Bookkeeping for Foreign Companies in Japan: Your Essential FAQ

What Is the Difference Between Bookkeeping and Accounting?

Bookkeeping is the systematic recording of daily financial transactions (invoices, payments, receipts); accounting is the process of analyzing, summarizing, and reporting those records to produce financial statements, tax filings, and compliance documents. Bookkeeping feeds data into accounting: a bookkeeper logs every expense and income entry as it happens, while an accountant transforms that recorded data into income statements, balance sheets, and the tax returns required by Japanese authorities. For a full service-level comparison, including costs and when each is required, see our bookkeeping vs. accounting comparison. This FAQ focuses on the practical bookkeeping compliance requirements themselves.

Bookkeeping for foreign companies in Japan isn't optional and it isn't simple. The requirements are specific, the deadlines are firm, and the penalties for non-compliance are material.

In Japan, this distinction matters because bookkeeping must begin the moment your company is registered, whether or not you have employees or revenue. The Companies Act requires every company to prepare accurate accounting books in a timely manner, and Japanese tax law requires those books to record transactions using recognized chart-of-accounts conventions, even before your first sale.

Most foreign companies don't recognize this timing gap. They assume bookkeeping can start when revenue arrives or when accounting becomes mandatory. Under Japanese law, that's incorrect. Bookkeeping is a legal requirement from incorporation onward, and every corporation must file a corporate tax return within two months of each fiscal year-end, even with zero revenue. (The often-cited ¥10 million figure is the consumption-tax registration threshold, not a trigger for bookkeeping or tax-return obligations.)

Do I Need a Bookkeeper Before Accounting Is Required?

Yes. Japanese law requires bookkeeping records to exist from the date of company registration, regardless of whether substantial accounting work is yet needed. Even if your startup is still pre-revenue or has minimal transactions, you are legally required to maintain organized records in compliance with Japanese standards.

Here's the timeline: when you incorporate a company in Japan, bookkeeping obligations begin immediately. The specific rules depend on your entity type and structure, but the principle is consistent. If you register a KK (Kabushiki Kaisha, or stock company) in January, you must record transactions from the registration date onward, even if you don't make your first sale until July. Books and supporting documents must be retained for years after each filing (see the retention rules below), and the absence of records for the incorporation-to-first-filing period is exactly the kind of gap that creates problems in a tax audit.

Formal accounting work scales with your activity, but the baseline filing obligation does not: even a KK with no revenue must file a corporate tax return within two months of its first fiscal year-end, and the books behind that return must exist from day one. This is where foreign companies struggle, they often wait until they have accountants, when they should have bookkeepers in place from the start. The solution is to start bookkeeping immediately after incorporation, either through an internal record-keeper or by outsourcing to a bilingual bookkeeping provider familiar with Japanese chart-of-accounts requirements.

What Are Japan-Specific Bookkeeping Requirements for Foreign Entities?

Foreign companies operating in Japan must maintain bookkeeping records in Japanese currency (yen), using chart-of-accounts conventions recognized under Japanese accounting standards, with books and supporting documents retained for seven years under tax law, and ten years under the Companies Act. Certain transaction types, withholding taxes, employee compensation, foreign-currency transactions, require specialized tracking that differs from bookkeeping in your home country.

The core requirements include:

• Chart of Accounts (勘定科目): Japan doesn't impose a single mandatory chart, but practice follows the standard account categories used under JGAAP (Japanese Generally Accepted Accounting Principles) and built into Japanese accounting software. Account names should be in Japanese, or carry Japanese annotations, so they are legible to tax examiners during audits.
• Timely Transaction Recording (日々の取引記録): All business transactions, sales, purchases, payroll, bank transfers, loan repayments, should be recorded promptly and in chronological order in a journal. Blue-return status (the filing status virtually all serious companies elect) requires orderly double-entry books.
• Withholding Tax Tracking (源泉徴収): If you pay salaries, contractor fees, royalties, or interest, you must withhold tax at statutory rates and remit it, generally by the 10th of the following month. Withholding tax obligations are administered separately from general bookkeeping but must be recorded in your books.
• Receipt and Invoice Retention (証憑書類): Books and transaction evidence (receipts, invoices, contracts) must be retained for seven years from the day after the tax-return filing deadline, ten years for fiscal years generating carried-forward losses, and the Companies Act separately requires accounting books to be kept for ten years, so ten years is the safe standard. Under the Electronic Book Preservation Act (電子帳簿保存法), transaction data exchanged electronically (e.g., PDF invoices received by email) must be stored electronically, a requirement fully mandatory since January 2024.
• Currency Conversion (外貨建取引): Foreign-currency transactions must be recorded in yen, generally at the TTM (telegraphic transfer middle) rate quoted by your bank on the transaction date. Period-end revaluation of foreign-currency balances follows specific tax rules that depend on the item and any elections made.
• Multi-Entity Separation: If you operate multiple entities (a Japanese subsidiary, a branch, or a permanent establishment), bookkeeping must be maintained separately for each legal entity, with consolidation handled at the accounting stage.

