At E-Smile International Orthodontic Clinic, located in Umeda and Shitennoji, Osaka, our care team includes multiple practitioners led by Clinic Director, Dr. Hirohide Arimoto. As specialists in orthodontics, our doctors possess extensive knowledge, skills, and experience. They are committed to continuous professional development and personal engagement with each patient. This section provides a detailed introduction to Dr. Arimoto, our clinic director. Information regarding our other doctors is available on a private patient portal, accessible at the time of booking.

Orthodontic Specialist | Clinic Director

Hirohide ARIMOTO

Welcome to the School of Oral Power

I underwent orthodontic treatment myself from elementary through middle school, provided by my father, a specialist in orthodontics. At that time, I did not fully grasp the purpose of the apparatus I was wearing. Nonetheless, I was delighted when the devices were removed and I saw the beautiful transformation of my smile—particularly because I was raised by a loving grandmother who frequently gave me sweets, leading to extensive dental decay in most of my baby teeth. This experience opened my eyes to the transformative power of orthodontics; indeed, my life would have been vastly different without it.

Yet, orthodontic treatment is seldom enjoyable, right? While I am grateful to my father for his treatment, I did not find the process pleasant. Must it necessarily be so? An opportunity to visit an orthodontic clinic in the United States revealed a bright, enjoyable atmosphere, unlike any typical medical facility. It resembled a fun school, which left a profound impression on me. Shouldn’t a place where one goes with hopes of a brighter future be enjoyable and educational?

Motivated by this vision, I resigned from my university position and established my practice based on the concept of "The School of Oral Power." Our goal is to make each visit a pleasant and enlightening experience.


Born in Wakayama, Japan.
Graduated from Seifu Nankai Academy High School.
Graduated from Osaka Dental University; obtained dental license.
Completed postgraduate studies at the same university (Doctor of Dental Science in Orthodontics).
Certified as a Specialist by the Japanese Orthodontic Society.
Founded E-Smile Orthodontics in Tennoji, Osaka.
Founded Ashiya E-Smile Orthodontics in Ashiya City.
Incorporated as E-Smile International Orthodontics, a medical corporation.
Founded E-Smile International Orthodontics in Umeda, Osaka.

Professional Membership and Positions

Pursuing Excellent Treatment

Orthodontics as a Design Profession

When I entered dental school, I was relatively skilled with my hands, which led me to experience waxing up a full bridge during a student practicum. Crafting all the upper arch teeth in wax and seeing them perfectly fit the patient was immensely satisfying. I also earned praise from my instructors. However, this experience left me somewhat disappointed, as I realized that nothing could truly surpass natural dentition.

While general dental treatment focuses on restoration, orthodontic treatment is about leveraging the existing dental materials (teeth) to design something new. This realization drove me to pursue a postgraduate degree in orthodontics.
Wax-up refers to the dental model used to diagnose the shape, position, and occlusion of future restorations.

Encounter with Dr. Raphael L. Greenfield: The Challenge of Non-Extraction Treatment

While studying the fundamentals of orthodontics in graduate school and spending many late nights in the lab, I had the transformative opportunity to attend the first lecture in Japan by Dr. Raphael L. Greenfield, a leading figure in American orthodontic treatment. It literally shocked me. The cases he presented, which seemed only treatable by premolar extraction, were instead beautifully managed without extractions. Having undergone premolar extraction myself, I was particularly struck by Dr. Greenfield's CAD techniques, which were unlike anything I had seen before. Had these techniques been introduced earlier in Japan, perhaps I could have been treated without extractions.

The following year, I wrote a letter to Dr. Greenfield and applied to visit his clinic in Florida. It was my first time in America. Despite my limited English, Dr. Greenfield graciously allowed me to observe his practice from morning till evening for three days. Convinced that I needed to master this technique, I established the Japan Non-Extraction Orthodontics Study Group the next year and assisted in Dr. Greenfield’s courses, repeatedly learning from them.

