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OKCoin Japan K.K. (OKJ) — Japan crypto-asset exchange operator overview

Confidence: Likely Updated 2026-05-18 Review by 2026-08-08 Sources 7 Machine-translated Original (JA)
#fintech#jp-crypto-exchange#vasp
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This entry sits under exchanges index. Read it with FSA crypto-asset exchange business registration system: numbering, local-finance-bureau jurisdiction, and registration requirements for adjacent context and Japan financial regulation: legal framework for tokens, crypto-assets, and payments for the broader system boundary.

FSA registration number Kanto Local Finance Bureau No. 00020 · JVCEA member #1023 · registration date 2020-03-30

1. Corporate entity / shareholders

  • Trade name: OKCoin Japan K.K. (オーケーコイン・ジャパン株式会社)
  • English name: OKCoin Japan K.K.
  • Corporate number: 8030001122337
  • Established: 2017-09-19
  • Head office: 〒105-0001 5F, 1-2-10 Toranomon, Minato-ku, Tokyo
  • Parent company: the OKX (formerly OKEx / OKEx Holdings Limited) group. Established as the Japan local entity of the global entity OKX (registered in Seychelles, holding Okcoin International Ltd. and others). The shareholding ratio / intermediate-holding-company structure is not disclosed.
  • Listing status: unlisted (the parent OKX, as a group as a whole, is also unlisted)
  • Note: the service brand was refreshed from the former name “OKCoinJapan” (service started 2020-08-20) to “OKJ” on 2024-08-20 (simultaneously with the 4th anniversary of the service launch). The trade name / FSA registered name remains OKCoin Japan K.K., unchanged.

2. Licenses / registration status

  • Crypto-asset exchange business: Director-General of the Kanto Local Finance Bureau No. 00020 (registration date 2020-03-30)
  • JVCEA member type: Type I member #1023 (crypto-asset exchange business only)
  • Financial instruments business: not obtained (no derivatives trading)
  • Electronic-payment-instruments trading business: not obtained
  • Funds-transfer business: not obtained

3. Listed currencies

  • Number of listings (as of 2026-05): sales outlet 49 listings / exchange (order-book trading) roughly the same scale
  • Major listings: BTC, ETH, XRP, SOL, ADA, DOT, DOGE, AVAX, LTC, BCH, LINK, DAI, SHIB, PEPE, TON, TRX, TRUMP, SUI, etc.
  • Notable listings: OKB (OKX ecosystem native token), FNCT (Financie token), OAS (Oasys), PLT (Palette), DEP (Digital Entertainment Asset) — relatively many domestic Japanese / Asian project listings
  • Distinctive features: also actively adopts altcoins / emerging-chain tokens (KAIA, ASTR, IOTX, etc.). Compared with the several hundred listings that global OKX handles worldwide, the Japan offering is substantially limited (due to the FSA review process).

4. Scope of business

  • Spot exchange (order-book trading): yes. Maker/Taker fee structure (Lv1: Maker 0.07% / Taker 0.14%; Lv7 with monthly trading volume above JPY 3 billion is by negotiation)
  • Sales outlet (OTC dealer): yes. No fee on all listings (spread-inclusive)
  • Derivatives (futures / margin trading): none
  • Staking: yes. 12 eligible listings (SOL, TRX, SEI, ADA, APT, ASTR, AVAX, ETH, IOST, QTUM, SUI, XTZ). Flexible / fixed-term plans available. All assets cold-wallet managed
  • Crypto lending: yes
  • Flash Deals (timed sale purchase): yes
  • Auto-accumulation (regular purchase): yes
  • Large-lot OTC service: yes (for corporate / large lots, BTC and ETH, etc.). Added ETH in 2026-04, added a sell-order function in 2026-05
  • Corporate Premier service: yes (“OKJ Corporate Premier”, started 2025-04-10)
  • NFT: none
  • Fiat-currency deposit channel: bank transfer only (via GMO Aozora Net Bank 24/365, no fee. Convenience-store deposit / quick deposit not supported)
  • Withdrawal limit: crypto-asset withdrawal cap of JPY 300 million equivalent per day

5. Market share / trading volume

  • Trading volume / account count: not disclosed
  • Customer base: mainly retail (individual) centered. Through the corporate Premier service, it has also begun addressing institutional investors / the corporate layer
  • Competitive position: a mid-tier player among the 26 JVCEA member companies. Compared with the major market makers (bitFlyer / Coincheck / SBI VC Trade, etc.) it is considered smaller in scale, but its number of listings ranks in the upper domestic class. Account count / trading volume not disclosed. For the geographic distribution of VASP parent companies, see JP VASP parent-company map.

6. History / major events

Year/MonthItem
2017-09OKCoin Japan K.K. established
2020-03Obtained FSA crypto-asset exchange business registration (Kanto Local Finance Bureau No. 00020)
2020-08Began providing the crypto-asset trading service “OKCoinJapan”
2022-07Began AVAX (Avalanche) order-book trading. The same year, altcoins such as SHIB (2023-02) were listed one after another
2023-05Began publishing the “OKJ BTC Index” (transparency of the mid price)
2023-05Began the eKYC service (account opening in as little as 5 minutes)
2024-08Refreshed the service brand from “OKCoinJapan” to “OKJ” (4th anniversary; no trade-name change)
2025-01Concluded a partnership with Kaia (formerly Klaytn) (promoting Line Mini Dapp usage)
2025-04Began providing the “OKJ Corporate Premier” service for large-lot corporates
2026-04Added ETH to large-lot OTC, subsequently added a sell-order function
2026-05Began handling BERA (Berachain)
  • Administrative disposition history: none confirmed within the scope of public materials (continued confirmation required)
  • Hacks / system failures: no major incidents disclosed (continued confirmation required)
  • Parent company OKX’s regulatory risk: global OKX and Aux Cayman Islands Ltd. (formerly Okcoin International Ltd.) agreed to a settlement with the U.S. FinCEN, CFTC, and DOJ in 2024 (penalties exceeding USD 160 million). Although not a direct disposition of the Japan entity, it warrants attention as group credit risk.

7. Strategic developments

  • Direct blockchain delegation: in 2026-05, in conjunction with a collaboration with Dawn Labs (Solana-related), conducted delegation to a Solana validator node. Deepening involvement in PoS infrastructure
  • OKJ Academy (education): announced launch as of 2026-05. A retail-customer-cultivation line
  • Kaia strategic integration: as differentiation from Line BITMAX, expanding touchpoints to the LINE economic sphere (Kaia chain)
  • Active adoption of multiple / emerging listings: from public information, one can read a posture of treating listing expansion ahead of peers (domestic / Web3 gaming-type tokens, etc.) as a growth driver
  • Representative Director: Zhongyang Feng — listed on the official company-overview page (retrieved 2026-05). Details of his career are not disclosed
  • Major shareholders: not disclosed. The group parent is of the OKX (Seychelles) lineage
  • Founder story: not disclosed

Sources