Foreign companies most often stumble on the withholding tax and currency conversion rules, because these differ significantly from Anglo-American and European practice. The best approach is to set up bookkeeping templates with a Japan-experienced accountant or bookkeeping service before your first transaction occurs.

Bookkeeping Requirements by Business Structure in Japan

The level of bookkeeping detail required varies depending on whether you establish a branch, subsidiary, permanent establishment, or representative office. Here's a comparison of the key bookkeeping obligations:

Key insight: a branch of a foreign company faces the most demanding bookkeeping environment because the National Tax Agency treats it as a taxable presence whose profits must be cleanly separated from the head office. Permanent establishments, even those never formally registered, trigger the same obligations retroactively once identified during an audit. This is one reason foreign companies often choose a subsidiary structure (KK or GK) instead: it provides a clear legal boundary and a simpler bookkeeping architecture, though it requires its own complete set of corporate books.

When Does Bookkeeping Transition to Formal Accounting?

Bookkeeping transitions into formal accounting when your company reaches specific milestones. Understanding this transition is critical for foreign companies, because the workload and cost structure change at each stage.

Corporate Tax Filing (Always Required): Every corporation must reconcile its books into financial statements (決算書) and file a corporate tax return (法人税申告書) within two months of fiscal year-end, regardless of revenue, there is no de minimis exemption. Separately, once taxable sales in the base period (generally two fiscal years prior) exceed ¥10 million, the company becomes a consumption-tax payer; many companies also register voluntarily under the qualified invoice system so customers can claim input credits.

Fiscal Year-End Deadline: All companies must close their books at the end of their designated fiscal year. March 31 is the single most common choice in Japan (roughly 20% of all corporations, and a majority of large listed companies), but foreign-owned entities often elect December 31 or their parent company's fiscal year. At year-end, bookkeeping records must be reconciled into a formal balance sheet and income statement, this is accounting work.

Employee or Contractor Milestone: Once you employ even one person or regularly pay contractors, you must withhold income tax and remit it, generally by the 10th of the following month via withholding tax payment statements (a semi-annual remittance option exists for employers with fewer than 10 employees), and issue annual withholding slips (源泉徴収票). This requires reconciling payroll records with tax withholdings, which is accounting work.

Foreign Investment or Fund Structure: If your company is a fund administrator, private equity entity, or family office, substantive accounting obligations begin immediately, regardless of revenue. Fund administration in Japan requires quarterly or semi-annual financial reporting to investors and regulators.

A typical timeline: foreign founder incorporates in Month 1 → bookkeeping begins immediately → first year is often low-transaction → fiscal year-end in Month 12 → accounting reconciliation and corporate tax filing by Month 14 (a one-month filing extension can be elected for corporate tax, though payment interest may apply). If the company remains pre-revenue, the accounting phase might be simple, but the bookkeeping behind it still must be complete.

Key Takeaways

• Bookkeeping starts immediately upon registration. Japanese law requires transaction records from the date your company is registered, not from when you have revenue or employees, and a corporate tax return is due within two months of every fiscal year-end, even at zero revenue. This is a critical distinction many foreign founders miss.
• Withholding tax tracking is built into bookkeeping. Unlike many Western countries where payroll withholding is handled as a separate stream, Japanese bookkeeping integrates withholding tax obligations into the core chart of accounts, with monthly remittance deadlines, requiring specialized template setup.
• Long record retention is non-negotiable. Tax law requires books and supporting documents to be kept seven years (ten for loss-carryforward years), and the Companies Act requires accounting books be kept ten years. The NTA can reassess up to five years back, seven where fraud is suspected, so missing records in that window invite penalties and estimated assessments.
• The chart of accounts must follow Japanese conventions. Using your home country's account structure or a generic cloud-accounting template doesn't satisfy Japanese practice. Account naming, categorization, and detail level should align with JGAAP conventions so the books are audit-legible.
• Outsourcing bookkeeping early prevents costly remediation. Many foreign companies attempt in-house bookkeeping and discover mid-year that their records don't meet Japanese requirements. Engaging a bilingual bookkeeping service from day one, often bundled with incorporation support, ensures compliance and simplifies the transition to formal accounting.

