If you've ever traded on an overseas crypto exchange, Japan's regulators have a message for you, and it keeps getting louder.

On March 26, 2026, Japan's Financial Services Agency (FSA) issued a second warning to KuCoin, one of the world's largest cryptocurrency exchanges. The first came in November 2024, for running an unregistered crypto exchange business. This one is for soliciting over-the-counter derivatives without a licence. Two different laws, two separate warnings.

KuCoin's Second Warning

The FSA updated its list of unregistered financial instruments operators on March 26, 2026, adding KuCoin alongside NeonFX, GTCFX, and theoption. The other three names are unfamiliar to most crypto users. KuCoin is not: it is a globally recognized exchange with millions of users, and it already appeared on Japan's warning list in November 2024.

In that earlier case, KuCoin was flagged under the Payment Services Act for operating a crypto exchange business targeting Japanese residents without registering with the FSA. This time, the warning falls under the Financial Instruments and Exchange Act (FIEA) for soliciting over-the-counter derivative transactions.

KuCoin announced it would stop serving Japanese traders in June 2018, but access from Japan was never fully blocked. In February 2025, its app was pulled from Japan's Apple App Store and Google Play Store, making the platform harder, though not impossible, to reach.

How Strict Is Japan's Registration System?

Japan was one of the first countries in the world to regulate cryptocurrency, driven by the traumatic collapse of Mt. Gox in 2014. When the Tokyo-based exchange went bankrupt and roughly $470 million in Bitcoin vanished, it became clear that crypto needed proper oversight.

In April 2017, Japan implemented a revised Payment Services Act requiring all crypto exchange operators to register with the FSA. This registration system functions more like a licensing regime. The requirements are extensive:

  • Segregation of customer assets: Exchanges must keep client funds completely separate from corporate funds
  • 95% cold storage rule: At least 95% of customer crypto assets must be stored in offline wallets
  • Strict KYC/AML: Rigorous identity verification and anti-money laundering procedures
  • JVCEA membership: Compliance with guidelines from the Japan Virtual and Crypto Assets Exchange Association, the industry's self-regulatory body
  • Whitelist system: Only vetted tokens can be traded, currently around 120 by JVCEA's count, out of the thousands that exist globally
  • Regular audits and financial reporting

As of February 2026, there are 28 registered crypto exchange operators in Japan. Major names include bitFlyer, Coincheck, GMO Coin, SBI VC Trade, bitbank, BITPoint, Rakuten Wallet, LINE BITMAX, and OKJ.

The FTX Lesson

The value of Japan's strict approach showed itself during the FTX collapse in November 2022. Users of FTX's global platform lost billions. FTX Japan, operating under FSA supervision, held roughly ¥19 billion (about $140 million) belonging to some 100,000 customers in segregated accounts. Withdrawals resumed in February 2023.

This wasn't luck. It was regulation. Japan's requirement that exchanges separate customer money and keep most of it in cold storage meant that even when the parent company imploded, Japanese customers were protected. For overseas exchanges operating without registration, no such safety net exists.

Penalties Have More Than Tripled

The FSA isn't just issuing warnings. An amendment enacted on July 15, 2026 sharply raises the penalties for unregistered crypto sales and derivatives solicitation:

  • Previously, under the Payment Services Act: Up to 3 years imprisonment or fines up to ¥3 million (~$20,000)
  • Now, under FIEA: Up to 10 years imprisonment or fines up to ¥10 million (~$65,000)

Enforcement also shifts from administrative guidance to criminal investigation powers, including the authority to seize evidence and conduct formal interrogations. These enforcement provisions take effect 20 days after promulgation, ahead of the rest of the reform. For overseas exchanges that have been shrugging off FSA warnings, that is a serious escalation.

