The Chinese character, “未” means both “sheep” and “yet to / pre.” At SheepMedical, we operate under the symbol of the sheep. With preventative care at our core, we are creating health solutions for today’s problems, and anything tomorrow brings.  

We're a medical technology company promoting the digital transformation of orthodontics and preventative care. Our story began with the fastest aging, but healthiest population in the world – Japan. With our preventative care model, SheepMedical provides health services to extend global life expectancy.

SheepMedical was founded in 2017. Our unique perspective on aging populations challenges the increasing global medical costs associated with preventable health issues. We continue to offer patients advanced health benefits and first-class care as we strive for longer life spans across the globe.  

Company Profile

Company Name

SheepMedical Co., Ltd.

Registered Head Office/Dental Laboratory

4-3-28, Nishidai, Itabashi-ku, Tokyo


4F Sasakiselm Building,  2-9-16 Sen-i, Ichinomiya-shi, Aichi


1-5 Uguisudani-cho, Shibuya-ku, Tokyo


Room 207, Yokohama  Industry-Academia Joint Research Center, 1-1-40 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa


March 2017

Number of employees



Naozumi Matsumoto

Domestic subsidiaries

SheepMedical Technologies Co., Ltd.

Al D-baran Co., Ltd.

Global Subsidiaries

Smile Design Vietnam Co. Ltd.
Dental Assist Philippines Inc.
SheepMedical (Thailand) Company Limited
SheepMedical Pte. Ltd. (Singapore)
SheepMedical Taiwan Co., LTD.
SheepMedical (China) Co. Ltd.
SheepMedical India Private Limited
PT. SheepMedical Group Indonesia
SheepMedical USA Inc.

Proudly Recognized By

Leadership Team


Naozumi Matsumoto
Chief Executive Officer

Naozumi founded Dental Assist Co., now SheepMedical, in 2017 to increase access to affordable orthodontic treatments. Throughout his medical career he has established 35 cosmetic surgery and medical hair removal clinics in Japan. He leverages his business and healthcare experience to drive the advancement of medical technology across the globe.  

Naozum earned his medical license from the Saga University School of Medicine.  

Yusuke Masai

Yusuke is the director of SheepMedical. He opened his first dental clinic at 27,three years after graduating from the school. In five years, he grew the clinicinto the first nationwide chain of franchised dental clinics in Japan andexpanded overseas to Dubai, Scandinavia, and Western Asia. He is also an equityinvestor and entrepreneur in various fields such as medical DX business,medical M&A, blockchain and food service business. He has served as anadvisor, CXO, and mentor for many healthcare companies, start-ups anduniversity-industry collaborations. He has notable knowledge and achievementsin multi-storefront dental clinic and online dental business.Graduated from Tohoku UniversitySchool of Dentistry. 


Takuya Kiriyama
Chief Global Strategist

Prior to joining SheepMedical, he spent six years in management consulting at Bain & Company, a global management consulting firm. Takuya engaged in the infrastructure development of the Economic Research Center for East Asia and ASEAN, an international organization in Indonesia.  

Takuya earned his Bachelor of Arts in Economics from the University of Tokyo
and graduated from the Northwestern University Kellogg School of Management.  


Hideki Maruyama
Chief Financial Officer

Hideki Maruyama is the chief financial officer of SheepMedical, overseeing the accounting and finance departments.

Hideki was an M&A advisor at PricewaterhouseCoopers (PwC), a leading auditing and consulting firm, where he worked on domestic and international financial advisory projoects, which included a stint in the United Kingdom. He previously worked with the Australian Embassy in Tokyo.  Hideki earned his Bachelor of Commerce from the University of Sydney.  


Shinya Tabata
Chief Strategy Officer

Shinya Tabata is the chief strategy officer of SheepMedical where he leads the promotion of corporate development. 

Early in his career, he spent time in theM&A advisory division at Daiwa Securities SMBC, before joining theinvestment banking division at Macquarie where he engaged in domestic andinternational M&A transactions. Shinya’s also spent time with the CITIC Capitalprivate equity team and the Jefferies’ investment banking division with anemphasis in international transactions. Shinya graduated from the Faculty ofLaw at Keio University.

Global Bases