We Are All Professionals

Our team’s broad experience and background allows us to provide comprehensive support for our portfolio companies

Team Member

  1. Yasuhiko Yurimoto

    Yasuhiko Yurimoto

    Founder / CEO / General Partner

    Yasuhiko founded Global Brain after holding senior positions in Citibank N.A. and Fuji Bank (Mizuho Bank).
    Leveraging his experience as a founder and overcoming financial crisis in 2000 and 2008, he is a mentor to many entrepreneurs.

  2. Isao Yasuda

    Isao Yasuda

    Fund Management Group

    General Partner

    Isao joined GB as an expert in IPO. At Japan Securities Dealers Association, he was responsible for listing examinations, introducing book building system and other initiatives.

  3. Jiro Kumakura

    Jiro Kumakura

    Investment Group

    General Partner

    Jiro is a partner in charge of technologies. He was an early member of Digital Design, an enterprise middleware provider which made an IPO at NASDAQ Japan as its very first listing.

  4. Keisuke Tatsuoka

    Keisuke Tatsuoka

    Investment Group

    General Partner

    Keisuke built his career in consulting and new business development at Recruit and Boston Consulting Group for clients in the telecom, CPG, and financial institutions.

  1. Kazuhiko Miyama

    Kazuhiko Miyama

    Investment Group


    Kazuhiko is a strategist with experience in corporate planning and new business development, having lead and managed various services at Recruit and TSUTAYA Online.

  2. Ayu Shinoyama

    Ayu Shinoyama

    Corporate Management Group

    Partner / Chief Financial Officer

    Ayu is an expert in tax accounting. Prior to joining GB, she managed the back office for a tax accounting firm supporting client auditing,incorporating and many other functions.

  3. Tasuke Nakagawa

    Tasuke Nakagawa

    Business Development Group

    Partner / M&A

    Tasuke brings financial expertise from his work at Ernst & Young ShinNihon LLC. Experienced in auditing, financial due diligence and IPO preparation.

  4. Hiroshi Shimazu

    Hiroshi Shimazu

    Corporate Management Group

    Partner / General Counsel

    Hiroshi manages legal and due diligence across the GB's global operation and also helps portfolio companies with the strategic legal and IP issues. Prior to joining GB, he served as APAC Regional Counsel at a U.S. company and the head of U.S. Legal at a Japanese company.

  5. Noriko Usui

    Noriko Usui

    Fund Management Group

    Partner / Chief Fund Officer

    Noriko is responsible for the fund management and administration. She also advises the portfolio company in HR, general affairs, and accounting matters. She has experience in managing the back office both in a public company and a venture company.

  6. Naoki Kamimaeda

    Naoki Kamimaeda

    Investment Group

    Partner / AI & Cyber Security Europe Office Representative

    Naoki is responsible for AI, Big Data and Cloud Tech areas. Prior to joining GB, he worked for Sony as a software engineer specialised in AI and Big Data technologies. For the last 2 years in his Sony career, he worked in San Francisco as a software engineering manager of PlayStation Network.

  7. Hirokazu Watanabe

    Hirokazu Watanabe

    Investment Group


    Hirokazu has various experiences about venture-investment, M&A, JV and new business development. He has lead many deals in NTTDoCoMo, LINE and venture-capital for a long time.

  1. Asuka Watanabe

    Asuka Watanabe

    Business Development Group


    Prior to joining GB, Asuka worked at law firm in Tokyo and at Japan’s first bicycle sharing startup, where she provided legal support and led all business development efforts. At GB, Asuka is charge of providing legal and financial support to GB’s portfolio companies.

  2. 勝俣 恵美

    Emi Katsumata

    Corporate Management Group


    Emi is responsible for GB’s reception and general administration. Prior to joining GB, Emi worked for a trading company and engaged in administrative work. She was in charge of general affairs and general reception work at a major tax accountant corporation.

  3. Harue Hayashi

    Harue Hayashi

    Fund Management Group

    Partner in charge of Fund Management

    Harue is responsible for the fund management and administration.
    She also advises the portfolio company in HR, general affairs, and accounting matters.
    She worked for a life assurance company and a tax accounting firm.