How Japan Compares to Other Countries

United States (SEC/CFTC)

The US still lacks a comprehensive federal framework for the crypto market as a whole. The SEC has been treating many tokens as securities, while the CFTC claims jurisdiction over crypto commodities. Stablecoins are the exception: the GENIUS Act was signed into law in July 2025. The CLARITY Act, which would settle the SEC/CFTC boundary across the wider market, passed the House in July 2025 and has been stuck in the Senate since. Exchanges still navigate a patchwork of state-by-state money transmitter licenses.

European Union (MiCA)

The EU's Markets in Crypto-Assets Regulation (MiCA), fully implemented in December 2024, created a unified framework across all member states. One license from any EU country grants a "passport" to operate across the entire bloc. KuCoin itself obtained a MiCAR license through its Austrian subsidiary in November 2025, which leaves it fully compliant in Europe while unlicensed in Japan.

Singapore (MAS)

The Monetary Authority of Singapore operates a licensing regime that balances strict regulation with innovation-friendly policies like regulatory sandboxes. Many major exchanges have set up headquarters there, attracted by Singapore's position as Asia's fintech hub.

Quick Comparison

Feature Japan United States EU Singapore
Framework Registration → FIEA (in force 2027) No federal market-structure law MiCA unified regulation MAS licensing
Tax Rate Up to 55% → 20% (from 2028) Up to 37% Varies by country 0% (capital gains)
Customer Protection 95% cold storage mandate Varies by exchange MiCA requirements MAS requirements
Token Access ~120 whitelisted Unrestricted MiCA standards MAS-approved

The FIEA Transition Is Now Law

Japan has just completed the most significant crypto regulatory transformation of any major economy. The bill moving crypto from the Payment Services Act to the Financial Instruments and Exchange Act (FIEA) was submitted to the Diet on April 10, 2026, cleared the House of Representatives on June 11, and passed the House of Councillors on July 15. It takes effect sometime in 2027.

Key changes:

  • Reclassification: 105 tokens become financial products rather than digital payment tools
  • Insider trading rules: Crypto falls under the same insider trading and market manipulation regime as stocks
  • Disclosure requirements: Basic information about each approved token must be published
  • Enforcement: Heavier penalties for unregistered operators, plus criminal investigation powers for the securities watchdog
  • Investment trusts: Crypto-linked investment funds become permissible
  • ETF pathway: The legal framework for Bitcoin and crypto ETFs opens up

Tax has moved too. The income tax amendment cutting crypto gains from a maximum 55% under aggregate taxation to a flat 20% under separate taxation was enacted on March 31, 2026. It is triggered by the FIEA reform taking effect, so if that lands in 2027, the 20% rate applies from January 2028.

The result puts Japan somewhere unusual: the world's strictest exchange regulations paired with stock-equivalent tax treatment.

The Hurdles for Foreign Exchanges Entering Japan

The full list of all 28 registered operators sits on the FSA's official website. For an overseas exchange hoping to join it, the barriers are formidable:

  1. Japanese entity required: Must establish a local corporation
  2. FSA registration: A rigorous application and review process
  3. JVCEA membership: Must join the self-regulatory organization
  4. Token restrictions: Can only offer FSA-approved whitelist tokens
  5. Asset segregation infrastructure: Must build compliant custody systems
  6. Japanese-language support: Full customer service in Japanese required
  7. Tax reporting compliance: Must support Japan's tax reporting requirements

Some have made it through. Binance, after receiving an FSA warning in 2021, entered Japan through a local subsidiary (Binance Japan/Sakura Exchange BitCoin). Many others simply block Japanese users rather than face the cost of compliance.

Bybit announced on December 22, 2025 that it would stop serving Japanese residents, after three FSA warnings over several years. Accounts have been restricted in stages since 2026.

Japan's crypto regulations were born from the painful lessons of Mt. Gox. What started as a reaction to disaster has become arguably the world's most comprehensive exchange oversight system. The FIEA transition adds an investment-friendly layer on top of that strict foundation, and other countries will be watching how it lands.

How does your country regulate crypto exchanges? Can you freely use overseas platforms, or do you have a registration system like Japan's? We'd love to hear about your experience.

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