OKJ (Formerly OKCoin Japan) Registration and Usage Guide

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Cryptocurrency trading platforms continue to evolve, offering users more secure, efficient, and feature-rich experiences. Among these, OKJ (OKCoin Japan) stands out as a trusted choice for Japanese investors seeking a regulated and powerful exchange. Operated by the Japanese subsidiary of OKGroup—the same company behind the globally recognized OKX—OKJ combines international expertise with local compliance.

This comprehensive guide walks you through everything you need to know about OKJ: from its key features and registration process to practical usage tips and frequently asked questions. Whether you're new to crypto or looking to expand your trading options, this article ensures a smooth onboarding experience.

What Is OKJ? Key Features Explained

OKJ, formerly known as OKCoin Japan, is the Japanese arm of OKGroup, a major player in the global cryptocurrency ecosystem. Registered with Japan’s Financial Services Agency (FSA) under license number 00020, OKJ offers a secure and compliant environment for buying, selling, and managing digital assets.

Here are the standout features that make OKJ a compelling option:

Backed by OKGroup – A Global Crypto Leader

OKJ operates under the technological and operational umbrella of OKGroup, the force behind OKX, one of the world’s top cryptocurrency exchanges by trading volume. According to CoinMarketCap, OKX ranked 9th globally in spot trading volume and 2nd in derivatives trading as of early 2025.

This global infrastructure enables OKJ to offer high liquidity, fast transaction processing, and robust security—leveraging years of blockchain innovation and enterprise-grade risk management.

👉 Discover how a globally trusted platform can enhance your trading strategy today.

Trade OKB – The Native Utility Token of OKX

One unique advantage of using OKJ is the ability to buy and sell OKB, the native utility token issued by OKX. Originally launched on the Ethereum blockchain, OKB has a fixed supply of 300 million tokens and plays a vital role across the OKX ecosystem.

Holders use OKB for:

With minimal spreads on both the spot market (sales desk) and exchange trading, OKJ serves as an ideal entry point for users looking to acquire OKB while staying within Japan’s regulated framework.

High Liquidity and Fast Execution Through Global Integration

Thanks to its integration with OKGroup’s global order book, OKJ benefits from deep market depth and high liquidity. This means faster trade execution and tighter bid-ask spreads—even during volatile market conditions.

Additionally, OKJ supports 24/7 deposits and withdrawals in both JPY and multiple cryptocurrencies. The platform also maintains 100% cold wallet storage for customer funds and employs round-the-clock system monitoring to defend against cyber threats.

Step-by-Step Guide to Registering on OKJ

Creating an account on OKJ is straightforward but requires strict identity verification to comply with Japanese financial regulations. Below is a clear breakdown of the registration process.

1. Create an Account with Email and Password

Start by visiting the official OKJ website and clicking "Account Registration" in the top-right corner.

Enter your:

You’ll receive a verification code via email—input it to proceed. Your basic account is now created.

2. Register Your Mobile Phone Number

Next, verify your mobile number:

Repeat email verification at this stage for added security.

3. Provide Personal Information

Fill in your full legal name, gender, date of birth, and current residential address. Ensure this matches exactly with your official identification documents, as discrepancies may delay verification.

Also complete fields for:

✅ Tip: Use your actual living address—this is where OKJ will send a physical confirmation letter.

4. Complete Identity Verification

Submit two valid forms of identification:

Primary ID (choose one):

Secondary ID (choose one):

Upload clear images or scans of both documents. Then confirm your investment objectives and trading experience before submitting.

Once submitted, your application enters review status. Approval typically takes up to two business days.

5. Confirm via Postcard Verification Code

After approval, OKJ sends a confirmation postcard to your registered address. This contains a unique authentication code required to finalize registration.

To enter the code:

  1. Log into your account
  2. Navigate to Profile > Address Verification
  3. Input the code from the postcard

Upon successful entry, your account is fully activated.

Bonus Tip: Strengthen Security with Two-Factor Authentication (2FA)

While SMS-based 2FA is enabled by default, upgrading to Google Authenticator significantly enhances account protection.

Steps:

  1. Download Google Authenticator
  2. Go to Security Settings > Enable Google Authenticator
  3. Scan the QR code or manually enter the key
  4. Enter the generated code and confirm

This step helps prevent unauthorized access even if your phone number is compromised.

How to Use OKJ: Core Functions Explained

Once registered, you can begin trading immediately after depositing JPY via bank transfer. Funds reflect instantly in your deposit account—just remember to transfer them to your trading account before placing orders.

Let’s explore the main functionalities:

Buy/Sell Crypto on the Sales Desk (Spot Market)

The sales desk offers a simple way to trade major cryptocurrencies like BTC, ETH, XRP, and ADA at real-time prices.

Process:

  1. Choose currency (e.g., Bitcoin)
  2. Click “Buy” or “Sell”
  3. Enter amount
  4. Confirm transaction

While advertised as zero-fee, trades include a small built-in spread—typically less than ¥1 for BTC due to strong liquidity.

👉 Start trading with confidence on a platform built for speed and security.

Trade on the Exchange (Order Book Trading)

For advanced users, OKJ offers order book trading in both JPY and BTC pairs. This allows precise control over pricing through various order types:

The interface displays charts, order books, and trade history side-by-side for informed decision-making.

Earn Passive Income Through Staking

Hold select cryptocurrencies and earn daily rewards via staking.

Available assets include IOST, PLT, DOT, and others. For example:

Simply click “Apply,” choose amount and duration, then confirm.

Maximize Returns with Flash Deals

Occasionally, OKJ runs limited-time promotions called Flash Deals, offering exceptionally high staking yields—such as 88.88% APY on PLT tokens.

These events are not permanent, so monitor your dashboard regularly to seize these high-reward opportunities when available.

Frequently Asked Questions About OKJ

Is there a sign-up promotion or welcome bonus?

Currently, there is no direct sign-up bonus for opening an OKJ account. However, they offer a referral program:

How long does the registration review take?

The initial review takes up to 2 business days. After approval, allow several additional days for the verification postcard to arrive by mail. Plan for about one week total from signup to full activation.

How fast are deposits and withdrawals?

All operations are supported 24/7, though rare delays may occur during maintenance windows.

I deposited money but can’t trade—what should I do?

This usually means funds are still in your deposit account. To trade:

  1. Go to Wallet > Transfer
  2. Move funds from "Deposit Account" to "Trading Account"
  3. No fees or delays—transfer is instant

Can I register if my ID address differs from my current residence?

No. OKJ requires your registered address to match your official ID exactly because they send a non-forwardable verification postcard. If you’ve recently moved or are temporarily relocated (e.g., work assignment), update your address first or wait until you can receive mail at the registered location.

Final Thoughts: Why Choose OKJ?

OKJ delivers a powerful blend of regulatory compliance, advanced trading tools, and seamless access to global markets—all tailored for Japanese users. From low-spread trading and staking opportunities to earning rewards via Flash Deals, it's designed for both beginners and experienced investors.

While the registration process involves extra steps like postal verification, these measures ensure top-tier security and trustworthiness—a worthwhile trade-off for long-term peace of mind.

Whether you're aiming to diversify your portfolio or gain exposure to exclusive tokens like OKB, OKJ provides a reliable gateway into the future of finance.

👉 Take control of your crypto journey with a platform trusted worldwide.