🇯🇵 Japan
Pacific Ocean · Naval Base
Voyages from Yokosuka in Japan cross the world's largest ocean basin, where route optimisation and weather routing have significant financial implications — a single transpacific crossing can consume hundreds of tonnes of fuel, and a one-knot speed variation over a 12-day voyage materially affects both cost and schedule. The western Pacific generates more tropical cyclones than any other basin (≈26 named storms annually), with typhoon season June–November producing winds above 150 knots and waves exceeding 15 metres. North Korea sanctions enforcement is a significant compliance concern: UN Security Council resolutions prohibit ship-to-ship transfers to DPRK vessels, and dark-activity (AIS disablement) is a common evasion signal in the East China Sea and Yellow Sea.
Limited port-call data — fewer than 10 distinct vessels observed at Yokosuka in the last 180 days. ArcNautical does not publish a vessel-type breakdown for low-traffic ports to avoid statistically misleading percentages.
Yokosuka falls under the Tokyo MoU. The Tokyo Memorandum of Understanding (Asia-Pacific) maintains the most active publicly-available regional PSC programme. Across the last 24 months, the Tokyo MoU detention dataset records 5,331 distinct vessel detentions (sourced from OpenSanctions, as of 2026-06-14). Vessel-level detention probability is computed by ArcNautical using flag performance, vessel age, deficiency history, and ownership opacity.
Last 10 vessel arrivals recorded by ArcNautical's AIS pipeline (last 90 days):
| Arrived | Vessel | Flag | Type |
|---|---|---|---|
| 2026-06-02 | SHOSEN MARU NO.8 | 🇯🇵 JP | Cargo |
Plan and score a voyage from Yokosuka using 10 intelligence signals. Get composite risk scores, route-level threat exposure, sanctions screening, and fuel/CII estimates.
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