Where is Koushomaru now?

Koushomaru (Cargo ship, Japan flag) was last seen on AIS on Oct 5, 2026, 04:16 UTC, at anchor, near Kisarazu (North Pacific Ocean). The crew-entered destination was >MINAMISODE OFF (voyage report via AISstream.io global terrestrial AIS, received Oct 5, 2026, 04:01 UTC). This report does not confirm the ship’s current route.

What kind of ship is Koushomaru?

Koushomaru is a cargo ship sailing under the flag of Japan, built in 2018. The vessel is 120.5 m long with a beam of 20 m and has a gross tonnage of 7,297.

What sanctions and inspection records does Voydar hold for Koushomaru?

Voydar has no matched sanctions record displayed for Koushomaru 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 Koushomaru. Missing records do not establish whether the ship has been detained.

Koushomaru

Cargo ship · Japan · built 2018 · AIS Class A

IMO9824447MMSI431011131Call signJD4335Last AIS position Oct 5, 2026, 04:16 UTC

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In short

Koushomaru (Cargo ship, Japan flag) was last seen on AIS on Oct 5, 2026, 04:16 UTC, at anchor, near Kisarazu (North Pacific Ocean). Its crew-entered AIS destination is >MINAMISODE OFF; its reported draught is 5.5 m (voyage report via AISstream.io global terrestrial AIS, received Oct 5, 2026, 04:01 UTC).

Current voyage: from Yokohama (departed Oct 3, 2026, 07:28 UTC) to >MINAMISODE OFF

Vessel type: Cargo ship
Flag: Japan
Year built: 2018
Gross tonnage: 7,297
Size (length × beam): 121 m × 20 m
Registered owner: —

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Last reported position

received Oct 5, 2026, 04:16 UTC

Position: 35.4739° N, 139.9359° E
Area: North Pacific Ocean
StatusWhat do AIS statuses mean?: At anchor
Speed: 0 kn
Course: 298°
Heading: 31°

35.4739° N, 139.9359° E

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Last 30 days: 1 port call (Yokohama).

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: Koushomaru
IMO numberWhat is an IMO number?: 9824447
MMSIWhat is an MMSI?: 431011131
Call signWhat is a call sign?: JD4335
Flag: Japan
Vessel type: Cargo ship
AIS ship type: Cargo
Gross tonnageGross tonnage vs deadweight: 7,297
Deadweight (DWT): Source: Wikidata, record Q104379118. Added to Voydar on September 23, 2026. Licence: CC0 1.0.8,812 t
Length overall: 120.5 m
Beam: 20 m
Year built: 2018

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
Oct 3, 2026, 07:28 UTC	Left YokohamaAIS-detected	Voydar port-call detector (AIS geofence)
Oct 2, 2026, 21:58 UTC	Arrived at YokohamaAIS-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
Yokohama JPYOK	Oct 2, 2026, 21:58 UTC	Oct 3, 2026, 07:28 UTC	9 h 30 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
Oct 3, 2026, 02:29 UTC	Draught change Reported draught went from 7 m to 5.5 m while in port at Yokohama. Voydar infers the ship probably discharged cargo. Method seadar.behaviour.draught_change v1	Medium (65%)

When

What we observed

Confidence

Oct 3, 2026, 02:29 UTC

Draught change

Reported draught went from 7 m to 5.5 m while in port at Yokohama. Voydar infers the ship probably discharged 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 Koushomaru now?: Koushomaru (Cargo ship, Japan flag) was last seen on AIS on Oct 5, 2026, 04:16 UTC, at anchor, near Kisarazu (North Pacific Ocean). The crew-entered destination was >MINAMISODE OFF (voyage report via AISstream.io global terrestrial AIS, received Oct 5, 2026, 04:01 UTC). This report does not confirm the ship’s current route.
What kind of ship is Koushomaru?: Koushomaru is a cargo ship sailing under the flag of Japan, built in 2018. The vessel is 120.5 m long with a beam of 20 m and has a gross tonnage of 7,297.
What sanctions and inspection records does Voydar hold for Koushomaru?: Voydar has no matched sanctions record displayed for Koushomaru 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 Koushomaru. Missing records do not establish whether the ship has been detained.

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