The reviewed snapshot includes 43 active pairs, 43 tradable assets, 43 ticker observations. The ten leading pairs represented about 99.0% of measured volume; ETH/JPY was the largest observed pair at about 47.1%; median spread across leading markets was 0.16%. Counts and shares depend on available tickers and may not cover every product or jurisdiction.
Evaluate executable depth, fees, deposits and withdrawals, custody, account protections, and local eligibility. Reported volume alone does not show how a larger order will execute. Spread, depth, and concentration should be assessed for the exact pair and size.
Custody, withdrawal access, counterparty solvency, resilience, account security, jurisdiction, and listing standards are material for centralized venues. Trust Rank is not proof of reserves or a guarantee. Terms and regulatory availability can change, so confirm current rules directly with the venue.
OKJ in Japan: A Centralized Market with Concentrated Trading Activity
OKJ is recorded as a Japan-based centralized exchange launched in 2017. Its observed market offers 43 assets and pairs, while trading is heavily concentrated in ETH/JPY and the ten largest pairs.
OKJ’s recorded role as a Japan-based centralized exchange
OKJ, identified by the exchange ID okcoin-japan, is recorded as a centralized venue in Japan with a 2017 foundation or launch year. A centralized structure generally means the venue operates the trading system and presents the market through an exchange-controlled interface, rather than relying on a permissionless protocol for matching and settlement. That operating model makes the venue’s own policies, systems, and handling arrangements relevant to any assessment of how trading works.
The company describes itself as the Japanese corporation of OK Group and says it operates as a registered cryptocurrency exchange business under Japanese laws and regulations. Those are statements made by the company rather than independent findings in this profile. The description also says the business uses group technology, products, and accumulated expertise while targeting Japan’s Web3 and crypto-asset sector. The scope and practical effect of those claims require confirmation from current official records and venue documentation.
OKJ’s observed market coverage reaches 43 pairs and assets
The recorded snapshot contains 43 pairs, 43 assets, and 43 ticker records. That one-to-one count suggests the observed list was relatively compact: each listed asset appears to have been represented in one recorded pair in the snapshot. It does not establish the full historical product range, the availability of deposits or withdrawals for every asset, or the jurisdictions in which particular markets can be accessed.
ETH/JPY was the leading observed pair, accounting for 47.08% of reported market share. This provides a clear indication of where activity was concentrated at the time of measurement, but it does not by itself explain whether the activity came from recurring customer demand, a short-lived market event, or venue-specific trading conditions. Readers comparing OKJ with other venues should examine the same measurement window and methodology.
Pair concentration makes OKJ’s market breadth narrower in practice
The ten largest pairs represented 99.04% of observed share. Although 43 pairs were listed, this distribution means the effective market center was much smaller than the headline pair count. ETH/JPY alone represented almost half of the observed share, leaving the remaining markets to account for the other 52.92%. A broad listing count therefore should not be read as evenly distributed liquidity.
The median spread among the top 20 pairs was 0.164%. Spread is a point-in-time measure of the gap between quoted buy and sell prices, not a guarantee that an order of a particular size would execute at those quotes. The result gives some context for displayed market quality, but it does not capture slippage, order-book depth, market impact, execution speed, or conditions during sharp price movements.
OKJ’s recorded volume history shows large variation
Thirty volume observations were recorded, with the series rising 114.52% from its first observation to its latest. Reported median volume was 126.0153 BTC, while the minimum was 24.4255 BTC and the maximum was 1,686.0004 BTC. The gap between the minimum and maximum shows that activity varied substantially across the observation period.
These figures describe reported market activity, not a finding about the quality or authenticity of that activity. They also do not reveal which pairs generated the volume, how much was concentrated in ETH/JPY, or whether the highest reading reflected a temporary event. A fuller comparison would need timestamps, pair-level volume, order-book depth, and a consistent method for checking reported figures.
What the centralized structure leaves to verify
Because OKJ is recorded as centralized, practical questions extend beyond the visible pair list and spread statistics. The available facts do not describe custody arrangements, segregation of customer assets, withdrawal procedures, key-management controls, incident history, or the treatment of assets during outages or disputes. They also do not establish reserve practices, audit coverage, insurance, or solvency.
The company’s stated Japanese registration and compliance position should be checked against the current regulator-facing record, including the exact legal entity and activities covered. Other points requiring direct confirmation include account eligibility, asset and fiat support, fee schedules, settlement timing, withdrawal limits, market availability, and the terms governing suspended or delisted assets. The recorded Trust Rank of 59 is a comparison label, not evidence that the venue is safe, solvent, or suitable for any particular user.
How to read OKJ’s observed liquidity without overstating it
OKJ’s snapshot presents a focused Japanese market rather than evenly distributed activity across 43 pairs. ETH/JPY’s 47.08% share and the top-ten concentration of 99.04% are the most consequential structural observations. The 0.164% median spread among the top 20 pairs adds useful quote-level context, but it should be paired with tests of executable size and depth before drawing conclusions about trading conditions.
The volume series adds a second qualification: activity was not constant, moving from 24.4255 BTC at its lowest recorded point to 1,686.0004 BTC at its highest. Taken together, the figures support a profile of concentrated and variable observed activity. They do not independently answer whether the venue’s operational, legal, custody, or financial arrangements meet a reader’s requirements.
Key takeaways
- OKJ is recorded as a centralized Japanese exchange launched in 2017.
- The observed market contained 43 pairs and 43 assets, with ETH/JPY leading at 47.08% of reported share.
- The ten largest pairs accounted for 99.04% of observed share, indicating strong concentration despite the 43-pair count.
- The median spread across the top 20 pairs was 0.164%, but spread alone does not measure executable depth or slippage.
- Thirty volume observations ranged from 24.4255 BTC to 1,686.0004 BTC, with a 114.52% first-to-latest increase.
- The company’s regulatory and group-affiliation statements require verification and should not be treated as independent safety findings.
Risks and unresolved questions
- The observed market is highly concentrated in ETH/JPY and a small group of leading pairs.
- Reported volume varies widely, and the available figures do not show pair-level composition or how activity was generated.
- public materials does not describe custody, asset segregation, reserves, audits, insurance, security controls, or solvency.
- The snapshot does not establish order-book depth, slippage, execution quality, or spread behavior during stressed markets.
- The exact legal entity, current registration status, covered activities, access conditions, fees, withdrawals, and supported jurisdictions require confirmation.
