Corporate information


President’s message / philosophy Message

We are aiming to be a company that contributes to the orthodontic industry on a global scale

Aso International, Inc. was founded in 1982 and we celebrated its 39th anniversary in April 2020. We would like to express our deep gratitude to all of you for your continued support and cooperation.

Looking back at the time of establishment, I can clearly recall the beginning when I opened a dental laboratory specializing in orthodontics by myself in Sumida Ward, Tokyo. At that time, although I mainly made Study Models, it was far from the “smooth sailing start” I had wished for.
However, I firmly believed that the era of orthodontics would surely come to Japan in the future, and in order to learn a wide range of techniques and orthodontic technician knowledge, I actively participated in seminars and courses for orthodontists in the United States. By taking these courses, I intended to improve our qualifications as a laboratory specializing in orthodontics.
After that, we were able to steadily improve our business performance every year with the introduction of new customers.
 Currently, we have sales and manufacturing bases going from Hokkaido to Kyushu, and we are constantly expanding sales activities on a nationwide scale.
We do business with 28 national and private universities and many dental clinics that offer orthodontics as a medical treatment.

President Aso

Overseas, we have sales and manufacturing bases in Hawaii and Manila, and we would like to further focus on the overseas business development. In 2013, we acquired ISO 9001/13485 certification for the purpose of having thorough compliance and product quality assurance – we will strive to maintain and improve quality control and information security systems, and further improve our quality. The Niigata branch office was relocated as a large-scale factory in order to improve the quality and expand our production capacity.
Going forward, we are determined to contribute to the orthodontic industry on a global scale as ASO International, Inc., by introducing the latest orthodontic technologies and equipment and holding various orthodontic-related seminars.
We look forward to your continued patronage.

Toshimasa Aso

Company Profile

Company NameASO International, Inc.
LocationNo. 22 Chuo Bldg. 4F 2-11-8 Ginza, Chuo, Tokyo 104-0061 Japan
Phone Number+81 (03) 3547 0471 
Please use the ” Inquiry Form ” for inquiries and consultations.
Fax Number+81 (03) 3547 0475
Major Domestic Branch Offices[Niigata branch office]
2-10-16 Sasaguchi, Chuo-ku, Niigata-shi, Niigata 950-0911
Phone number: +81 (025) 278 8436 / FAX number: +81 (025) 278 8437

[Nagoya branch office]
Nagoya-shi, Aichi 460-0003 2-19-21.5F, Nishiki, Ward
Phone number: +81 (052) 201 5371 / FAX number: +81 (52) 201 5372

[Osaka branch office]
5-8-21 Nishinakajima, Yodogawa-ku, Nagoya 532-0011 
Phone number: +81 (06) 6886 2382 / FAX number: +81 (06) 6886 2383
CEOToshimasa Aso
Capital10,000,000 yen
Major banksBank of Tokyo-Mitsubishi UFJ / Mizuho Bank
MembershipsJapan Orthodontic Society
Japan Clinical Orthodontic Society
Japan Adult Orthodontic Society
Japan Lingual Orthodontic Society
Japan Clinical Orthodontic Society
Japan Sleep Dentistry Society IFUNA (International Functional Orthodontist Society)


Introducing ASO International, Inc.’s history

1982.04Toshimasa Aso establsihed ASO Dental, a laboratory specializing orthodontics.
ASO Dental was founded in Tokyo’s Sumida Ward as a one-person company. 
At that time, there were few places that practiced orthodontics, and in order to learn the skills and knowledge of orthodontic technicians, actively participated in domestic and overseas seminars. 
Improved the quality of our orthodontic laboratory.
1986.04Learned gnathological splints and positioners from Dr. Ross and Dr. Buster of San Francisco’s FACE, and soon after introduced them in Japan.
1988.05Reorganized into a joint-stock company and established “ASO DENTAL Co., Ltd.”
1992.06Company name changed to “Aso International, Inc.”
1996.05Moved the head office to the current location in Ginza, Tokyo.
1997.04Toshimasa Aso was appointed as a part-time lecturer at Saitama Dental Technician College.
2005.06Established ASO International Hawaii, Inc. as a production base for the United States.
2005.12Held the 1st Clear Aligner Seminar
Launched “Clear Aligner”, the first sequential mouthpiece-type orthodontic appliance in Japan.
2006.03Established ASO International Shanghai, Inc.
2007.11Established the Osaka branch office to improve our production base and service coverage in western Japan.
2007.11First Clear Aligner Seminar held overseas (Hawaii).
2008.02CAIC launched; Toshimasa Aso becomes chairman.
2008.02Organized a lecture to commemorate the inauguration of CAIC (Clear Aligner International Council).
2009.04First exhibit at the American Association of Orthodontists (AAO), the largest orthodontic society in the United States.
2010.04Relocated to make Niigata branch a large-scale production factory. 
Built a system for improving quality and expanding production capacity.
2010.04Relocated the head office to Ginza 3-chome.
Chairman of The Nippon Dental University Tokyo Junior College Alumni Association.
2010.07Renamed “Clear Aligner” to “AsoAligner”.
Developed an original production software, dramatically improving accuracy and productivity.
2011.04Obtained a patent for Hybrid Core in collaboration with Dr. Isao Matsuno, director of Akasaka Matsuno Dental Clinic.
2012.03Established the Nagoya branch office to improve service coverage in the Chubu area.
2012.07Established ASO International Istanbul, Inc. as a production base in Europe.
2013.04Obtained the international standard ISO13485. 
Strive to maintain and improve quality control and information security systems.
2015.04Expansion device Slidex. Obtained a patent jointly with Dr. Saiken Hoshioka.
2017.08Established ASO International Manila, Inc. to expand production base for overseas markets as part of our global expansion strategy.
2017.10Obtained MDSAP (TUV SUD), USFDA, and Philippine FDA, as well as the international standard ISO 13485. 
Built a system for thorough quality control.
2017.11Formed a business alliance with PWG of Canada to start production of Clear Bow, a transparent, aesthetic and durable retainer wire.
2018.04Launched “AsoAligner Digital” with improved accuracy by digitizing the production process.
2018.12Acquired manufacturing rights of HARMONY Lingual System from American Orthodontics in the United States.
2019.01Launch of “Full Digital Harmony”, which is completely digitized from design to production.
2020.12Launched customized bands designed with CAD and manufactured with metal printers.
2020.12Production and sale of lingual lock.

Overseas Network Network

Our overseas network helps us cover the Americas, Europe and Asia/Pacific markets ensuring all our products follow the same quality standard and timeliness guidelines.
Through our unique network, we guarantee an impecable customer service experience.



Introduction of our business divisions Our Business

Working in cooperation with an advisory group of specialists with a proven track record in orthodontic clinics, we are able to design more accurate orthodontic appliances.

If you don’t have enough experience with a particular case, or if you are a general dentist and would like to introduce orthodontic treatments, please use ASO’s technical support service.
Furthermore, with the aim of popularizing various orthodontic appliances and improving clients’ skills, we invite prominent teachers from Japan and overseas throughout the year to host and sponsor various seminars.

Please contact us for consultations and request for literature.

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