FinWikiPublic-source finance field guide
日EN

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

ConfidenceLikelyUpdated2026-07-29Review by2027-01-29Sources7Machine-translatedOriginal (JA)

On this page

Wiki route

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
  • Group relationship: Established as the Japanese local entity of the OKX group (formerly OKEx).
  • 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

  • Supported assets: The official product pages retrieved on 2026-05-18 showed major assets including BTC, ETH, XRP, and SOL, as well as OKB, FNCT, OAS, PLT, and DEP. Availability changes, so this entry does not fix a total or domestic rank; use the live product pages.

4. Scope of business

The following is a snapshot of service categories confirmed on OKJ’s official product, fee, and deposit/withdrawal pages retrieved on 2026-05-18. Availability, pricing, eligible assets, funding methods, and limits can change, so the current official pages take precedence. ^[Sources: https://www.okcoin.jp/pages/products/fees.html; https://www.okcoin.jp/pages/products/staking.html; https://www.okcoin.jp/pages/products/deposit-withdraw.html.]

  • Trading and asset-use categories: exchange, sales outlet, staking, crypto lending, Flash Deals, and recurring purchases
  • Corporate and large-lot categories: large-lot OTC service and OKJ Corporate Premier
  • Fees and funding conditions: this entry does not copy fixed values or unsupported-item claims; check the current official fee and deposit/withdrawal pages

5. Market share / trading volume

  • The OKJ corporate and product materials reviewed on 2026-07-29 contain no comparable trading-volume or account-count figures. This entry does not infer a domestic rank or scale. Corporate-service availability is treated as a documented service category in §4.

6. History / major events

The table below is limited to milestones whose dates can be confirmed in the company profile, the FSA register, and OKJ’s official notices. Current availability of individual assets should be checked on the company’s live product pages rather than inferred from this history. ^[Sources: https://www.okcoin.jp/pages/company/about.html; https://www.fsa.go.jp/menkyo/menkyoj/kasoutuka.xlsx; https://support.okcoin.jp/hc/ja/categories/360002138653.]

Year/Month Item
September 19, 2017 OKCoin Japan K.K. established
2020-03 Obtained FSA crypto-asset exchange business registration (Kanto Local Finance Bureau No. 00020)
2020-08 Began providing the crypto-asset trading service “OKCoinJapan”
2024-08 Refreshed the service brand from “OKCoinJapan” to “OKJ” (4th anniversary; no trade-name change)
2025-04 Began providing the “OKJ Corporate Premier” service for large-lot corporates
  • Scope of the administrative-action and major-event review: Within the company profile, FSA register, and OKJ official notices reviewed above, this review did not identify a statement showing an administrative action, hack, or major system outage. This is not an assertion that no such event exists.
  • U.S. criminal proceeding involving an affiliated group entity: On February 24, 2025, Seychelles-based Aux Cayes Fintech Co. Ltd., the operator of OKX, pleaded guilty to operating an unlicensed money-transmitting business in the United States and agreed to pay more than USD 504 million in total. The U.S. Department of Justice materials attribute the charged conduct to Aux Cayes, so this is not presented as a direct action against the Japanese entity. ^[Source: https://www.justice.gov/usao-sdny/pr/okx-pleads-guilty-violating-us-anti-money-laundering-laws-and-agrees-pay-penalties.]

7. Strategic developments

  • Product and partnership developments: Update only matters supported by an OKJ official notice with a confirmed date and content; individual initiatives are not used to infer a PoS strategy, customer strategy, or differentiation from peers.
  • Representative Director: Zhongyang Feng — listed on the official company-overview page retrieved in 2026-05.

Sources

#fintech#jp-crypto-exchange#vasp

Discovery

Keep reading

Related

Read next

Links here