New Comer
of the Year
Selected as the sole worldwide recipient of Vertex’s New Comer of the Year 2025 award.
Explore tax technology support
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Company
Built to orchestrate complex cross-border work.
OPTI is a Tokyo-based market-entry, program-management and digital-operations company with deep experience in international indirect-tax operations.
OPTI / FIELD NOTE
Japan expertise / Global collaboration
A collaborating firm of Andersen Global.
OPTI connects Japan-based execution with worldwide tax registration, tax filing and litigation support through Andersen Global’s independent member and collaborating firms. Local tax professionals and legal counsel carry out the relevant professional work.
Andersen Global’s founding U.S. member, Andersen Tax LLC, is part of Andersen Group Inc. (NYSE: ANDG).
OPTI is an independent collaborating firm. Andersen Global is an association of legally separate firms; specialist engagements are coordinated according to each client’s needs.
Recognition / Technology / NetworksSpecialist knowledge.
Specialist knowledge.
Practical capability.
Tax technology and international networks support our work across digital systems and physical operations.
New Comer
Certified
Implementation Partner
Japan’s only Avalara Certified Implementation Partner, combining tax knowledge with implementation and integration support.
Read about our Avalara credentialsConnected to the
e-invoicing community.
OPTI is a member of the Global Exchange Network Association (GENA), bringing international e-invoicing knowledge into technology planning and implementation.
About GENAFrom digital compliance to products ready for market.
We connect tax engines and e-invoicing with logistics, licensed customs brokers and product-readiness partners. For apparel brands, this includes coordinating Japanese care-label information, production and attachment.
FOUNDER / REPRESENTATIVE DIRECTOR & CEOMeet the founderAkatsuki (Aki)
Akatsuki (Aki)
Fuchigami
淵上 暁
Connecting international tax, technology and commercial execution.
Aki founded OPTI in November 2010 with colleague Willem Schutte. His earlier career spanned European sales-subsidiary management in the semiconductor industry, financial-product structuring and sales overseas, and establishing the tax strategy division at Lowendal Masai, now Ayming.
He has provided European VAT consulting and authored tax articles for organizations including Japan’s Ministry of Economy, Trade and Industry (METI) and the Japan External Trade Organization (JETRO). His work also spans tax technology, e-invoicing and cross-border business development.
- 2010
- Co-founded OPTI Inc.
- 2013
- Established OneSource Japan, following the acquisition of Japanese distribution rights for the database now known as D&B Hoovers.
- 2016
- Appointed Japan Country Manager of Taxback International.
DIRECTOR / CHIEF DIGITAL OFFICERDigital leadership
Masaru Aoki
青木 優
Product development, digital marketing and data analysis.
Masaru is a Director and Chief Digital Officer of OPTI. He completed a master’s program at Keio University’s Graduate School of Media and Governance before joining mixi, where he worked on big-data analysis and product planning and development.
He later joined GREE’s media business division, working on new business development, social-media products and iOS applications. He brings this experience in digital products and data to OPTI’s technology capabilities.
PIVOT / YouTube / ConversationsIdeas from
Ideas from
the work itself.
Conversations with Aki Fuchigami on international commerce, indirect tax and the technology connecting them. Videos are in Japanese.
OPTI × Shopify × PIVOTTax technology for
Tax technology for
global commerce.
Aki joins Shopify Japan’s Ena Kumazawa and PIVOT’s Norihiko Sasaki to discuss international e-commerce, indirect-tax complexity and the role of tax technology.
Cross-border commerce:
VAT and indirect tax.
A conversation with Yuki Tokuda about how products, sales channels and target markets shape tax preparation.
Shopify, Amazon and eBay:
preparing to sell overseas.
Marketplaces, registration and the practical work behind an international e-commerce launch.
Recorded discussions reflect the context at the time of recording. For a current project, discuss the applicable requirements with your advisers.
OPTI / Your Japan operating partnerLocal coordination.
Local coordination.
A cross-border perspective.
OPTI supports overseas companies entering and operating in Japan as a local project-management partner and integrator. We connect headquarters, qualified professionals, local providers and the systems behind the work.
01 / Lead the program
A local PMO.
Roadmaps, responsibilities, milestones, decisions and bilingual coordination.
See how OPTI works02 / Connect the workSpecialists & operators.
Tax and legal professionals, customs brokers, logistics providers and other local partners, selected for the engagement.
Explore our services03 / Build visibilityPractical systems.
Dedicated databases, document workflows, approvals and management reporting that support daily operations.
Explore data & systemsOPTI manages the program and its dependencies. We are not a tax-accounting practice, law firm or licensed customs broker. We work with our professional network to assess applicable laws and coordinate qualified tax professionals, legal advisers and licensed customs brokers, who perform the relevant professional work. You gain a local team connecting the specialists, documents and decisions. Representative-office and director support are assessed case by case.
Our mission
Digitalize for People.
Complex international operations should not depend on avoidable manual work or knowledge trapped between organisations.
We turn obligations and operating realities into systems people can understand, run and improve. The goal is not technology for its own sake. It is clearer work, stronger control and more capacity for growth.
The company
International indirect tax was the starting point.
OPTI Inc. founded in Tokyo
Established with a focus on international indirect-tax operations.
From compliance to transformation
Tax engines, data operations and digital workflows became part of the work.
Tax, trade, logistics and technology
Connected as one operating capability for cross-border business.
Company facts
OPTI Inc.
- Representative Director
- Aki Fuchigami
- Director & Chief Digital Officer
- Masaru Aoki
- Established
- 11 November 2010
- European presence
- OPTI B.V., Purmerend, the Netherlands
- Global collaboration
- A collaborating firm of Andersen Global since 2024
- Core work
- Market-entry programs, cross-border operations, specialist coordination, indirect-tax compliance management and technology implementation
A coordinated network
Local execution. Cross-border perspective.
OPTI coordinates with tax professionals, customs brokers, warehouse operators, technology providers and other specialists according to the work required.
Visit the corporate siteTokyo / OtemachiAt the heart of
At the heart of
Japanese business.
A prime business location in central Tokyo, close to Tokyo Station, Otemachi and the Imperial Palace. A connected base for your meetings, partners and next steps in Japan.
4F Ogawa Bldg, 1-2-2 Uchikanda, Chiyoda, Tokyo, 101-0047, JapanClose to the places that matter
- Tokyo Station
- 10 min
- Otemachi Station
- 3 min
- Imperial Palace area
- 3 min
Approximate access times supplied by OPTI. Times vary by station exit, route and mode of travel.
Your next move
Bring us the situation, not a perfect brief.
Tell us what you want to move, sell or build in Japan. We will help identify the workstreams, dependencies and first practical step.
Discuss your Japan expansion