Exchange review · East Asia
Coincheck Review 2027: Is It the Right Exchange for You?
Coincheck is the crypto app most Japanese beginners download first. It is simple, widely advertised and backed by Monex Group, one of Japan's leading online brokerages. Its parent company is listed on Nasdaq in the United States. It is also the exchange that suffered one of the biggest crypto thefts in history, in January 2018, and then rebuilt itself under new ownership and full regulation.
That turnaround is one of the more instructive stories in the industry. This 2027 review explains what Coincheck offers today, how much it really costs and who it suits.
Before and After 2018
Coincheck's origins go back to 2012, and it began offering crypto exchange services in 2014. By late 2017 it was one of the busiest platforms in Japan, growing so fast that its internal controls did not keep pace. It was still operating under provisional status while its application for registration was pending.
On 26 January 2018 hackers stole about 523 million NEM tokens, worth roughly $530 million at the time, from a single online wallet that lacked multi-signature protection. Around 260,000 customers were affected. It was the largest crypto theft recorded up to then.
Coincheck promised to repay every affected customer from its own funds and did so within weeks, in yen. Regulators imposed business improvement orders, and in April 2018 Monex Group bought the company and replaced its management. Coincheck completed its registration with the Financial Services Agency in January 2019. In December 2024 its holding company listed on Nasdaq under the ticker CNCK through a merger with a blank-cheque company.
The hack changed Japanese regulation too. The rules on cold storage and segregation that now apply to every exchange in the country were written in response to it.
What Coincheck Offers
Coincheck is built around ease of use.
- Marketplace (the "sales office"). You buy or sell at a quoted price in a few taps. This service covers the full list of about thirty coins.
- Exchange. An order book where customers trade with each other. It supports bitcoin and a limited number of other coins.
- Coincheck Tsumitate. Automatic monthly or daily purchases funded from a bank account.
- Staking and lending. Customers can earn rewards on certain coins or lend assets to Coincheck for a fixed term.
- Token sales. Coincheck ran Japan's first regulated initial exchange offering in 2021 and has hosted several since.
- Extras such as an NFT marketplace and a scheme that pays utility-bill rewards in bitcoin.
The service does not offer leveraged trading. The app is consistently ranked first among crypto apps in Japan by downloads, and its design makes a first purchase very easy.
- Spot fee
- —maker / taker, base tier
- Founded
- 201215 years in 2027
- Trust score
- 6 / 10CoinGecko, live
- Proof of reserves
- —licensed or registered
The Real Cost of Using Coincheck
This is the part newcomers most often miss. The marketplace shows no commission, but the price you pay includes a spread between Coincheck's buy and sell quotes. That spread varies with market conditions and can be several percent. For small, occasional purchases it is the price of convenience. For regular or larger trades it adds up quickly.
The exchange is different. Trading bitcoin on the order book carries no maker or taker fee, and fees on other listed pairs are low. The catch is that only some coins are available there.
Other costs:
- Bank transfer deposits are free apart from your bank's charge; convenience-store and quick deposits cost a fixed fee.
- Yen withdrawals cost a flat fee of a few hundred yen.
- Crypto withdrawals carry a fee per coin, which for bitcoin varies with network conditions.
If you plan to buy bitcoin regularly, learn to use the exchange screen. If you want a coin that is offered only in the marketplace, compare the quoted price with the market price before you confirm.
Regulation and Customer Protection
Coincheck is registered with the Financial Services Agency and belongs to the Japan Virtual and Crypto Assets Exchange Association, the self-regulatory body. The legal framework requires it to:
- Hold customer crypto separately from company assets, with at least 95% in cold wallets.
- Back any customer crypto in hot wallets with its own holdings of the same asset.
- Keep customer yen in trust.
- Undergo audits of segregated assets and report regularly to the regulator.
Since the Nasdaq listing, the holding company also files audited accounts and risk disclosures in the United States. Between Japanese supervision, a regulated broker as parent and US reporting, Coincheck is now one of the more closely watched exchanges anywhere.
Security Since the Hack
There has been no repeat of 2018. Under Monex, Coincheck rebuilt its systems with cold storage and multi-signature controls and created dedicated risk and security teams. It did experience an incident in 2020, when an attacker gained access to its domain registration account and could have read some customer emails; no assets were lost, and remittances were paused while the issue was fixed.
Users should enable two-factor authentication with an app, set a withdrawal address whitelist and be alert to phishing messages, which often copy Coincheck's branding.
Who Can Open an Account?
Coincheck serves residents of Japan. You need Japanese identification and a domestic bank account, and identity verification can be completed in the app with a smartphone camera. People living abroad cannot register.
Customer support is provided in Japanese by chat and enquiry form. English help is limited, which matters for foreign residents in Japan.
Once the account is open, set up two things straight away: two-factor authentication and, if you intend to save regularly, the automatic purchase plan. Buying a fixed amount every month spreads your entry price over time and removes the temptation to guess the market. Check which screen the plan uses and what spread applies, so that you know the cost of the convenience.
Lending and Staking: Know the Difference
Coincheck's lending service asks you to hand over coins for a fixed period in exchange for an annual rate. Legally you are an unsecured lender to the company. The coins are not held in segregated custody during the term, and you cannot sell them until it ends. Staking rewards, by contrast, come from the network of the coin itself while the assets stay in your account.
Both can be reasonable, but only lending involves credit risk on the exchange. Decide how much you are comfortable lending, and remember that prices can fall sharply during a lock-up.
Tax Reminder
In Japan, profits from crypto are taxed as miscellaneous income for individuals, and swaps between coins count as disposals. Coincheck issues an annual trading report that can be used for the tax return. Keep it, along with records from any other exchange you use.
Who Is Coincheck Best For?
Coincheck is well suited to Japanese beginners who want a simple, trustworthy way to make a first purchase or set up automatic savings in bitcoin. It also suits investors who like having their crypto with a company tied to a familiar online broker.
It is less attractive for active traders and for those who want altcoins on an order book. They will pay less at exchanges where every coin trades on a book.
Coincheck Versus bitFlyer and bitbank
bitFlyer has deeper bitcoin liquidity, a professional trading platform and no history of theft. bitbank lets customers trade all listed coins on an order book and rewards makers with a rebate. Coincheck leads on simplicity, brand recognition and the range of coins available for instant purchase. Many Japanese users start with Coincheck and add a second exchange as they become more active.
Verdict on Coincheck
Coincheck turned the worst moment in its history into a reason to rebuild properly. It repaid its customers, accepted new owners and now operates under strict Japanese rules with a listed parent. Its weakness is cost: the easy marketplace is expensive compared with an order book. For a first step into crypto in Japan it is a safe and convenient choice. As your trades grow, use the exchange screen or compare prices elsewhere.