How to buy IOST in Japan through FSA-registered exchanges

The short answer

If you live in Japan, buy IOST on one of the four exchanges whose entry in the Financial Services Agency’s register includes IOST: Coincheck, OKJ, BitTrade and Binance Japan. Open an account with your Japanese ID, send yen from your bank, and buy on the exchange’s order book (取引所) with a limit order. That gets you the lowest cost and keeps you inside Japan’s investor-protection rules.

Japan is an odd market for IOST. It has more regulated IOST listings than any other country in Asia, the coin is on the industry association’s Green List, and IOST’s own leadership has called Japan its largest community. Yet the yen order books are thin compared with Korea’s won market. That combination shapes almost every practical decision below, from which button to press in the app to how large an order you can place without moving the price.

Law, regulator and exchange practice

It helps to separate three layers, because Japanese headlines often blur them. The law: crypto exchanges register as crypto-asset exchange service providers (暗号資産交換業者) under the Payment Services Act (資金決済法). On 15 July 2026 the Diet passed an amendment that moves crypto regulation into the Financial Instruments and Exchange Act (金商法). Crypto will be treated as a financial product distinct from securities, with new insider-trading rules, administrative fines for manipulation and rumors, and disclosure duties for issuers, exchanges and paid promoters. The new regime is expected to take effect by cabinet order within about a year of promulgation; the exact date had not been set when we checked.

The regulator: the FSA (金融庁) and the Local Finance Bureaus keep the register of exchanges and the list of assets each one handles. Exchanges must keep most customer crypto in cold wallets and customer yen in segregated trust. Self-regulation: the JVCEA (日本暗号資産等取引業協会) screens new listings and publishes a Green List of assets that are handled by at least three members, have been listed for at least six months and carry no association-imposed conditions. IOST is on it.

Exchange practice is the third layer. Each registered exchange decides on its own whether to list or delist IOST, whether to offer staking or lending, and whether to pass on an airdrop. When an exchange drops IOST, that is a commercial decision, not a regulatory verdict on the coin.

Japanese exchanges that list IOST

The FSA register shows 27 registered crypto exchanges, and only four of them list IOST. The big names many Japanese investors start with, bitFlyer, bitbank, GMO Coin and SBI VC Trade, do not. Here is how the four compare for an IOST buyer.

Two exchanges have left the list. CoinTrade (operated by Mercury) ended IOST on 8 July 2026, and the former BITPOINT system, now merged into SBI VC Trade, ended it on 5 August 2026. You will still find older Japanese articles recommending CoinTrade for IOST staking; that information is out of date. The JVCEA count of members handling IOST still meets the Green List threshold, because the four exchanges above remain, plus one custody firm that does not offer spot trading.

Liquidity is the weak spot. In our market snapshot the OKJ and Coincheck yen books together traded a small fraction of what Upbit handles in Korea, and BitTrade barely registered. For a few tens of thousands of yen this hardly matters. For larger amounts, split your order or use limit orders, and compare the yen rate against the global market with the converter at the top of this page.

販売所 vs 取引所: the button that costs you money

Japanese exchanges usually offer two ways to buy. The 販売所 (sales desk) sells you coins directly at a price the exchange sets. There is no trading fee, but the price includes a spread. The 取引所 (exchange or order book) matches you with other users, charges a small visible fee, and lets you set your own price. Beginner app flows often lead to the sales desk, so it is easy to pay the spread without noticing.

A worked example makes the gap clear. Say you buy ¥100,000 of IOST. If the sales-desk spread on that day is 3%, you pay about ¥3,000 for the convenience. On Coincheck’s order book the same purchase as a taker costs ¥100 in fees, plus whatever gap there is between the best buy and sell orders, which on a thin book can be around 1%. Even then you come out well ahead. These are illustrative figures, not a quote; spreads move with the market.

How to buy IOST in Japan, step by step

1. Pick a registered exchange

   Coincheck, OKJ, BitTrade or Binance Japan. Check the FSA register yourself if in doubt. Our Coincheck review covers fees and safety in detail.

2. Open and verify the account

   Smartphone eKYC with Japanese ID. Accounts are for Japan residents, and you need a Japanese bank account in your name for yen withdrawals.

3. Deposit yen

   A bank transfer is usually the cheapest. At Coincheck, bank deposits are free apart from your own bank’s fee, while konbini and quick deposits carry a fixed charge.

4. Buy on the order book

   Switch to the 取引所 screen for IOST/JPY and place a limit order close to the current best price.

5. Decide where to keep it

   Leave it on the exchange if you want airdrop payouts and lending, or withdraw to an L1 wallet. Exchange withdrawals use the IOST mainnet and need a memo. See how to send IOST.

IOST 3.0 airdrop payouts in Japan

When IOST moved to its 3.0 design, part of the new supply was set aside for holders. The exchange portion is based on a snapshot taken on 15 March 2025 at 09:00 JST and is paid out over four years. Japanese exchanges chose their own schedules, and the details differ in ways that matter.

Coincheck pays in eight rounds, one every six months. Rounds were paid on 30 October 2025 (after a delay from the original September date), 9 April 2026 and 15 October 2026. IOST held in your account, in a pending lending request, in a lending account or in Coincheck つみたて counts. IOST that is actually lent out (貸出中) at the time does not, and neither do accounts that are being opened, closed or are frozen. BitTrade also pays roughly every six months over eight rounds with a 1,000 IOST minimum; it paid on 19 September 2025, 25 March 2026 and 14 September 2026. OKJ supported the snapshot with a 1,000 IOST minimum that includes staked IOST, but we could not confirm its payout schedule. If you held IOST on an exchange, you do not need to claim anything; any site asking you to "connect" a wallet to receive an exchange airdrop is a scam. Our airdrop guide explains the on-chain claim for wallet holders.

