Where is Syouzan Maru now?

Syouzan Maru (Cargo ship, Japan flag) was last seen on AIS on Oct 3, 2026, 04:38 UTC, under way at 10.2 kn, in the Sea of Japan. Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. The crew-entered destination was >JP TMK OFF (voyage report via AISstream.io global terrestrial AIS, received Oct 3, 2026, 03:42 UTC). This report does not confirm the ship’s current route.

What kind of ship is Syouzan Maru?

Syouzan Maru is a cargo ship sailing under the flag of Japan, built in 2015. The vessel is 119.7 m long with a beam of 18 m and has a gross tonnage of 5,468.

What sanctions and inspection records does Voydar hold for Syouzan Maru?

Voydar has no matched sanctions record displayed for Syouzan Maru from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels, the New Zealand Russia Sanctions Register and the French national asset-freeze register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Syouzan Maru. Missing records do not establish whether the ship has been detained.

Syouzan Maru

Cargo ship · Japan · built 2015 · AIS Class A

IMO9739147MMSI431006816Call signJD3891Last AIS position Oct 3, 2026, 04:38 UTC

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In short

Syouzan Maru (Cargo ship, Japan flag) was last seen on AIS on Oct 3, 2026, 04:38 UTC, under way at 10.2 kn, in the Sea of Japan. Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. Its crew-entered AIS destination is >JP TMK OFF; its reported draught is 5.8 m (voyage report via AISstream.io global terrestrial AIS, received Oct 3, 2026, 03:42 UTC).

Current voyage: from Tokyo (departed Sep 25, 2026, 04:24 UTC) to >JP TMK OFF

Vessel type: Cargo ship
Flag: Japan
Year built: 2015
Gross tonnage: 5,468
Size (length × beam): 120 m × 18 m
Registered owner: —

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Last reported position

received Oct 3, 2026, 04:38 UTC

Position: 39.8511° N, 139.7257° E
Area: Sea of Japan
StatusWhat do AIS statuses mean?: Under way using engine
Speed: 10.2 kn
Course: 332°
Heading: 330°

39.8511° N, 139.7257° E

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Last 30 days: 1 port call (Tokyo).

Port calls are detected by Voydar from AIS (at least 30 minutes slow inside a harbour area); see Port calls below.

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Identity & particulars

Name: Syouzan Maru
IMO numberWhat is an IMO number?: 9739147
MMSIWhat is an MMSI?: 431006816
Call signWhat is a call sign?: JD3891
Flag: Japan
Vessel type: Cargo ship
AIS ship type: Cargo
Gross tonnageGross tonnage vs deadweight: 5,468
Deadweight (DWT): Source: Wikidata, record Q104036309. Added to Voydar on September 23, 2026. Licence: CC0 1.0.7,291 t
Length overall: 119.7 m
Beam: 18 m
Year built: 2015

A tag next to a value names the register that supplied it (hover or tap it for the record and date). Values without a tag come from the ship's own AIS broadcasts or from Wikidata. Position and identity are derived live from AIS.

Ownership & management

Each line shows where the fact comes from. Links backed by an identifier point to the company page.

No owner, operator or manager is recorded for this vessel yet.

Timeline

Dated events for this ship from every source Voydar holds, newest first. Each line names its source; derived items say how they were derived.

Date	Event	Source
Sep 25, 2026, 04:24 UTC	Left TokyoAIS-detected	Voydar port-call detector (AIS geofence)
Sep 24, 2026, 22:39 UTC	Arrived at TokyoAIS-detected	Voydar port-call detector (AIS geofence)

Owner, operator and manager changes found by comparing yearly EU MRV reports are dated to the reporting year ("during 2025"), not to a day. Port calls here are the most recent only; the full lists are further down.

Port calls

Two kinds of evidence, kept apart: calls Voydar detected from the ship's AIS positions, and arrivals and departures published by port authorities and customs records.

Detected from AIS AIS-detected

Port	Arrived	Departed	Time in port
Tokyo JPTYO	Sep 24, 2026, 22:39 UTC	Sep 25, 2026, 04:24 UTC	5 h 45 min

Detected by Voydar when the ship's AIS positions stayed slow inside a harbour area. Calls shorter than 30 minutes are not shown. Depends on AIS reception; detection started on June 8, 2026.

Behaviour at sea Voydar-derived

Patterns Voydar derived from this ship's AIS broadcasts. They are inferences, not reports: each one shows how it was computed and how confident we are, and none of them says why a ship behaved this way.

When	What we observed	Confidence
Sep 26, 2026, 02:42 UTC	Draught change Reported draught went from 5.6 m to 5.1 m after leaving Tokyo. Voydar infers the ship probably discharged cargo. Method seadar.behaviour.draught_change v1	Medium (55%)
Sep 25, 2026, 04:12 UTC	Draught change Reported draught went from 5 m to 5.6 m while in port at Tokyo. Voydar infers the ship probably loaded cargo. Method seadar.behaviour.draught_change v1	Medium (65%)

When

What we observed

Confidence

Sep 26, 2026, 02:42 UTC

Draught change

Reported draught went from 5.6 m to 5.1 m after leaving Tokyo. Voydar infers the ship probably discharged cargo.

Method seadar.behaviour.draught_change v1

Medium (55%)

Sep 25, 2026, 04:12 UTC

Draught change

Reported draught went from 5 m to 5.6 m while in port at Tokyo. Voydar infers the ship probably loaded cargo.

Method seadar.behaviour.draught_change v1

Medium (65%)

Source: AISstream.io global terrestrial AIS. AIS data: AISstream.io. Licence: none published.

Derived from AIS positions of feeds whose terms allow display on Voydar. Coverage is terrestrial: gaps are reported only where our receivers kept hearing other ships. Detections below medium confidence are not shown.

How these are computed →

Frequently asked questions

Where is Syouzan Maru now?: Syouzan Maru (Cargo ship, Japan flag) was last seen on AIS on Oct 3, 2026, 04:38 UTC, under way at 10.2 kn, in the Sea of Japan. Voydar has no more recent AIS position for this ship. Its current location cannot be established from this report. The crew-entered destination was >JP TMK OFF (voyage report via AISstream.io global terrestrial AIS, received Oct 3, 2026, 03:42 UTC). This report does not confirm the ship’s current route.
What kind of ship is Syouzan Maru?: Syouzan Maru is a cargo ship sailing under the flag of Japan, built in 2015. The vessel is 119.7 m long with a beam of 18 m and has a gross tonnage of 5,468.
What sanctions and inspection records does Voydar hold for Syouzan Maru?: Voydar has no matched sanctions record displayed for Syouzan Maru from the OFAC SDN list, the UK Sanctions List, the Canadian autonomous sanctions list, the EU list of designated vessels, the New Zealand Russia Sanctions Register and the French national asset-freeze register. Coverage may be incomplete; this is not sanctions clearance. No matched inspection records are displayed for Syouzan Maru. Missing records do not establish whether the ship has been detained.

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