  4. Hidetaka Aoki

    Hidetaka Aoki

    Investment Group

    Partner in charge of Space & Robotics

    Hidetaka is responsible for aerospace and new technology sector. He joined GB from Dream Incubator where he was an evangelist for the aerospace business, developed strategies and consulted for the clients. Prior to DI, he developed “Kounotori”, Japan’s first automated cargo spacecraft at Mitsubishi Electric and won a number of awards.

  5. Hiroyoshi Iwata

    Hiroyoshi Iwata

    Investment Group


    Prior to joining GB, Hiroyoshi worked for a Japanese plant engineering and construction company. Previously Hiroyoshi was a chemical engineer in charge of R&D and business development in Environmental and Energy sector, and planned collaborations with universities and companies at sales headquarters.

  6. Hisashi Suzuki

    Hisashi Suzuki

    Investment Group

    Singapore Office Representative

    Hisashi is responsible for operations in the APAC (Southeast Asia, India, and Oceania) region. Prior to joining GB, Hisashi was responsible for producing some of Japan’s major hit contents such as Final Fantasy and EXILE. He was a founder of Square (formerly Square Enix), LDH and served as a senior executive at Rakuten.

  7. Jooil Hong

    Jooil Hong

    Investment Group

    Partner in charge of Korea

    Hong is Venture Partner and is responsible for the investment in Korea. Prior to joining GB, Hong was a Head of Growth Strategy Part at Daum Kakao. He also served as an Entrepreneur and CSO of a Startup. He also built his career at Skylake Investment and focused IT Sector Investment.

  8. Junji Okamoto

    Junji Okamoto

    Investment Group


    Prior to GB, Junji spent several years at an investment bank where he was involved in M&A advisory and real estate business. He's also worked for a VC and RECRUIT where he was involved in startup investment in China, US and South East Asia.

  9. Jungyong Kim

    Jungyong Kim

    Investment Group

    Principal / Korea Office

    Kim launched his own startup in Korea, and expanded its business into Japan and China last 6years. He has broad experiences of business developments globally, and speak both Korean and Japanese fluently.
    He is in charge of investments in Korean startups from KDDI Open Innovation Fund.

  10. Kaori Akiba

    Kaori Akiba

    Corporate Management Group

    Senior Associate

    Kaori administers our office and supports our portfolio companies in accounting. Previously she managed promotions and events at an association which provides course and certification program.

  11. Kazunori Yamaguchi

    Kazunori Yamaguchi

    Investment Group

    Partner in charge of Enterprise Communication

    Kazunori has developed his career in Strategic Consulting industry before joining GB. At the Boston Consulting Group, he worked with various clients, such as Financial Institution, Trading Company, and Manufacturers. He has also worked in a Japanese professional baseball team as a member of Business Planning Team.

  12. Keiji Niizu

    Keiji Niizu

    Investment Group

    Partner in charge of Enterprise Software & Services

    Prior to joining GB, Keiji worked at Microsoft, Mobile Internet Capital (MIC), and JICT (government fund). At Microsoft, Keiji was an engineer for server software and cloud services. At MIC, Keiji invested in startups in Japan, US, and Israel. At JICT, Keiji co-invested with Japanese companies in oversea IT projects including M&A.

  13. Keiko Yoshida

    Keiko Yoshida

    Fund Management Group

    Senior Associate

    Keiko is an accounting expert. Prior to joining GB, she worked for an accounting firm where she advised her clients on monthly financial closing and analysis. At Daiwa Securities Group, she was advising individuals and businesses on asset management.

  14. Keita Washizu

    Keita Washizu

    Investment Group


    Keita built his career in strategy consulting at Roland Berger and Arthur D Little, where he supported new business development, open innovation and M&A for clients mainly in manufacturing and investment firms. He started his career as an engineer at Schlumberger.

  15. Kenta Kitsuka

    Kenta Kitsuka

    Investment Group

    Partner in charge of Functional Materials

    Kenta built his career in Sanyo Electric, and L'Oreal as a researcher. He has a Ph.D in the material science and physical chemistry, and brings expertise in consumer products.

  16. Kia Ishii

    Kia Ishii

    Business Development Group

    Principal / Tech Talent

    Kia is an expert in Web design/development. He is also an open source software developer authoring the web framework plugins and manages the open source community. He worked for an enterprize system integration company and a tech venture.

