BTCBOX

口座開設の手順

How to open an account

Source: official guide ↗

1. 1

   Check the conditions and the sending limits

   Before applying, check the age and residence conditions, and that for now crypto can only be sent to supported Japanese exchanges. The Speedy ID check needs a smartphone.

   1. You can apply in your own name at 18–74; people aged 75 or over can't open an account.
   2. Under 18, the account is a minor's account traded by a parent. The minor must live with the parent and needs the parental consent form, the parent's ID, a residence record showing the relationship and more; only the postcard ID route is available.
   3. For now, crypto can only be sent to Japanese exchanges that can receive a Travel Rule notice. If you want to send to your own wallet or an overseas exchange, choose another exchange.
   4. If your destination is an exchange that isn't on the official list, such as bitFlyer, Coincheck or Binance Japan, BTCBOX can't send to it.
   5. The Speedy ID check (as soon as the same day) is for adults living in Japan and uses a smartphone to photograph your ID and face. Have a driver's licence, My Number card, residence card or driving history certificate ready.
   6. You also need an email address (not a mobile-carrier one), your own mobile number for SMS, a phone for Google Authenticator, and a device with a screen lock or biometrics for the passkey.

   Tip IDs showing an old address aren't accepted. If you've moved, update the address on your ID first.

   Source: official guide ↗
2. 2

   Register your email and agree to the terms

   On the official site, press 「新規登録」, register your email and a login password, and agree to the terms. Opening the link in the email completes provisional registration.

   1. Open the official site in a PC or phone browser and press 「新規登録」 (or 「無料登録」). In the app, go to 「財産」 → 「新規登録」 (app sign-ups are only for adults living in Japan).
   2. Enter your email and a login password. In the app, also type the 4-character code shown in the image.
   3. Open 「利用規約」, read it to the end, choose 「同意します」 and press 「新規登録」. In the app, you then set a trading password (取引パスワード).
   4. Open 「アクティブにする」 or the URL in the confirmation email from BTCBOX. If it hasn't arrived, check your spam folder.
   5. At this point you're only provisionally registered and can't trade yet.

   Tip BTCBOX never asks for passwords or codes, or asks you to move money, by email, phone or social media. Log in through a bookmark to the official site.

   Source: official guide ↗
3. 3

   Turn on Google 2-step verification

   When you log in, the 2-step verification screen appears. Scan the QR code on screen with Google Authenticator on your phone and enter the 6-digit code it shows.

   1. Log in with your email and login password; you'll also be asked for a code sent to your email.
   2. Install Google Authenticator, tap 「＋」 at the bottom right, choose 「QRコードをスキャン」 and scan the QR code on screen (or choose 「セットアップキーを入力」 and paste the secret key).
   3. Enter the 6-digit code from the app and press 「確認」; when 「Google２段階認証が有効です」 appears, you're done.
   4. Keeping the QR code or secret key somewhere safe lets you restore 2-step verification after changing phones or deleting the app. Keep it private.

   Tip If the code is rejected, check that your phone's clock is correct (set to automatic).

   Source: official guide ↗
4. 4

   Create a passkey

   Next, register a passkey: a way of logging in with your device's fingerprint, face or screen lock. BTCBOX requires one.

   1. Press 「パスキーを作成」 and choose 「この端末で登録／QRをスキャンして登録」. To register it on another device, use 「別の端末に登録用メールを送信」.
   2. Choose where to save it (iCloud Keychain, Google Password Manager, a password manager app and so on). Chrome may ask for your 6-digit Google Password Manager recovery PIN.
   3. When 「パスキーの追加に成功しました」 appears, it's done. From then on you log in with the passkey; password logins stop working.
   4. Each device needs its own passkey (up to 10). iPhones need Face ID, Touch ID or a passcode plus iCloud Keychain; Android needs a screen lock; Windows needs Windows Hello.
   5. For 24 hours after you first register, add or delete a passkey, crypto sends and yen withdrawals are blocked.

   Tip Passkeys don't work in private browsing. If it fails, try the latest version of Chrome.

   Source: official guide ↗
5. 5

   Verify your mobile number by SMS

   Under 「携帯sms認証の設定」, enter your mobile number and type the 4-digit code sent by SMS.