Endorsed by the Angle Society

Embracing non-extraction treatment has often led to criticism, especially from those deeply entrenched in traditional orthodontic paradigms because it was so different from the orthodontic approach of the time. Notable university professors and distinguished clinicians have explicitly criticized non-extraction methods as preposterous. Amid such opposition, opportunities like being invited to deliver a lecture at the American Association of Orthodontists (AAO), receiving the Best Table Clinic Award at AAO, and publishing the book "Non-Extraction Orthodontic Treatment: The Reality of Molar Oriented Orthodontics" co-authored with Dr. Kousei Kaku and Dr. Noriyuki Shinohara, gradually led to wider acceptance of our methods. This acknowledgment paved the way for my membership in the Angle Society, a prestigious group of orthodontic specialists that can only be joined through existing member recommendation. I am immensely grateful to Dr. Koyama, Dr. Asai, and Dr. Alexander for their recommendations and sponsorship.

The Angle Society, founded by students of Dr. EH Angle, known as the father of modern orthodontics, is an elite group that includes only about 20 Japanese members among globally renowned educators and clinicians. My experiences there have profoundly influenced my clinical practice.

Orthodontic Treatment Combined with Periodontal Regeneration

At the Angle Society, I learned about innovative methods of accelerated orthodontics combined with periodontal regeneration treatments, developed by the Wilcko brothers, orthodontists and periodontists. This technique, known as Wilckodontics or Periodontally Accelerated Osteogenic Orthodontics (PAOO), is revolutionary for safely treating patients with thinning periodontal tissues. After attending a seminar by the Wilcko brothers in Erie, a small city by Lake Erie, USA, I have collaborated with Dr. Tomo Urano, a specialist in periodontology, allowing us to achieve treatment outcomes previously thought impossible.

Applying TADs in Orthognathic Treatment

A groundbreaking moment for me was encountering Dr. DeClerk's Bollard Plate at the Angle Society, which he used for treating underbites in children during their growth phases. Traditionally, skeletal underbites in pre-pubescent children were left untreated until post-growth, when surgical orthodontics was applied. However, Dr. DeClerk demonstrated cases where using the Bollard Plate during the pubertal growth phase significantly improved outcomes compared to later surgical interventions. Inspired by his lecture, I visited Dr. DeClerk's office in Brussels the following year to receive direct training. Additionally, I learned firsthand from Dr. Moon about combining the Maxillary Skeletal Expander (MSE) with a facemask to approach skeletal issues. These techniques, known as orthognathic treatments, when combined with traditional orthodontics, allow us to set more ideal treatment goals.

Oral Power: Maximizing Functionality, Aesthetics, and Sustainability

As we challenged ourselves with various techniques, the Angle Society also gave us an opportunity to think deeply about what is truly good treatment. Members are required to present case reports annually. “Legends” doctor like Dr. Alexander and Dr. Borel present cases with stability over 10 or even 20 years post-treatment—a critical measure of orthodontic quality. Seeing such enduring results and engaging in discussions with these experts have been invaluable. From these experiences emerged the concept of "Oral Power"—a fundamental idea of customizing and maximizing the balance between functionality, aesthetics, and sustainability through orthodontic treatment. This concept has become a major goal in my approach to orthodontics.

The Challenge of Aligner Orthodontics

While I have pursued what is a good treatment, I can not ignore the demand from patients for aesthetic considerations during treatment. Over the past decade, I have been challenging to achieve the quality of Molar Oriented Orthodontics (MOO) with aligners. Using Invisalign, a leading product from Align Technology, I aimed to deliver good treatment outcomes with aligners in most cases. Since the mechanics of aligners and traditional braces are quite different, mastering treatment with wires does not necessarily guarantee success with aligners. To keep up with advanced treatments abroad, I attended conferences in Germany and the USA to gather the latest information. Soon after, I was welcomed as a faculty member by Align Technology, where I now provide advice on various products. Today, I treat most cases with aligners.

Establishing MAO Academy and Providing Guidance

Aligner orthodontics can be easily initiated with just an intraoral scanner. However, this accessibility has led to a proliferation of low-quality orthodontic treatments by practitioners who lack even the basic knowledge of orthodontics. Concerned about this situation, together with my colleague Dr. Kousei Kaku, we founded the Molar Oriented Aligner Orthodontics (MAO) Academy. Our goal is to teach and promote high-quality aligner treatments that reflect the principles of MOO. Due to Japan's pharmaceutical laws, aligner orthodontics here lags about two generations behind the rest of the world. It is part of my mission to spread effective and high-quality aligner treatment methods, incorporating the latest information.

