Management team



Akatsuki Fuchigami

Chief Executive Officer, Representative Director, Founder

After studying at the University of Texas, and after working at an overseas sales company as management at Seiko Instruments Inc., Akatsuki experienced finance sales under the ORIX Overseas Act, while also establishing the Tax Strategy Division at Lovendar Masai Co., Ltd., as a European taxation strategy consultant. While working in Japan, Akatsuki developed a new tax consulting solution in Japan, earning himself over 100 clients.

In 2010, Akatsuki and some of his colleagues established OPTI Inc. on November 11. Consulting companies on the value added tax of Europe and tax article writing etc. at the Ministry of Economy, Trade and Industry, the Japan External Trade Organization (JETRO) etc. Today, in the Tax Division / Data Division, we provide services to more than 400 clients mainly in major manufacturing industries.

In 2012, OPTI acquired domestic first order surrogate rights of company database "OneSource" developed by Avention in the United States. We established One Source Japan Co., Ltd. as a group company on January 10, 2013, and assumed office as Representative Director of the company. One Source Japan Co., Ltd. developed a service in Japan together with Nikkei Media Marketing Co., Ltd., a distributor, and has now established it as a service used in many companies such as the consulting industry and financial institutions.

Since January 2016, we have served as the Japan Country Manager of Taxback International, Inc., the world's largest VAT refunder, and we are currently developing a service concerning Taxback in Japan.

・Coverage Report: Diamond Co Ltd., TV Tokyo, World Business Satellite etc.
・Seminar Achievements: Many international tax conference seminars held at the French Embassy and Kansai Economic Federation, Roppongi Academy Hills, Embassy, Industry Organization, Hitotsubashi University etc, industrial parks in various parts of Asia

Writing record:  JETRO, Mt. Fuji magazine service

・Reference URL: Onesource Japan





Takuma Yamazaki

Co-founder, Representative Director, Chief Operating Officer, Chief Financial Officer

Joined ORIX Corporation in 1995, engaged in business development and investment in overseas business units. In 2006, transferred to Singapore investment subsidiary ORIX Investment and Management Pte Ltd as Managing Director(CEO). After that, transferred back to Tokyo(HQs) and worked as Managing Director in departments including Global Business Investment, Strategic Investment, and Global Business Development.

Carried out many projects as a leader together with team members including;                                                                -Investment in Vietnam and Singapore under joint venture with listed enterprises in Singapore;                                       -Business development of micro-finance as director of listed enterprise in Sri Lanka;                                                                                                     -Minority equity investment in Cambodia's largest commercial bank; and                                                                                                                         -M&A of Indonesia's second largest independent multi-finance company.

After the investments were implemented, promoted with team members and carried out unique hands-on;                                                                      -Development of new business in Vietnam, Cambodia and Myanmar with invested enterprises;                                                                                        -PMI (Post Merger Integration) for an investee in Indonesia; and                                                                                                                                    -Investment strategy planning in Thailand and Malaysia.

Having experience of cross-border investment among industrial companies and PMIs, started to be willing to support overseas business development of Japanese companies with a hands-on way. Also sympathised with Fuchigami, who had worked together in ORIX, and his idea “making world’s tax matters easy by the cloud.” Confident in the growth potential of OPTI as TaxTech and AdvisoryTech, and joined its management by co-funding.
Graduated from Kwansei Gakuin University.





Willim Schutte


After obtaining the VAT inspector qualification from the Ministry of Finance of the Netherlands, he was in charge of the VAT problem for over 20 years at the major four accounting firms. After working as a partner at the four major accounting firms, I worked at Robben Dalma Sai. After that, I spun out with Mr. Uchi and devoted my efforts to establish OPTI Inc. He has extensive experience in consulting, such as supply chain optimization and introduction of ERP making full use of his knowledge of European VAT. We offer tax consulting at the global expert organization Gerson Lehrman Group. He serves as OPTI B.V. CEO and director of OPTI Inc.




Masaru Aoki

Partner, Chief Information Officer

After studying at the Keio University, Masaru starts working at Mixi, Inc., the leading company of online social network in Japan. He experienced data analytics in management team, and developed new online services for 20 million users. In 2012, he joined Gree, Inc., the mobile app company in Japan. He developed online community app with engineers in new media business team. In 2014, joined OPTI Inc. and OneSource Japan.



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