   1. Enter your mobile number, press 「コード取得」, then type the 4-character code shown on screen and press 「OK」.
   2. Type the 4-digit number from the SMS and press 「次へ」.
   3. Only your own mobile number can be registered (a parent's number is allowed for a minor's account).
   4. If no SMS arrives, check that your phone accepts SMS from overseas senders.

   Tip This number is also used when you register send addresses or reset your trading password.

   Source: official guide ↗
6. 6

   Enter your details and answer the questions

   Choose 「日本在住の方」 and enter your name, address, date of birth, payout bank account, occupation and so on. Agree to the three documents, check everything and continue.

   1. Enter your name exactly as on your ID (old kanji forms included) in kanji, katakana and romaji (first name, then surname). Separate any middle name with spaces, as on official documents.
   2. Enter your full address, down to the block number, building name and room number. It must match the address on your ID.
   3. Enter your gender, nationality, whether you're a foreign PEP, your date of birth, and a payout bank account in your own name. A date of birth under 18 brings up the parental consent form.
   4. Choose your occupation and income, purpose of trading, financial assets, investment experience and how you found BTCBOX. Enter an invitation code only if you have one. You also declare your tax residence country.
   5. Open and read 「利用規約」, 「反社会的勢力」 and 「契約締結前交付書面」, press 「同意する」 on each to tick it, then press 「次へ」 and 「確認した、次へ」.
   6. See "Application questions explained" below for what each question means, and answer everything truthfully.

   Tip Make your name match both your ID and the bank account you'll use; if the names differ, deposits aren't credited and withdrawals fail.

   Source: official guide ↗
7. 7

   Speedy ID check: photograph your ID and your face

   Choose 「スピーディー本人確認」 as your ID method and scan the QR code shown with your phone. Photograph your ID from three angles, then choose 「自撮り撮影で確認」 and take a selfie to finish.

   1. Only adults living in Japan can use the Speedy ID check. If you're applying on your phone, save the QR code screen as a screenshot and open it with a QR reader app.
   2. Read the notes, press 「上記に同意して本人確認をはじめる」 and choose your document (driver's licence, My Number card, residence card or driving history certificate). Foreign nationals use the residence card.
   3. Photograph the front, an angled view and the back, lined up with the frame (it shoots automatically and switches to manual if needed). Press 「撮影し直す」 if a shot is blurred, has glare or is cut off.
   4. Choose 「自撮り撮影で確認」 and take a photo with your face in the frame. Each capture must be finished within 2 minutes.
   5. Use a bright place, put the ID on a non-white background, and don't let sunglasses or hair hide your face.

   Tip After the ID photos you can choose 「転送不要郵便で確認」 instead, but then you must wait for a postcard, which takes longer.

   Source: official guide ↗
8. 8

   Or verify by postcard

   Without a smartphone, or for a minor, choose 「郵便ハガキで本人確認」 and upload photos of two documents. Enter the 6-digit code from the postcard that arrives after review to finish.

   1. Go to 「郵便ハガキで本人確認へ」 → 「本人確認書類アップロード画面へ」 and upload two different kinds of document as 「本人確認書類①」 and 「本人確認書類②」.
   2. Accepted documents include a driver's licence, My Number card (front only), Japanese passport, and a residence record or seal registration certificate issued within 3 months. If you can't provide two, use one photo ID plus a utility receipt from the last 3 months.
   3. Only camera photos of the originals are accepted: no copies or scans, no glare, all four corners visible. Foreign nationals must include a residence card or special permanent resident certificate.
   4. Passports applied for or issued from 4 Feb 2020 have no address field, so the other document must show your current address.
   5. After review, a postcard with a 6-digit number is sent by registered mail to the address on your ID within the next business day (delivery takes a few days). It can't be received anywhere else.
   6. When it arrives, log in, go to 「設定」 → 「本人確認」 → 「ワンタイムパスワード入力へ」, enter the code and complete the slider check; the account is then open.

   Tip Minors also upload the parent's ID, the parental consent form (don't forget the date) and a residence record for the whole household showing relationships. BTCBOX phones the parent after review.

   Source: official guide ↗
9. 9

   Review, then your account opens

   Applications are normally reviewed within 1–2 business days; with the Speedy ID check the result can be emailed as soon as the same day. Once approved, you can start trading.

