FBAR for US Persons in Japan

Who has to file

A US person — US citizen, green-card holder, or US tax resident, including one living in Japan — must file an FBAR if both of these are true:

1. They had a financial interest in, or signature or other authority over, at least one financial account located outside the United States, and
2. The aggregate value of all those foreign accounts exceeded $10,000 at any time during the calendar year.

Three things in that definition catch people in Japan:

• Living abroad doesn’t exempt you. The requirement follows the person, not the address.
• Signature authority alone is enough. An account you can sign on but don’t own — a relative’s account, an employer account — can still trigger the filing requirement.
• It has nothing to do with income. The account doesn’t need to earn a single yen of interest. The FBAR is an information report filed with FinCEN (a Treasury bureau), not a tax form — filing it costs nothing and creates no tax by itself.

The $10,000 trigger

The threshold is the aggregate across all foreign accounts, at the highest single moment of the year — not per-account, and not the year-end balance.

• A ¥500,000 ゆうちょyūcho account plus a ¥900,000 bank account already crosses the line at recent exchange rates.
• A single large transfer can trigger the requirement by itself: wire $15,000 through your Japanese account for a car or a deposit, spend it the next week, end the year near zero — you still must file, because the aggregate exceeded $10,000 “at any time.”
• At the Treasury rate for December 31, 2025 (¥156.61 per dollar), $10,000 corresponds to roughly ¥1.57 million across everything combined.

What counts as an account in Japan

An account at a financial institution located outside the United States is a foreign financial account. For a US person in Japan that typically includes:

• Ordinary bank accounts (普通預金futsū yokin, 当座預金tōza yokin) at any Japanese bank
• ゆうちょ銀行Yūcho Ginkō (Japan Post Bank) accounts, including old 郵便貯金yūbin chokin books that may have sat untouched for years
• Time and installment deposits (定期預金teiki yokin, 定額貯金teigaku chokin, 定期貯金teiki chokin)
• Securities and brokerage accounts at Japanese brokers
• Insurance or pension products with cash value — whether a specific Japanese product is reportable can be genuinely unclear; this is a point to confirm with a professional

Notable exceptions (no FBAR reporting for the account):

• Accounts at a US military banking facility — the on-base bank serving a US installation is not a “foreign” account, which matters for the SOFA community
• Foreign accounts held inside an IRA you own, or inside a qualified retirement plan you participate in
• Correspondent/nostro accounts and accounts of governmental entities

Real estate is not an account and is not FBAR-reportable (a bank account used to pay for property is).

Working out each account’s maximum value

For every reportable account, you report the greatest value it held during the calendar year. You may rely on periodic account statements if they fairly reflect the maximum value.

Japan-specific realities of actually doing this:

• Passbooks (通帳tsūchō) are your statement. The running-balance column (差引残高sashihiki zandaka) is what you scan for the year’s peak — the largest number that appears in the column during the year, not the December figure.
• Watch for 合算gassan (consolidated) rows. If a passbook went unprinted for a long stretch, the bank may collapse many transactions into one 合算 line. The true peak inside that stretch is invisible; you may need a transaction history from the bank for those years.
• A dormant account still counts. The test is the maximum balance during the year, and an untouched balance is still a balance. An old ゆうちょ book with ¥400,000 sitting in it counts toward the aggregate every single year.
• Time deposits (定期預金 / 定額貯金): for each year of the deposit’s life, the maximum value is approximately the principal (Japanese FD interest rates are tiny), and in the payout year it’s the principal plus accrued interest. A 定額貯金 certificate that bundles several sub-deposits is best treated as several accounts — each row has its own deposit and maturity.
• Era dates trip people up. Japanese documents date in 和暦wareki: 令和Reiwa6年 is 2024 (Reiwa + 2018), 平成Heisei31年 is 2019 (Heisei + 1988), 昭和Shōwa63年 is 1988 (Showa + 1925). Misreading 令和5年 as “2005” puts a balance in the wrong filing year.

Converting yen to dollars

Convert each account’s maximum value using the Treasury Reporting Rate of Exchange for the last day of the calendar year — published by the Bureau of the Fiscal Service, not the market rate and not your bank’s rate. For December 31, 2025 the Japan–Yen rate is 156.61.

The math: maximum balance in yen ÷ year-end rate = USD value. A ¥2,400,000 peak ÷ 156.61 = $15,325.

If Treasury publishes no rate for a currency, you may use another verifiable rate and state its source.

Filing: when, where, how

• What: FinCEN Form 114 — one report per filer, listing all reportable accounts
• Where: electronically through FinCEN’s BSA E-Filing System (paper filing requires specific FinCEN approval). It is not part of your 1040 — don’t mail anything to the IRS
• When: April 15 following the calendar year, with an automatic extension to October 15 — no extension form, no request, no penalty for using it

Spouses, kids, and family accounts

• One spouse can file for both — sometimes. A spouse doesn’t need a separate FBAR if all of their reportable accounts are jointly owned with the filing spouse, the filing spouse reports those joint accounts on a timely FBAR, and both spouses complete Form 114a (kept with your records, not submitted). If the non-filing spouse has even one separate account of their own, both must file.
• Joint accounts report the full value. Each US-person owner of a joint account generally reports the account’s entire maximum value, not a share of it.
• A Japanese-citizen spouse with no US status files nothing — FBAR applies to US persons only. But a US person named on, or able to sign on, the Japanese spouse’s accounts may have to report those accounts.
• Children file their own FBARs. A dual-citizen child whose grandparents opened a ゆうちょ account in their name has the same $10,000 test applied to their accounts. A parent or guardian may sign the filing on the child’s behalf, but the FBAR is the child’s.

If you’re behind

Discovering FBAR years late is one of the most common experiences for Americans in Japan. The exposure depends on your tax situation, and the IRS provides two main self-correction paths:

• Delinquent FBAR submission procedures — if you properly reported and paid US tax on the income from the foreign accounts (or there was none) and the IRS hasn’t contacted you, you file the late FBARs electronically with a brief explanation, and the IRS will not impose a penalty.
• Streamlined Foreign Offshore Procedures — if unreported income is involved and your conduct was non-willful, residents abroad (physically outside the US at least 330 full days in one of the last three years) can file 3 years of amended returns and 6 years of FBARs with a certification of non-willfulness; failure-to-file, accuracy-related, and FBAR penalties are waived.

Talk to a US-international tax professional before filing anything late. Choosing the wrong path — or quietly filing old forms outside any procedure — can convert a fixable situation into an expensive one.

Penalties

As of June 2026 (figures are inflation-adjusted; the 2025 amounts remain in effect):

• Non-willful violation: up to $16,536 — applied per report, not per account (Supreme Court, Bittner v. United States, 2023)
• Willful violation: the greater of $165,353 or 50% of the account balance
• Criminal violations can mean fines and up to five years in prison

In practice, non-willful penalties are discretionary and the self-correction procedures above exist precisely so that ordinary unaware filers can fix things at little or no cost — which is why acting before the IRS contacts you matters.

Records to keep

Keep, for five years from the FBAR due date: the name on each account, the account number, the financial institution’s name and address, the account type, and the maximum value during the year. A scanned passbook covers most of this.

FBAR is not Form 8938

FATCA’s Form 8938 (filed with your tax return, to the IRS) is a separate regime with different thresholds and definitions. Filing one does not satisfy the other — many people in Japan must file both, and some accounts appear on one but not the other. That comparison deserves its own guide.

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This guide is general information, not tax or legal advice. FBAR rules, rates, and penalty figures change — verify against the sources below before filing, and bring questions about your specific situation to a professional experienced with US-international tax.