KOUSEN MARU (IMO 9933171)
KOUSEN MARU is a Chemical Tanker built in 2022 and flying the Japan flag, placing it in its fourth year of service. The vessel reports a deadweight tonnage of 801 metric tonnes, a gross tonnage of 365, and a length overall of 50 metres. At this scale, the vessel is configured for specialized chemical transport operations. The vessel is classed by the Flag authority. It has been observed in the East Asia region over recent periods. The vessel has a history involving one former name and one former flag. No port state control (PSC) inspection records are on file for this vessel.
- Type: Chemical Tanker
- Flag: Japan
- Year built: 2022
- MMSI: 431019369
- Call sign: JD5121
- Gross tonnage: 365
- Deadweight: 801 t
- Length overall: 50 m
- Beam: 10 m
- Registered owner: SENKO KISEN/SHIBAKO MARINE (Japan)
- Ship manager: SHIBAKO MARINE YK (Japan)
- Last AIS position: 33°49.7′N · 131°31.2′E · Speed 11.1 kn · under way · received 18 October 2026 at 03:54 UTC
- Destination: To be nominated
- Arrival alert: rynda.io messages you by email or in Telegram when KOUSEN MARU arrives in port. Free for up to 3 vessels.
Frequently asked questions
What is the vessel type of KOUSEN MARU?
KOUSEN MARU is a Chemical Tanker. It was built in 2022 and is currently in its fourth year of service.
What are the dimensions of KOUSEN MARU?
The vessel has a length overall of 50 metres and a beam of 10 metres. It carries a deadweight tonnage of 801 metric tonnes.
Which flag does the vessel fly?
The vessel currently flies the Japan flag. It has previously operated under one different flag state during its history.
What is the PSC inspection history for KOUSEN MARU?
No port state control (PSC) inspection records are on file for this vessel.
Where has KOUSEN MARU been observed?
The vessel has been observed in the East Asia region. This area represents its primary recent geographic area of operation.
Live AIS via Rynda — combined with classification, PSC, sanctions and ownership data.