   1. If something's wrong with your documents, you'll be asked by email to resubmit, which slows the review.
   2. Depending on the review, it can take longer or the application can be declined.
   3. If you hear nothing and the review doesn't finish, contact BTCBOX through the enquiry form.
   4. Once the account is open, you can also log in and trade in the iPhone and Android apps (each device needs its own passkey).

   Tip Enquiries are handled on weekdays 10:00–17:30.

   Source: official guide ↗
10. 10

    Deposit yen and buy

    Deposit yen from 「財産センター」 by bank transfer or instant deposit, then buy on かんたん売買 or the order book.

    1. Bank transfer: choose the receiving bank (docomo SMTB Net Bank, formerly SBI Sumishin Net Bank, or AEON Bank) and the amount, and the account details appear. Transfer from an account in your own name, putting the ID shown in front of your name as the sender (in the form 【UID-振込回数 口座名義】).
    2. If you forget the ID or the name differs, the deposit isn't credited. Transfers are credited the same day during weekday business hours, otherwise the next business day.
    3. Instant deposits: docomo SMTB Net Bank (free, credited 24/7), plus convenience stores and Pay-easy (¥1,000 each). Assets equal to a convenience-store or Pay-easy deposit can't be withdrawn or sent for 7 days.
    4. かんたん売買: enter a quantity or approximate yen amount, press 「買う」 and press 「確定」 on the confirmation screen within 6 seconds (BTC, ETH, DOGE, DOT, TRX; no fee, but there's a spread).
    5. Order book: trade BTC, BCH, ETH and LTC with limit orders. For now there are no market orders, and prices more than ±5% from the market aren't accepted. Fees: 0.05% for BTC, 0.10% for the others.

    Tip You can also set up recurring BTC purchases (あんしん定期購入); setting them up needs passkey authentication.

    Source: official guide ↗
11. 11

    Sending crypto out: only to a supported Japanese exchange

    For now you can only send to Japanese exchanges that can receive a Travel Rule notice. Register the destination address first, then request the send under 「暗号資産出金」 and confirm with your passkey.

    1. Check that the receiving exchange is on the official list (the article 「トラベルルール対応に伴う暗号資産の入出庫について」) and accepts deposits of that coin on that network.
    2. In 「財産センター」 → 「暗号資産出金」, choose the coin and press 「アドレスを追加」. Enter the address, a label, the destination's name, the recipient's details, and whether the transfer relates to Iran, North Korea, Russia or Belarus.
    3. Confirm with an SMS code, your trading password and a Google 2-step code.
    4. Under 「暗号資産出金」, enter the coin, destination address, amount and purpose, check the details and authenticate with your passkey to submit.
    5. Sends are processed by hand: requests on weekdays 9:00–17:30 go out within 24 hours, others by the next business day. Crypto sent to a wrong address or network may be lost for good.

    Tip Sends to your own wallet or to overseas exchanges aren't possible at present (no restart date). If you move the coins on from the receiving exchange, that exchange's own rules apply.

    Source: official guide ↗

申込フォームの質問と答え方

Application questions explained

What each question means and how to answer it accurately. Always answer truthfully. Answers that don't match reality lead to rejection or a frozen account.

スムーズに開設するコツ

Tips for a smooth signup

• Unless your coins are going to another Japanese exchange, BTCBOX isn't a good fit. For now you can't send to your own wallet (MetaMask, a hardware wallet and so on) or to overseas exchanges, and no restart date has been set. If you want coins in your own wallet, choose an exchange that allows it.
• Before sending, check that the receiving exchange is on the official list; bitFlyer, Coincheck and Binance Japan aren't (list updated 1 Sep 2026).
• Adding or deleting a passkey blocks sends and withdrawals for 24 hours, so don't change passkeys just before you plan to withdraw.
• Register passkeys on two or more devices (up to 10) so you can still log in if you change or lose a phone.
• Market orders aren't available on the order book for now. To buy straight away, use かんたん売買 and mind the spread built into its prices.
• BTCBOX warns that being told to open an account, buy crypto or send it to a given address (a reward just for opening an account, sending to "protect" your assets and so on) may be fraud. If anything feels off, stop and talk to the police.
• People aged 75 or over can't open an account; consider exchanges with no upper age limit, such as bitFlyer, bitbank or GMO Coin.