🇯🇵 Japan
Pacific Ocean · Naval Base
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Not listed
Sasebo is not inside any Joint War Committee listed area (circular JWLA-035, 16 September 2026).
Source: Joint War Committee circular JWLA-035, 16 September 2026 (LMA/IUA), JWC Listed Areas for hull war, piracy, terrorism and related perils.
Voyages from Sasebo 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.
Routed sea distances from Sasebo to the principal global hubs, computed by ArcNautical's routing engine — around land and through the canals a ship actually uses, not great-circle.
Sasebo 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 5,577 distinct vessel detentions (sourced from OpenSanctions, as of 2026-10-04). Vessel-level detention probability is computed by ArcNautical using flag performance, vessel age, deficiency history, and ownership opacity.
Limited port-call data — fewer than 10 distinct vessels observed at Sasebo between 29 Apr 2026 and 5 Aug 2026. ArcNautical does not publish a vessel-type breakdown for low-traffic ports to avoid statistically misleading percentages. The feed has delivered no positions since 5 Aug 2026, so these figures will not change until it resumes.
The last 10 vessels our AIS feed recorded arriving between 29 Apr 2026 and 5 Aug 2026:
| Arrived | Vessel | Flag | Type |
|---|---|---|---|
| 2026-05-28 | INORI | 🇯🇵 JP | Passenger |
The feed has delivered no positions since 5 Aug 2026, so these figures will not change until it resumes.
Plan and score a voyage from Sasebo using 10 intelligence signals. Get composite risk scores, route-level threat exposure, sanctions screening, and fuel/CII estimates.
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