  17. Koichiro Suzuki

    Koichiro Suzuki

    Business Development Group

    Principal / Tech Talent

    Koichiro is a specialist in system software development, IT infrastructure design/management, IoT, and VR. He brings a broad range of technical skills from his work at tech venture responsible for product customer support.

  18. Komugi Matsui

    Komugi Matsui

    Corporate Management Group

    Principal / PR Talent

    Komugi is responsible for PR/Marketing for GB and startup companies. Built her career start at Sony Marketing and global mobile companies and experienced in PR and cohesive marketing.

  19. Kotona Inaida

    Kotona Inaida

    Fund Management Group


    Kotona is responsible for the fund management and administration. Prior to joining GB, she worked at a public-listed company, and has experience in the accounting affairs of digital marketing and EC depertments.

  20. Kyoko Minagawa

    Kyoko Minagawa

    Business Development Group

    Principal / Design Talent

    Before joining GB, Kyoko worked for Livedoor and Yahoo! JAPAN as a web designer. At Yahoo! JAPAN, she was responsible for designing Yahoo! BB, Yahoo! Auction and Yahoo! Partner. She is responsible for conducting the user surveys and further analyzing the effectiveness of such studies through the information/branding designs.

  21. KyungHun Lee

    KyungHun Lee

    Investment Group


    Prior to joining GB, Lee worked for a global startup as CSO and managed the AI robot business development. He started his career as a consultant at Nomura Research Institute and then moved to Boston Consulting Group.

  22. Mana Takabayashi

    Mana Takabayashi

    Investment Group


    Before joining GB, Mana worked for a consulting firm and Japan International Cooperation Agency (JICA). While at the consulting firm, she was in charge of BPR projects for the Japanese manufacturing industry. At JICA, she supported overseas business development for Japanese SMEs within different industries, which are developing their business in Asia, Africa, and Latin America, etc.

  23. Masaya Kawakami

    Masaya Kawakami

    Investment Group


    Prior to joining GB, Masaya worked for Rakuten and ofo. At Rakuten he held positions in UX design and product management of many services. At ofo, Masaya led business strategy and KPI visualization for APAC countries.

  24. Mitsuaki Nishino

    Mitsuaki Nishino

    Corporate Management Group

    Legal Counsel

    Prior to joining GB, Mitsuaki worked for a legal office in Tokyo as an associate attorney and a Japanese game company as the legal manager. At the game company, he provided legal services in the fields of the game, entertainment, VR and corporate.

  25. Mizue Kinoshita

    Mizue Kinoshita

    Corporate Management Group


    Prior to joining GB, Mizue worked for an advertising and publishing company as an accounting. She is responsible for improving efficiency of accounting tasks for GB’s portfolio companies and GB group.

  26. Nagisa Shigetomi

    Nagisa Shigetomi

    Investment Group


    Before joining GB, Nagisa worked for JR Kyushu and Eirene University. At Eirene University, she was involved with management as co-founder, placing importance on social impact. She translated the Business Model Canvas booklet into Japanese and released it as Creative Commons. She has experience in supporting to create a new business using Design Thinking.

  27. Sachiko Sakamoto

    Sachiko Sakamoto

    Investment Group


    Before joining GB, she built her career in marketing and business development for the telecommunication & content services at NTT DOCOMO and Rakuten, where contributing to the growth of Rakuten Mobile as Head of Service Strategy Dept.

  28. Sayaka Yoshino

    Sayaka Yoshino

    Corporate Management Group


    Sayaka is responsible for GB’s general administration and accounting. Prior to joining GB, Sayaka was a receptionist at an esthetic salon.

  29. Sho Ikeda

    Sho Ikeda

    Investment Group


    Sho built his career in corporate finance and consulting at Mizuho Bank and Deloitte Tohmatsu Consulting. He supported his client’s new business development and current operation improvement from the viewpoint of finance/strategy in Japan and South East Asia (Indonesia).

  30. Shohei Hayashi

    Shohei Hayashi

    Investment Group

    Partner in charge of Enterprise Communication

    Before joining GB, Shohei worked for Japan International Cooperation Agency and Deloitte Consulting, where he gained experiences in emerging market investment and M&A consulting. He started his career as a trader at JPMorgan.

