Corporate Accounting & AdvisoryAccounting and tax support for
foreign-owned companies in Japan.

We support closing, tax compliance, reporting to overseas headquarters and finance process improvement, including RPA and generative AI. You work directly with a Japanese CPA and licensed tax accountant with more than twenty years in audit and in-house finance.

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Track recordSelected engagements

  • Christian Dior G.K.2022–2023Company-side handling of the first-year audit after a change of auditor; size-based enterprise tax analysis
  • Breitling Japan2023–2024Accounting and finance support during an SAP S/4HANA implementation
  • Tiffany & Co. Japan2024Fixed asset accounting for new store openings
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Services

From foreign-owned enterprises to small businesses, sole proprietors and individuals.
Whatever the size of your organisation, you are welcome to get in touch — we will propose a scope of support that fits.

Accounting & Tax Advisory

Outsourced accounting, monthly and annual closing and tax returns, handled by a principal with over 20 years in audit, accounting and tax. Companies of any size are welcome to get in touch.

Luxury Finance & Accounting

Strategy, accounting and finance advice grounded in how brand businesses actually operate, from a CPA who has worked inside the world's largest luxury groups and published on LVMH, Richemont, Kering and Hermès.

International Tax & Foreign-Owned Companies

A CPA with an Oxford Executive MBA and experience as head of finance at foreign-owned companies supports English-language accounting, international tax and head-office reporting.

Finance Automation & AI Advisory

Which processes to automate, and which decisions to keep with people. Process inventory, suitability, ROI and internal control, assessed from a finance and controls perspective.

Why Choose Us

Reason 1 In-house finance experience

Head of accounting at the Japanese subsidiary of the world’s largest luxury group and head of finance at Zegna Japan — advice grounded in how operating companies actually run.

Reason 2 Direct communication with your overseas head office

Fully bilingual, with an Executive MBA from Oxford. IFRS and head-office reporting handled in English, with no interpreter in between.

Reason 3 Every engagement handled by the principal

From first conversation to delivery, you work with the principal. Advice is shaped by in-house experience, so it can actually be implemented.

Message

I am Hiroaki Tamura, principal of Tamura Accounting Firm.

Our strengths are English-language support, IFRS, and the practical use of RPA (UiPath) and generative AI. We do not stop at telling you what the answer should be — we stay with the work until the issue is resolved.

Accounting and tax information is easy to come by today, generative AI included. In practice, though, there are areas AI alone cannot cover: framing the premises correctly, understanding what actually happened in a transaction, assessing risk, and managing internal and external stakeholders. We step into exactly that territory, while using AI and RPA where they genuinely excel, and propose solutions you can act on.

If you have a question about finance, accounting, tax or audit, please feel free to get in touch.

CPA registration no. 23565 (JICPA)

Hiroaki Tamura — CPA (Japan), Licensed Tax Accountant, MBA (Oxford)