King Seiko 5621-7000 No-Date Automatic (5621-7000). Current Prices, JDM Listings, Market Analysis

The King Seiko 5621-7000 No-Date Automatic is a vintage JDM piece from Seiko's prestige King Seiko line, a range positioned above the standard Seiko catalog and aimed at the domestic Japanese market. Tonbo tracks this reference because JDM-only models like the 5621-7000 tend to surface in Japan with meaningful regularity while remaining comparatively obscure in US secondary market data, creating the kind of information gap where pricing inefficiencies appear. The current US median sits at $450, with a wide spread reflecting thin comparable data. Anyone researching the 5621-7000 price or looking to buy 5621-7000 Japan should understand what that spread means before acting.

Current US Market Value

The US median for the King Seiko 5621-7000 No-Date Automatic 5621-7000 is currently estimated at $450, with the middle 50 percent of transactions falling between $320 and $600. That is a meaningful range, and it matters that this estimate is built on a sample size of just four data points. The comp quality is rated 🟠 Estimate only, which means Tonbo has flagged this as operator-estimated rather than drawn from a deep pool of verified sales. Treat the $450 figure as a directional anchor, not a settled market price. As more transactions are recorded, that range will tighten. For now, anyone pricing a purchase or sale should weight condition heavily and treat the lower end of the range as realistic for examples with wear or incomplete paperwork.

Active JDM Listings

Japan is showing active supply right now. Four listings appeared on Yahoo Shop on June 3rd alone, spanning a wide range of asking prices and conditions. That concentration of supply on a single platform in a single day suggests either a dealer clearing inventory or coincidental market activity worth watching. Here is what the current JDM data shows for the 5621-7000 for sale in Japan.

• ¥87,780 on Yahoo Shop, condition listed as unknown
• ¥98,000 on Yahoo Shop, condition listed as excellent
• ¥99,800 on Yahoo Shop, condition listed as used
• ¥207,900 on Yahoo Shop, condition listed as unknown

Three of the four listings cluster between roughly ¥88,000 and ¥100,000, which at current exchange rates translates to approximately $580 to $660 USD before sourcing costs. The outlier at ¥207,900 is notable. Without condition details it is hard to assess, but that price point is substantially above the others and may reflect a dealer premium, a boxed set, or simply an optimistic ask. Buyers researching how to buy 5621-7000 Japan should note the clustering in the lower tier as the more representative supply picture.

Recent Alert History

No strict or opportunity alerts have fired for the King Seiko 5621-7000 No-Date Automatic in the past 90 days. This can mean a few things. It may reflect the thin comp data making it harder for Tonbo's signal engine to identify a confirmed outlier with confidence. It may also reflect a market that is currently fairly priced relative to what is available. Either way, the absence of alerts is honest information. It tells you this reference has not thrown up a clear, flagged buying window in recent months. You can track new signals as they emerge through Tonbo's signals feed.

Japan vs. US Price Gap

The JDM sourcing math on the 5621-7000 is complicated by the current listing picture. The three lower-priced Japan listings land above the US median once you add proxy fees, domestic Japan shipping, international shipping, and customs duties, which typically add $80 to $150 or more to landed cost. That means straightforward arbitrage is not obvious at current asking prices. Where opportunity can still exist is in condition variance, specifically well-preserved examples that Japanese sellers have not graded accurately, or in auction formats where final prices fall below asking levels. The main risk factor here is comp thinness. With only four US data points anchoring the valuation, a buyer who overpays has limited comparables to lean on when reselling. Condition documentation and patience matter more than usual on a reference this lightly traded. Browse recent deal patterns at Tonbo's deals tracker to see how similar JDM references have moved.

Get Real-Time Alerts for King Seiko 5621-7000 No-Date Automatic

If you want to be notified when a 5621-7000 listing fires a genuine signal, Tonbo's alert system monitors JDM platforms continuously and flags when pricing moves outside expected ranges for tracked references. Paid tiers with real-time alerts are detailed at tonbomarket.com/pricing. If you are not ready to subscribe, the free newsletter at tonbomarket.com covers notable JDM market developments on a regular cadence. Either way, given the thin comp data on this reference, having a signal rather than manually watching listings is the more reliable approach.