Management team

Representative Director and CEO (Chief Executive Officer)

Nobuyoshi Yamasaki

Career

After starting his own business at the age of 20, he founded TBM in 2011. He received the "Great East Japan Earthquake Reconstruction Award" at the Japan Venture Awards 2016. (Plug and Play)
Winner of the 2016 "Social Impact Award," which recognizes entrepreneurs who challenge new business areas and drive innovation.
The Year 2019Japan, Exceptional
Awarded the "Grand Prize" in the Growth category. Associate Partner of the World Economic Forum (Davos Conference) Unicorn Community, and a member of the Japan Business Federation (Keidanren). Appeared on the Nikkei Special "Cambrian Palace" 10th Anniversary 500th Episode Special Program.

Managing Executive Officer, CSO and Head of the CSO Office

Taichi Yamaguchi

Career

After working at Fuji Xerox Co., Ltd. and PricewaterhouseCoopers Co., Ltd., he joined TBM Co., Ltd. in 2015. In 2018, he was appointed Executive Officer and CSO (Chief Corporate Strategy Officer). He is involved in company-wide business strategy, fundraising, capital and business alliances with major companies, overseas business development, and the launch of new businesses such as the CircleX business and digital solutions. From 2022, he will oversee sales at the Material Innovation Business Headquarters. In 2023, he will be appointed Executive Officer and CSO.

Senior Managing Executive Officer, CMO
Head of Communications Division

Takayuki Sasaki

Senior Executive Officer and CFO
Corporate Finance Division

Seigo Nakashima

Career

From 1999, I worked in corporate sales at Dai-Ichi Kangyo Bank, Ltd. (now Mizuho Bank, Ltd.), from 2006 at Daiwa Securities SMBC Co., Ltd. (now Daiwa Securities Co., Ltd.), and from 2014 at SMBC Nikko Securities Inc., among others.
In addition to handling finance and M&A for listed companies, he has long been involved in supporting startups. In particular, as a lead underwriter for a securities company, he has achieved numerous successes in the field of supporting initial public offerings (IPOs), and has received awards such as the President's Award at the securities company.
Joined TBM Co., Ltd. in 2022 and assumed the position of Executive Officer and Head of the Capital & Business Alliance Office.

Executive Officer CSuO
Head of Sustainability Division
Head of Digital Solutions Department
Deputy Head of Corporate Planning Office

Tokuro Hatori

Career

Since my time at Keio University, I have been interested in the intersection of the natural environment and people's lives, and I have studied environmental law and development law.
At the University of Queensland (Australia), where I studied abroad, I majored in Environmental Management.
After graduation, I worked in sustainability consulting at PwC Japan.
We support clients across a wide range of industries in developing sustainability promotion systems, primarily in the areas of ESG investing and sustainable supply chains.
In 2018, she joined TBM as its first dedicated sustainability specialist. Her work includes setting targets for 2030, conducting product life cycle assessments, transitioning to renewable energy, and disclosing information to ESG rating agencies such as CDP.
He was appointed Head of the Sustainability Department in 2022 and Executive Officer and CSuO in 2023.

Executive Officer CKO
President's Office Director
Administrative Headquarters Deputy General Manager

Tomoya Nakamura

Career

After joining Accenture Japan Ltd.'s Strategy Group in 2008, I gained experience in a wide range of projects for manufacturing clients, including mid-term planning, new market entry strategy development, sales reform, and digital transformation.
In 2017, I joined TBM Co., Ltd., where I was involved in overseas expansion and application development. In 2018, I was involved in the group formation of Bioworks Co., Ltd. and was appointed to the board of directors.
In 2021, he became involved in a capital and business alliance with the SK Group and was appointed to the board of directors of SK TBMGEOSTONE, a joint venture with the SK Group.

Executive Officer
General Manager of Technology Development Division
Intellectual Property Department Manager
Deputy General Manager of Production Division

Hironari Sakai

Career

I engaged in research activities on inorganic/organic composite materials during graduate school, and joined Mitsubishi Research Institute after graduation.
As a consultant, I was involved in formulating marketing strategies for telecommunications carriers and supporting the planning and execution of new businesses centered on clients' intellectual property.
Joined TBM in 2016. He spearheaded the construction of the Tagajo Plant as project manager, and contributed to the establishment of production management systems, including production planning processes, and quality assurance systems at the company's own factories.
Since 2022, as the head of the Management Planning Department, he has been promoting the establishment of business management systems, the optimization of manufacturing processes, and intellectual property strategies. He was appointed as an executive officer in 2023.

Executive Officer
General Manager, Production Division
Tohoku LIMEX Factory Factory Manager
Yokosuka circular factory Manager

Shinya Naganogawa

Career

Originally from Heilongjiang Province, China, she has lived in Miyagi Prefecture since she was 15 years old. After working for a metal processing manufacturer, she joined TBM in 2014 with the desire to "leave a rich natural environment for children."
As a founding member of the Shiroishi Plant, our first factory in Japan, I was involved in everything from preparing the overgrown factory grounds to installing equipment and conducting test production—literally starting from scratch.
He is the person who knows better than anyone the arduous journey to achieving stable production today. He became the plant manager of Shiroishi Plant in 2022 and an executive officer in 2023. His motto is "Maintaining the status quo is the greatest risk."

Executive Officer
Management Headquarters General Manager
Corporate Department Manager
Head of People & Culture
Manager of Corporate Planning Office
Accounting and Finance Department Manager

Juwa Ito

Career

Joined Hikari Tsushin in 1997 and worked in the accounting department, where he was involved in fund management, investment management, individual settlement of accounts, etc. At Hitachi, Capcom, and Tetsujinka Keikaku, he was in charge of corporate management such as general finance and accounting, business planning, group company management, and head of the president's office. As a director at a company preparing for listing, he was involved in fundraising and IPO preparations, and joined TBM in 2021. He is promoting the streamlining of corporate management operations and the establishment of systems for legal, labor, general affairs, information systems, etc.

Executive Officer
Manager, Material Solutions Sales Department
New Market Development Office

Ryo Masuda

Career

In 2017, while still a university student, he joined TBM. As the first recruitment manager, he spearheaded the establishment of the HR department and the construction of the recruitment infrastructure. After transferring to the Materials Innovation Business Division in 2020, he engaged in new business development for major corporations and achieved top sales for two consecutive years. In 2023, he established the Account Sales Team and led the development of new applications and products. After becoming the head of Enterprise Sales in 2024, he led the development of new businesses such as AI promotion as the head of the New Market Development Office in 2025. In 2026, he was appointed as an executive officer.

Executive Officer
Deputy General Manager of Corporate Finance Division
Corporate Finance Department Manager

Momo Nakatani

Career

After joining Merrill Lynch Japan Securities Co., Ltd. as a new graduate in April 2001, he engaged in sales activities mainly for listed business corporations in the business corporation department. In February 2008, he joined Lehman Brothers Securities Co., Ltd. and participated as a member of the formation of a sales team for listed business corporations. In January 2009, joined RECOF Co., Ltd. and engaged in proposal activities related to M&A for business corporations in the coverage group. Joined UBS Securities Co., Ltd. in July 2010 and engaged in proposal activities centered on fund procurement for listed business corporations at the investment banking headquarters. In November 2012, he joined the Corporate Coverage Group of the Wealth Management Headquarters of UBS Securities Co., Ltd., and in February 2014, he joined the Investment Banking Services Department of the same Headquarters for M&A, fundraising, and alternative investments (real estate, private equity, hedge funds, etc.). , Engaged in product and solution development related to business matching. Joined TBM Co., Ltd., Ltd. in February 2017.