Working with AQ Partners. Our Tokyo team provides back office operations for foreign companies operating in Japan, covering the requirements described above end to end. Book a consultation to discuss your situation.

Sources

National Tax Agency (Japan). Tax Answer No. 5930: Retention Periods for Books and Documents. nta.go.jp

National Tax Agency (Japan). Electronic Book Preservation Act (電子帳簿保存法) Guidance. nta.go.jp

JETRO. Investing in Japan, Section 3: Taxes in Japan. jetro.go.jp

e-Gov. Companies Act (会社法), Article 432 (Preparation and Retention of Accounting Books). elaws.e-gov.go.jp

Frequently Asked Questions

Q: Can I use cloud accounting software like QuickBooks or Xero for Japanese bookkeeping?

Cloud accounting software can support Japanese bookkeeping, but only if your chart of accounts is configured to match Japanese conventions and the software handles multi-currency transactions with yen conversion. QuickBooks and Xero default to English-language account structures and are localized for Japan mainly through third-party integrations. Many foreign companies use Xero initially, then migrate to Japan-native software (such as freee, Money Forward, or OBIC) as accounting formalizes, Japan-native tools also handle qualified-invoice and Electronic Book Preservation Act requirements out of the box. The best approach is to confirm with a Japan accountant that your chosen software's chart of accounts and reporting comply before you begin transacting.

Q: Do I need separate bookkeeping for each of my company's business lines or divisions?

Not legally required, but operationally recommended. Japanese bookkeeping rules don't mandate separate records for business lines within a single legal entity.

But if you have multiple revenue streams, cost centers, or geographic operations, many companies use department codes within a single chart of accounts to track performance by division. This supports both internal management reporting and tax audit defense (it shows profit and loss by function, which examiners may scrutinize separately). If you have separate legal entities (e.g., a Japan subsidiary and a Singapore affiliate), each must have its own bookkeeping.

Q: What happens if I don't maintain bookkeeping records during my first year, before formal accounting is required?

You face significant penalty risk. If the National Tax Agency audits and finds gaps in your records, additional taxes apply on any resulting deficiency: roughly 10–15% for under-reporting, 15–30% for non-filing, and 35–40% where concealment or falsification is found, plus delinquency interest. If records are missing entirely, the tax authority can make an estimated assessment (推計課税) of income based on available evidence such as bank statements. For a startup with minimal transactions this might seem low-risk; in practice, foreign ownership and regulated-industry activity both raise examination interest. The cost of remedial bookkeeping and audit defense far exceeds the cost of outsourced bookkeeping during the early phase.

Q: How do I reconcile my foreign currency transactions for bookkeeping purposes?

Transactions must be recorded in Japanese yen, generally at the TTM rate quoted by your company's bank on the transaction date (consistent use of a reasonable published rate is what matters). At period-end, foreign-currency monetary balances are revalued under rules that depend on the item and the tax elections made, short-term receivables and payables are typically revalued at the period-end rate, while other items may stay at historical rates. Many companies use a dedicated foreign-exchange gain/loss account in their chart of accounts to track this. Your accountant should advise on the correct treatment for your circumstances.

Q: Can I hire a part-time bookkeeper in Japan, or should I outsource to a service provider?

Both options exist, but each has tradeoffs. A part-time in-house bookkeeper (typically around ¥2,000–3,000/hour on a contract basis) provides direct control and institutional knowledge but may struggle with Japan-specific withholding and consumption-tax treatment. A bilingual outsourced bookkeeping service (typically ¥50,000–200,000/month depending on transaction volume) ensures compliance, provides audit-ready documentation, and scales as you grow. For foreign startups unfamiliar with Japanese requirements, outsourcing is usually the safer choice for the first 18–24 months; once processes are established and volume is stable, bringing the work in-house becomes viable.

Q: Does a representative office need to maintain bookkeeping records?

Not if it is truly non-operational (no transactions, no employees, no revenue). A representative office (駐在員事務所) may conduct research and liaison activities but not business transactions. But once it engages in business activity, makes sales, pays rent from a corporate account, or employs staff, the National Tax Agency may deem it a permanent establishment or de facto branch, triggering full bookkeeping and tax filing obligations retroactively. To avoid this classification, representative offices must maintain strict separation of funds and activities, and any transaction activity should prompt consultation with a tax advisor about whether bookkeeping obligations have been triggered.