Best crypto relayers in Japan
Coinbase CDP Server Wallets (API-key wallets) ranks highest in ChainChoice’s published relayers ranking among the providers that list Japan — A backend API. Among the highest crypto tax rates globally (up to 55%). Reform proposals to move to a flat 20% are pending.
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Reviewed means every product ranked on this page was read against its sources on or after that date; every ranked category is re-read at least every 45 days. Models research, extract and parse. A deterministic engine ranks. Every quote passes an adversarial refute pass.
Accountable for this review: Mathias Siemonsmeier, Founder.
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Which crypto relayer service should Japan residents use in November 2026?
Coinbase CDP Server Wallets (API-key wallets) ranks highest in ChainChoice’s published relayers ranking among the providers that list Japan — A backend API. The order is the published ranking itself; providers whose terms exclude Japan are removed. Check authorisation with FSA before depositing.
- Japan residents holding capital in JPY
- Users who need FSA-aligned compliance and audit-grade reporting
- Buy-and-hold profiles benefiting from Japan's tax treatment
- Sophisticated retail and family-office treasurers
- Derivatives / perpetuals traders (use a regulated futures venue instead)
- Privacy-focused users avoiding KYC (these are licensed venues)
- Day-traders chasing the lowest spreads regardless of regulator posture
- Anyone needing a service FSA does not currently authorise
General guidance for Japan: the ranking engine does not compute these notes and they do not change the order below. If none fits you, answer the Find My Best questions for a result for your profile.
7 relayers listed for Japan
In ChainChoice’s published ranking order, from this category’s 7 providers: those whose terms exclude Japan are removed; those silent on it come last. Each chip names the basis: a dated check, a region listing, or the provider's own claim.
#1 for JapanCoinbase CDP Server Wallets (API-key wallets)#1 globallyProvider states broad availability A backend API that creates EOAs whose private keys are generated inside Coinbase's AWS Nitro Enclave TEE, then signs and broadcasts transactions from them on seven EVM mainnets and Solana, with import and export of the raw private key both exposed as REST endpoints.
What a stolen API credential can do before anyone notices — 10/10What the relayer is authorised to do, and whether you can keep the address — 9/10Where the gas float sits and how you get it back — 8/10#2 for JapanPrivy server wallets#2 globallyProvider states broad availability A REST/SDK service that generates or imports secp256k1 and Ed25519 keys into a TEE, holds them under an app-held P-256 authorization key (optionally an m-of-n key quorum), and signs and broadcasts transactions from those addresses on request from the buyer's backend — with gas paid by default from the wallet's own native balance, or optionally sponsored from a prepaid app-level gas-credits balance, or collected on-chain from the wallet's stablecoin balance by an ERC-20 paymaster in 'User pays' mode.
What the relayer is authorised to do, and whether you can keep the address — 9/10What a stolen API credential can do before anyone notices — 9/10#3 for JapanOpenZeppelin Relayer#3 globallyProvider states broad availability An AGPL-licensed Rust service a backend team runs itself to submit transactions from its own EOA on EVM, Solana and Stellar networks, where the signing key stays in the buyer's own keystore file, HashiCorp Vault, AWS KMS, Google Cloud KMS, Turnkey or Coinbase CDP account rather than in a vendor's vault.
What the relayer is authorised to do, and whether you can keep the address — 10/10Where the gas float sits and how you get it back — 9/10#4 for JapanSequence Transactions API (Relayer)#4 globallyProvider states broad availability A hosted relayer that accepts a signed Sequence smart-contract-wallet transaction bundle from a backend, fronts the network gas either from a Builder-funded sponsorship balance or from an ERC-20 fee transaction included inside the bundle, and submits it on chain-specific relayer hosts (52 published in the vendor's OpenAPI servers block, of which 21 mainnet hosts answered live on 11 August 2026).
What the relayer is authorised to do, and whether you can keep the address — 9/10Where the gas float sits and how you get it back — 7/10#5 for JapanCircle Gas Station#5 globallyProvider states broad availability Circle fronts network fees for transactions sent from Circle-hosted Programmable Wallets — through a Circle-owned, upgradeable ERC-4337 paymaster proxy on EntryPoint v0.6 on its supported EVM mainnets and fee-payer accounts on Solana and Aptos — governed by console-configured gas-spend policies and billed back to the developer's card after the fact.