Our Vision at E-Smile International Orthodontics

Orthodontic treatment requires a high level of specialization. It is not merely about aligning teeth. It involves assessing each individual's skeletal structure, gum health and the quality of their teeth to set a sustainable and accurate goal that accommodates growth and aging. Achieving these goals necessitates the use of safe and reliable specialized techniques.

At E-Smile, we aim to be a clinic where patients can confidently receive excellent treatment. We strive to create an environment where the treatment journey is enjoyable and educational, supported by a knowledgeable team. Although challenges lie ahead, we are committed to enhancing the oral power of our patients, brightening their futures without fear of change, and embracing the ongoing evolution of orthodontic care.


Since 1996:

Instructor for the Greenfield Course. Certified as a specialist by the Japanese Orthodontic Society. Founder of the Japan Non-Extraction Orthodontics Study Group. Developed the Molar Oriented Orthodontics (MOO) diagnostic and treatment system, building on Greenfield's CAD system. Published "Non-Extraction Orthodontic Treatment - The Reality of Molar Oriented Orthodontics" with Ishiyaku Publishers.


Certified as a Fellow by the World Federation of Orthodontists.


Invited speaker at the American Association of Orthodontists conference in Philadelphia. In the same year, the Japan Non-Extraction Orthodontics Study Group received the Joseph E. Johnson Table Clinic Award.


Invited speaker at the first Italian Non-Extraction Orthodontics Conference.


Certified in Wilckodontics (PAOO) seminars.


Speaker at the Settling Philosophy International Conference.


Certified as a Regular Member of the EH Angle Society.


Special lecture at the 8th Kyushu Orthodontic Society Scientific Meeting.


Lecture at the 41st biennial meeting of the Angle Society. Hosted Non-Extraction MOO seminars in Japan, Italy, South Korea, India, and Hong Kong.

Since 2014:

Began treatment with MOO using mouthpiece orthodontics (Invisalign, exempt from pharmaceutical regulations) and orthodontic treatments incorporating near-infrared light. Lectured on these themes at the American Association of Orthodontists, the German Aligner Orthodontic Society, the French Aligner Orthodontic Society, the Taiwan Aligner Orthodontic Research Society, the Korean Orthodontic Society and the Japanese Society of Adult Orthodontics.

American Association of Orthodontists Best Table Clinic Award Awarded as the Japan Non-Extraction Orthodontics Study Group
Received a Certificate of Appreciation for a lecture at the University of Naples, Italy
Commemorative Lecture at the Publication of "Non-Extraction Orthodontic Treatment" (Published by Medical-Dental-Pharmaceutical Publishers)


Certified as an Invisalign Clinical Speaker by Align Technology.

Since 2019:

Faculty member at Invisalign Japan.


Inventor of EZ Attachment, EZ Mount, and Power Button.

Invisalign Faculty Certification

Teaching Activities

Instructor for Dr. Greenfield's CAD Technique Courses.
Instructor for Basic and Advanced CAD Seminars.
CAD Seminars at the University of Naples.
CAD Seminar at Kyung Hee University.
2007, 2008
CAD Seminars in Chennai, India.
Molar Oriented Orthodontics (MOO) Seminars.
MOO Seminar.
Founded and taught at MAO Academy.

Published Works

"Non-Extraction Orthodontic Treatment - The Reality of Molar Oriented Orthodontics (Ishiyaku Publishers, 2011)"

Co-authored by Hirohide Arimoto, Kousei Kaku, and Noriyuki Shinohara. This book, a comprehensive guide to non-extraction orthodontic treatment, is the only publication in Japan that consolidates the CAD techniques of Greenfield, adapted by the authors into the MOO technique.

"Advancing Beyond: Future-Oriented Dental Life (Ishiyaku Publishers, 2014)"

Co-authored by Hirohide Arimoto, Kousei Kaku, and Noriyuki Shinohara. Common knowledge abroad holds that Japanese = poor dental health. However Japan is said to have an excess of dentists. Improving the dental health of the Japanese population is the duty of Japan's dental professionals. This book, aimed at young dentists, offers guidance on enjoying a career in dentistry moving forward.

