Jyohou Maru
Oil tanker · Japan · built 2012 · AIS Class A
In short
Jyohou Maru (Oil tanker, Japan flag) was last seen on AIS on , at anchor, in the port of Wakayama. Its crew-entered AIS destination is >JP WAK KAINAN OFF; its reported draught is 5.2 m (voyage report via AISstream.io global terrestrial AIS, received Oct 6, 2026, 12:20 UTC). It arrived there on Oct 5, 2026, 02:54 UTC.
- Vessel type
- Oil tanker
- Flag
- Japan
- Year built
- 2012
- Gross tonnage
- 3,547
- Size (length × beam)
- 104 m × 16 m
- Registered owner
- —
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Last reported position
received- Position
- 34.1611° N, 135.1331° E
- Area
- North Pacific Ocean
- StatusWhat do AIS statuses mean?
- At anchor
- Speed
- 0.2 kn
- Course
- 151°
- Heading
- 354°
Last 30 days: 2 port calls (Wakayama).
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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- Name
- Jyohou Maru
- IMO numberWhat is an IMO number?
- 9634866
- MMSIWhat is an MMSI?
- 431003435
- Call signWhat is a call sign?
- JD3329
- Flag
- Japan
- Vessel type
- Oil tanker
- AIS ship type
- Tanker
- Gross tonnageGross tonnage vs deadweight
- 3,547
- Deadweight (DWT)
- Source: Wikidata, record Q117109129. Added to Voydar on September 23, 2026. Licence: CC0 1.0.5,735 t
- Length overall
- 104 m
- Beam
- 16 m
- Year built
- 2012
JapanA 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.
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 |
|---|---|---|---|
| Wakayama JPWAK | Oct 5, 2026, 02:54 UTC | in port | — |
| Wakayama JPWAK | Sep 29, 2026, 20:53 UTC | Oct 5, 2026, 02:08 UTC | 5 d 5 h |
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 30, 2026, 06:19 UTC | Draught change Reported draught went from 6.7 m to 5.2 m while in port at Wakayama. 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.
Frequently asked questions
- Where is Jyohou Maru now?
- Jyohou Maru (Oil tanker, Japan flag) was last seen on AIS on Oct 6, 2026, 12:50 UTC, at anchor, in the port of Wakayama. The crew-entered destination was >JP WAK KAINAN OFF (voyage report via AISstream.io global terrestrial AIS, received Oct 6, 2026, 12:20 UTC). This report does not confirm the ship’s current route.
- What kind of ship is Jyohou Maru?
- Jyohou Maru is an oil tanker sailing under the flag of Japan, built in 2012. The vessel is 104 m long with a beam of 16 m and has a gross tonnage of 3,547.
- What sanctions and inspection records does Voydar hold for Jyohou Maru?
- Voydar has no matched sanctions record displayed for Jyohou 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 Jyohou Maru. Missing records do not establish whether the ship has been detained.
Neighbouring IMO numbers
IMO numbers are issued in sequence. These are the nearest numbers below and above this ship's that have a full Voydar profile.
Use this data
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