demeanor brighten over time.
I am also deeply drawn to aesthetic medicine because of its potential to improve not only appearance but also overall well-being and quality of life. Through aesthetic treatments, I hope to help patients live richer, more fulfilling lives.
In fact, I personally struggled with acne during my student days. I visited dermatology clinics and tried countless skincare products in search of effective solutions. Because of this experience, I understand how challenging skin concerns can be, and I am committed to offering compassionate care and effective treatments tailored to each individual.
During consultations, I take time to listen carefully to each patient’s concerns and work together to find the best treatment plan. By leveraging my background in internal medicine, I aim to approach aesthetic care from a comprehensive perspective, always staying updated on the latest knowledge and techniques. My goal is to support lasting beauty and health for every patient.
I strive to provide care that makes patients feel, “I’m glad I came here,” and “I want to come back again.” Please feel free to consult me about anything, no matter how small it may seem.
From Yurie Yamazaki, M.D.
| Short CV | Qualifications and Academic Affiliations |
|---|---|
| 2018 Graduated from Tokyo Women’s Medical University, Faculty of Medicine 2018 Tokyo Medical Center 2023 Keiyu Hospital 2025 Medical Corporation Hada Clinic | Board Certified Member, Japanese Society of Internal Medicine Board Certified Cardiologist, Japanese Circulation Society Member, Japanese Association of Cardiovascular Intervention and Therapeutics Member, Japanese Heart Rhythm Society |
Dr. Nahoko Matsui
Nov. & Dec 2025 (Koenji: Tue & Fri)
From Jan. 2026 onward (Koenji: Tue)
Hello, my name is Hanako Yamada, and I am a physician.
For more than ten years, I have worked as an internal medicine specialist at both university hospitals and community hospitals.
My philosophy as a doctor is: “Treat the person, not just the disease.”
Doctors sometimes become so focused on treating illnesses that we forget to truly see the person in front of us.
When I was younger, I once believed that if the test results improved, the patient must be satisfied as well—only to realize that what the patient truly wanted was something entirely different.
Each patient has their own background, family, work, and personal wishes.
While I always strive to respect those wishes, there are certain limitations within Japan’s public health insurance system.
Due to restrictions such as insurance coverage and patient volume, it is not always possible to fully meet every patient’s expectations, and medical appropriateness does not always align with patient satisfaction.
Skin concerns also vary greatly from person to person.
In particular, acne is something that most Japanese people experience at some point in their lives, and many have likely received insurance-based treatment for it.
However, even when those treatments achieve their intended results, they may not always fulfill every patient’s desired outcome.
At our clinic, acne treatment is provided based on clear medical evidence and a vast number of clinical cases accumulated since our opening, resulting in high patient satisfaction.
In our private (non-insurance) treatments, physicians conduct the counseling sessions directly.
By speaking with each patient personally, I aim to understand their concerns sincerely and work together toward the most suitable treatment.
Please feel free to reach out for a consultation.
From Nahoko Matsui, M.D.
| Short CV | Qualifications and Academic Affiliations |
|---|---|
| 2014 Graduated from Tokyo Women’s Medical University, Faculty of Medicine 2014 Tokyo Women’s Medical University Hospital 2023 Saiseikai Kazo Hospital 2025 Medical Corporation Hada Clinic | Board Certified Physician, Japanese Society of Internal Medicine Respiratory Medicine Specialist, Japanese Respiratory Society Certified Smoking Cessation Instructor, Japan Society for Tobacco Control Certified Occupational Physician, Japan Medical Association Member, Japanese Society of Aesthetic Internal Medicine Botox Vista® Injection Certification |
