Japan tightens crypto fraud controls for exchanges

TLDR

Japan is tightening exchange-level controls to slow suspicious crypto withdrawals and reduce fraud against retail users.

1. bitFlyer (Japans largest exchange) will add a 48?hour Cooldown on some crypto transfers after yen deposits, directly targeting scam-related outflows.
2. The move follows guidance from Japans Financial Services Agency and National Police Agency urging withdrawal limits and stronger monitoring to combat growing crypto fraud.
3. Other Japanese platforms already use similar controls, and regulators may push for wider adoption, affecting how quickly users can move newly deposited funds off exchange.

Deep Dive

1. What BitFlyer Is Changing

bitFlyer will introduce a Cooldown policy on 15 Oct 2026 that restricts crypto transfers for newly verified individual customers after they deposit yen.

For users whose identity verification was completed within the last 90 days, the exchange will block transfers to external wallets and other exchanges for up to 48 hours on amounts exceeding a 100,000 buffer, calculated over each rolling 48?hour deposit window. Deposits of 100,000 or less are unaffected. Quick Deposit payments are excluded because they already face a seven?day transfer limit. Trading, holding, receiving crypto and withdrawing yen remain available, so the measure targets rapid on-chain or cross?exchange movements of fresh fiat inflows.

This change is designed to disrupt common scam patterns where victims are pressured to deposit fiat and immediately send crypto to an attacker-controlled address.

2. Japans Anti?Fraud Push

The Cooldown follows an August call by Japans Financial Services Agency (FSA) and National Police Agency for exchanges to introduce temporary withdrawal restrictions, stronger transaction monitoring and faster responses to suspicious activity, focusing on unusually large or frequent transactions and abrupt crypto withdrawals to risky wallets.

Japan has already tightened rules around stablecoins and intermediaries, and the new guidance shifts attention to behaviour after onboarding, not just KYC at account opening. The bitFlyer announcement notes this broader context and cites domestic fraud risks as the main driver. Binance Japan reportedly uses withdrawal questionnaires, risky?address warnings and temporary restrictions, showing that large platforms are aligning with the FSAs expectations.

3. Impact On Users And Markets

For everyday users, the main impact is timing. New or recently verified customers in Japan will find it harder to immediately move newly deposited fiat into crypto and out to self?custody or offshore venues. Multiple deposits can create overlapping cooldowns, further extending delays on larger transfers.

For markets, these measures mainly affect the speed of outflows from Japanese exchanges rather than core trading liquidity. However, they signal a regulatory trend toward built?in fraud controls at the exchange level and could become a template for other jurisdictions that are seeing similar scam patterns around crypto payments and ATMs.

Conclusion

Japans new fraud controls are less about banning crypto and more about slowing high?risk withdrawal patterns so scams cannot drain funds instantly. For crypto users, the practical change is tighter timing and scrutiny on moving newly deposited money off exchange, while for the market it highlights a growing global focus on investor protection and behavioural controls around crypto flows.