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 History

Company Profile


Karahashi Building 6F, 2-17-15 Takadanobaba, Shinjuku-ku, Tokyo

Registered Head Office/Dental Laboratory

5th floor, Takahashi Building, 3-26-8 Hatchobori, Chuo-ku, Tokyo

Dental Laboratory

3-28, Nishidai 4-chome, 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


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

Leadership Team


Chief Executive Officer

Naozum 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.  


Chief Operating Officer

He joined SheepMedical, in its early days, as a business manager to expand the business’ digital manufacturing and business development.  

Previously, he worked in the technology industry as a skilled developer and producer of entertainment businesses. His strategic guidance has been implemented in technology start-ups in Japan and abroad.  

Yasufumi graduated from the University of Tokyo Graduate School of Frontier Sciences.  


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.  


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.  


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.


Chief Administrative Officer

Tomoyo Umemoto is the chief administrative officer of SheepMedical, leading the administration division.   She has been involved in building SheepMedical’s business operations and system infrastructure since its start. She’s leveraged her administrative skills as the executive assistant to the management team and president of beBit Corporation.

Previously, she was a part of the human resources department at Works Applications.   Tomoyo graduated from the Faculty of Human Sciences at Osaka University.  


Chief Technical Officer

Masaki Toyoshima is the chief technical officer for SheepMedical, where he leads the digital advancement of the orthodontic experience.  

He previously spent time launching and growing businesses in ad-tech and HR SaaS with Kyocera Communication Systems Corporation and Fringe81 Corporation. As the technology lead and manager, he oversaw technology strategy, hiring, and organizational development.


Chief Marketing Officer

In 2021, after the merger with SheepMedical, he became CMO and head of the Consumer Products Group, and promoting the launch of new businesses.

After working as a marketing professional at a technology company as a new graduate, he started his own business. He also participated in several startups in their initial stages.After that, as a new business manager at DeNA, he launched multiple businesses, acquisition of startups, and developed mid- to long-term strategies. Graduated from Chuo University, Faculty of Letters.


Global Bases