This was not the first time Japanese exchanges took different lines. In September 2021 Coincheck declined to support the DON (Donnie Finance) airdrop to IOST holders, citing unconfirmed liquidity and technical safety, while OKCoin Japan supported it.

Japan, the patient market

Japanese IOST holders tend to keep coins on regulated exchanges, collect airdrop rounds and lend or stake rather than trade often. That habit is one reason exchange-level airdrop and lending rules matter more here than anywhere else.

Staking and lending at Japanese exchanges

Most Japanese holders never touch on-chain voting. Instead, exchanges offer custodial products. OKJ has offered IOST staking since January 2022, with daily rewards calculated from an estimated annual rate; a 2022 example used 8.88%. Coincheck has no IOST staking product that we could find, but its lending service (貸暗号資産) covers IOST, with terms from 14 to 365 days and rates up to 5.0% a year across assets; the IOST rate is shown only after login. BitTrade has run IOST lending campaigns, including a headline "100% a year" offer in May 2026. Treat campaign rates as one-off promotions with small caps, not as a normal yield.

Lending and staking are not the same. With lending you hand your coins to the exchange for a fixed term and carry its credit risk, and at Coincheck IOST that is lent out misses airdrop rounds. Staking at OKJ keeps the coins on the IOST network’s voting system through the exchange. If you prefer to vote yourself from a wallet, note that unvoting on the L1 has a 72-hour lock. Our staking guide compares all three approaches.

How IOST is taxed in Japan

For individuals, gains from selling or swapping crypto are generally miscellaneous income (雑所得). They are added to your salary and other income and taxed at progressive national rates of 5–45% plus 10% resident tax, so the combined top rate is about 55%. Crypto losses cannot be set against salary and cannot be carried forward. Airdropped IOST is generally treated as income when you receive it, valued at the yen price at that time, so keep the dates and amounts of every round. The National Tax Agency’s crypto FAQ, linked from Tax Answer No. 1524, is the official reference.

Change is coming but is not settled. The FIEA reform passed on 15 July 2026 sets up the legal basis for treating crypto like other financial products. Media reports on the tax reform say a separate 20% tax (20.315% with the reconstruction surtax) with a three-year loss carry-forward would apply to certain crypto traded from 1 January 2028, covering assets handled by registered firms. That is media-reported and we have not confirmed it against Ministry of Finance documents, and whether IOST qualifies will depend on the final rules. This section is general information, not tax advice; speak to a 税理士 for your situation.

Reading from outside Japan?

If you live in Japan, use Coincheck, OKJ, BitTrade or Binance Japan. Elsewhere in Asia, one route is to buy crypto with a card and move it to an exchange that lists IOST.

Start with crypto

CEX.IO does not accept residents of Japan. In Japan, buy IOST through an exchange registered with the Financial Services Agency (FSA).

Overseas exchanges and FSA warnings

Global exchanges list IOST with far deeper books than the yen markets, and Japanese social media is full of tips for using them. The FSA’s position is clear: offering crypto exchange services to Japanese residents without registration is illegal, and it has sent warning letters to Binance (twice), Bybit, MEXC, Bitget, LBank, KuCoin and others. Once the FIEA reform takes effect, sales of crypto by unregistered operators are in principle void, and unregistered business can bring prison terms. As a resident, you also lose the protections registered exchanges must give you.

CEX.IO, which we mention elsewhere on this site for card purchases of crypto, does not accept residents of Japan. Our recommendation for anyone living in Japan is simple: use an FSA-registered exchange that lists IOST. If you want the global Binance product, Binance Japan is the registered route.

Registered exchanges only!

IOST’s Japanese story

IOST’s Japanese following did not appear by accident. In 2020 few altcoins had cleared Japan’s listing process, and Coincheck’s IOST listing on 8 September 2020 was widely reported as a first. The same year, IOST won a community listing vote run by Huobi Japan (now BitTrade) with HashPort. A low unit price that lets retail buyers hold large round numbers of coins, Japanese NFT and gaming projects, and a steady stream of local partnerships did the rest. In a 2025 interview, IOST’s CEO called Japan the project’s largest community.

1. Sep 2020Coincheck lists IOSTFirst Japanese listing, trading from 8 September
2. Aug 2021RIZIN FIGHTING COLLECTION announcedNFT marketplace on IOST, licensed from the RIZIN fight promotion
3. Sep 2021OKCoin Japan lists IOSTSecond domestic listing, spot trading from 15 September
4. Oct 2021Japan Blockchain AssociationIOST joins as a full member
5. Nov 2021OKCoin Japan partner nodePartnership signed; the exchange joins the network as a partner node
6. Jan 2022OKJ staking, RIZIN NFTs shownStaking launches; RIZIN collection displayed at NFT WEEKS TOKYO
7. 2025Airdrop supportJapanese exchanges back the IOST 3.0 snapshot of 15 March
8. Jul–Aug 2026Two delistingsCoinTrade and the former BITPOINT system drop IOST

The community is still active offline, with events in Tokyo alongside OKJ and BitTrade. The verified Japanese account on X is @IOSToken_jp; treat look-alike handles with suspicion. Japan also produces its share of rumors. We found no evidence of IOST partnerships with Sony, Nintendo or other big brands that circulate online, no token called "RIZIN FIGHTING COIN", and no source tying any named Japanese fighter to IOST. Event sponsorships in 2026 are not corporate partnerships either. Our NFT and partnerships guide checks each claim.

For the wider regional picture, including Korea’s much deeper won market, see our IOST in Asia hub and the South Korea guide.