Where the gas float sits and how you get it back — 8/10Exactly-once execution and stuck-queue recovery — 7/10#6 for JapanOpenfort backend wallets#6 globallyProvider states broad availability A custodial server-side signer: Openfort generates and holds an EVM or Solana private key inside a GCP Confidential Space TEE, exposes sign/import/export over a REST API gated by a fail-closed rule-based policy engine, and can also submit transactions for that wallet via EIP-7702 delegation — a send the policy engine sees only as signEvmHash, so its transaction rules do not run — with gas optionally sponsored from a prepaid project credit balance.
What the relayer is authorised to do, and whether you can keep the address — 9/10Where the gas float sits and how you get it back — 7/10#7 for JapanGelato Relay#7 globallyProvider states broad availability A hosted meta-transaction relay, as last documented on 2026-08-11: the buyer's backend posts a target address and calldata to Gelato's JSON-RPC API with an API key, and Gelato's executors front the gas and submit the transaction, billing a prefunded USDC "Gas Tank" balance held on Polygon.
What the relayer is authorised to do, and whether you can keep the address — 7/10What a stolen API credential can do before anyone notices — 6/10
Commission: None of these providers pays ChainChoice anything for these links. Disclosure
No referral fee in your country: this link opens the provider’s own site.
Crypto products are high risk. Check the provider is authorised where you live before you deposit.
- Liveness failure: the operator stops, censors you or loses data.Scored by Exactly-once execution and stuck-queue recovery · 26% (Coinbase CDP Server Wallets (API-key wallets) 7/10, Privy server wallets 7/10, OpenZeppelin Relayer 6/10)
- Custody failure: whoever holds the assets loses or withholds them.Scored by What the relayer is authorised to do, and whether you can keep the address · 32% (Coinbase CDP Server Wallets (API-key wallets) 9/10, Privy server wallets 9/10, OpenZeppelin Relayer 10/10)Scored by What a stolen API credential can do before anyone notices · 22% (Coinbase CDP Server Wallets (API-key wallets) 10/10, Privy server wallets 9/10, OpenZeppelin Relayer 3/10)Scored by Where the gas float sits and how you get it back · 20% (Coinbase CDP Server Wallets (API-key wallets) 8/10, Privy server wallets 7/10, OpenZeppelin Relayer 9/10)
Each cell is verified against the provider's filings or the FSA register; a gap shows "—", never an estimate.
| Provider | Taker fee in Japan | KYC tier | JPY rails | FSA license |
|---|---|---|---|---|
| #1Coinbase CDP Server Wallets (API-key wallets) | — | — | — | — |
| #2Privy server wallets | — | — | — | — |
| #3OpenZeppelin Relayer | — | — | — | — |
| #4Sequence Transactions API (Relayer) | — | — | — | — |
| #5Circle Gas Station | — | — | — | — |
Source: ChainChoice provider catalog cross-referenced with the FSA register; each fee as of its entry's latest verification (accuracy methodology).
Is using a crypto relayer service legal in Japan?
Yes. Crypto relayers are regulated in Japan by Financial Services Agency (FSA). Always verify a platform's licensing status with FSA before transacting.
How is crypto taxed in Japan?
Crypto gains taxed as miscellaneous income at progressive rates up to 55% (national + local). Losses cannot offset other income categories. Editorial summary, not tax advice: consult a qualified tax advisor in Japan before filing.
What payment methods work for buying crypto in Japan?
The most common rails for retail onramps in Japan are: Wire, Convenience Store, Pay-easy. Most regulated platforms support at least the first of these. Card payments may incur 2-4% fees vs. ~0.5% for bank transfers.
Are international platforms (Coinbase, Kraken, Binance) available in Japan?
Availability varies by platform and product. Japan has its own licensing regime under FSA, and not every global platform is registered. The shortlist above removes platforms whose terms exclude Japan; the chip on each row says whether availability is verified, listed or unstated.