  31. Shohei Ichimiya

    Shohei Ichimiya

    Investment Group

    Principal / US Office

    Prior to joining GB, Shohei worked for Sony Corporation where he held positions in engineering and corporate development. As an engineer, Shohei managed production systems for the PlayStation Network. As part of the corporate development team, he executed tech related M&A and startup investments.

  32. Shohei Takaoka

    Shohei Takaoka

    Business Development Group


    Shohei was a founding member of several tech startups. He was managing BizDev, back office, and financing. At GB, Shohei is responsible for BizDev support, such as connecting startups with enterprize companies to make alliances.

  33. Takahito Mizuno

    Takahiro Mizuno

    Corporate Management Group

    Partner in charge of Legal & Compliance

    Takahiro manages legal and due diligence across the GB's global operation and also helps portfolio companies with the strategic legal and IP issues. Prior to joining GB, he served as an in-house lawyer at Sumitomo Mitsui Banking Corporation and an associate at a legal office.

  34. Takashi Kato

    Takashi Kato

    Investment Group

    Partner in charge of USA
    US Office Representative

    Takashi joined GB as an expert in B2C online sales/marketing and promotions. He built his career in Amazon, Microsoft and TripAdvisor, and currently works with portfolio companies on advertising/promotion strategies.

  35. Takashi Sano

    Takashi Sano

    Investment Group

    Partner in charge of Blockchain

    Takashi is an APAC regional manager. Prior to joining GB, Takashi spent his career in establishing joint ventures and new projects, as well as managing energy business in APAC and Middle East / Africa region at Sony Electronics Asia Pacific based in Singapore.

  36. Tatsuya Matsumoto

    Tatsuya Matsumoto

    Investment Group

    Singapore Office

    Prior to joining GB, Tatsuya worked for UBS, INCJ (Innovation Network Corporation of Japan) and NRI (Nomura Research Institute Singapore). At NRI, he provided consulting services for new business development in ASEAN. At INCJ, he focused on technology sector and was involved with investment in JOLED. At UBS, he engaged in M&A advisory and financing transactions.

  37. Tomoaki Ishikure

    Tomoaki Ishikure

    Investment Group

    Partner in charge of Startup Acceleration

    Tomoaki built his career in new business development and corporate development including venture investment and M&A at Recruit Holdings.

  38. Tomoko Minagawa

    Tomoko Minagawa

    Investment Group


    Prior to joining GB, Tomoko built her career at IBM Japan, a management consulting firm, and a Tokyo-based AI startup. Through various consulting projects, she supported enterprise companies in cross border business development, open-innovation strategy and business alliance implementation. In the AI-startup, she was responsible for AI-based business development through partnerships with leading enterprises.

  39. Yoko Toiyama

    Yoko Toiyama

    Fund Management Group

    Partner in charge of Investor Relations

    Yoko is partner in charge of Investor Relations to Limited Partners. Prior to joining GB, she served as investor relations for buy-out, secondaries, venture capital fund at Ant Capital Partners. She also participated in the establishment of Sony Bank at Sony.

  40. Yoshinari Ito

    Yoshinari Ito

    Investment Group

    Partner in charge of Strategic Partnerships

    Prior to joining GB, Yoshinari worked for a security finance company and a startup company.At a startup company, he was responsible for consolidated annual budget planning, equity financing, IPO preparation, IR strategy, new business development, M&A, and startup investment.

  41. Yusuke Suzuki

    Yusuke Suzuki

    Investment Group


    Prior to joining GB, Yusuke worked for the Ministry of Foreign Affairs and McKinsey & Company. He started his career as a French-speaking diplomat with 4 years’ experience in France, and managed relations with Africa and South Asia. At McKinsey, he led large-scale transformation programs and strategy, sales or procurement projects, both in BtoB and BtoC.

  1. Atsushi Matsuda

    Atsushi Matsuda

    Business Development Group

    Venture Partner

    Prior to joining GB, Atsushi worked at ADWAYS Ventures and at Japanese AI startup as CFO. He has various knowledge about venture-investment, M&A, IPO processes and business alliances.