Key Publications

  • Kaku JK., Arimoto H., Shinohara N., Greenfield RL. "Use of Tip-Edge Brackets to Reduce Posterior Anchorage Requirements After Molar Distalization." Journal of Clinical Orthodontics. 2004; 38 (4): 320-324.
  • Hirohide Arimoto, Kousei Kaku, Shinohara Noriyuki. "Molar Oriented Orthodontics." Continuously featured in Dental Outlook from 2009, Issues 113(1) to 114(6).
  • Hirohide Arimoto, Kenji Kakudou. "Technological Innovations in Orthodontic Treatment and Paradigm Shift in Orthognathic Surgery - Minimal Interventions in Orthognathic Surgery." Journal of Orthognathic Surgery. 24(4): 285-297, 2014.
  • Hirohide Arimoto. "Considerations for Class II Treatment During Growth Phase in Molar Oriented Orthodontics." Orthodontic Yearbook 2015.
  • Hirohide Arimoto. "Two Cases of Pathological Tooth Movement and Maxillary Protrusion Due to Insufficient Alveolar Bone." Orthodontic Yearbook 2016.

Key Lectures and Presentations

  • American Association of Orthodontists 102nd Annual Session (May 6, 2002, Philadelphia) "Molar Position, Transverse Dimension, None-xtraction Treatment - Update of Cetlin Philosophy"
  • First International Congress La Terrapin Non Estrattiva secondo Norman Cetlin (June 1, 2007, Naples) "Insight of Cetlin Philosophy: Anti-Aging Effect Followed by Molar Oriented Strategy"
  • 24th Japanese Lingual Orthodontic Symposium (November 23, 2012, Osaka) "The Significance of PAOO for the Treatment of Malocclusions Relevant to the Life Stage"
  • 8th Kyushu Orthodontic Society Scientific Meeting (February 3, 2013, Kitakyushu) "Sustainable Orthodontics"
  • 23rd Japanese Society for Jaw Deformities Symposium (June 23, 2013, Osaka) "Periodontally Osteogenic Approach for Jaw Deformity of Alveolar Bone Insufficiency"
  • 9th Japanese Anti-Aging Dental Society Scientific Meeting (May 18, 2014, Osaka) "The Concept of Anti-Aging Orthodontics"
  • First Meeting of the Japanese Aligner Orthodontic Study Group (December 4, 2014, University of Tokyo) "What Aligners Can Do That Wires Cannot"
  • The Edward H. Angle Society 41st Biennial Meeting (September 26, 2015, Pasadena) "The Significance of PAOO for the Treatment of Malocclusions Relevant to the Life Stage"
  • Biolux Research Lectures (February 29, 2016, Hong Kong; November 20 and 21, 2017, Hong Kong; November 27, 2017, Singapore) "Introduction of Light Accelerated Orthodontics"
  • Taipei University Alumni Memorial Lecture of Professor Chen Kun Chih (August 26, 2018, Howard Civil Service International House, Taipei) "Accelerated Molar Oriented Aligner Treatment"
  • Invisalign Forum (September 9, 2018, Tokyo) "About Vertical Control in Aligner Orthodontics"
  • Japanese Clinical Implant Study Group (March 10, 2019, Kyoto) "What Invisalign Can and Cannot Do: Changes and Constants"
  • Memorial Meeting of 55th Anniversary Dental School UAEMex (June 10, 2019, Toluca City, Mexico) "Photobiomodulation with Aligner Treatment"
  • Turkish Aligner Society Congress (May 2, 2020, Online) "What Aligners Can Do and Wires Cannot"
  • Centre for Advanced Professional Practices (March 10, 2021, Online) "Tele-Orthodontics - Moving Your Practice Forward with AI"
  • Advanced Orthodontic Society (January 30, 2022, Waseda University International Conference Center, Tokyo) "Orthodontics in the Digital Age: Disruptions and Innovations"
  • Aligner Radio (June 15, 2022, Online) "The Power of Aligners as an Orthodontic Force"
  • Japanese Society of Adult Orthodontics (June 26, 2022, Tokyo) "Facial Aesthetics Patients Care About and the Occlusion Dentists Want to Correct"
  • Japanese Society for Craniofacial Surgery Symposium (November 18, 2022, Nagoya) "Orthodontic Aligners as a Force Manipulated by Orthodontists"
  • Advanced Orthodontic Society (January 28, 2023, Waseda University International Conference Center, Tokyo) "Effects of Orthognathic Treatment in Adult Orthodontics"
  • Japanese Digital Dental Society Winter Seminar (February 8, 2023, Online) "Conditions for Successful Aligner Treatment"

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