RYUOHSAN (IMO 9878682)
RYUOHSAN is a Crude Oil Tanker built in 2020 and flying the Japan flag, placing it in its sixth year of service. The vessel reports a deadweight tonnage of 311,808 metric tonnes and a gross tonnage of 162,244. Given its significant deadweight capacity, it is configured for large-scale crude oil transport operations. RYUOHSAN is classed by Nippon Kaiji Kyokai, which is an IACS member. The vessel has been observed in the Singapore Strait, the Malacca Strait, and the South China Sea over recent periods. It has previously operated under one former name and one former flag. No port state control (PSC) inspection records are on file for this vessel.
- Type: Crude Oil Tanker
- Flag: Japan
- Year built: 2020
- MMSI: 431005000
- Call sign: 7KHY
- Gross tonnage: 162244
- Deadweight: 311808 t
- Length overall: 340 m
- Beam: 60 m
- Registered owner: RYUOHSAN MARITIME CO LTD (Japan)
- Ship manager: MITSUI OSK LINES LTD (Japan)
- ISM manager: MOL GLOBAL SHIP MANAGEMENT PTE
- Last AIS position: 17°20.5′N · 065°33.7′E · Speed 12.5 kn · under way · received 11 October 2026 at 08:05 UTC
- Destination: Nagoya, Aichi (JP NGO) · ETA 28 October 2026 at 20:06 UTC (as broadcast by the vessel)
- Arrival alert: rynda.io messages you by email or in Telegram when RYUOHSAN arrives in Nagoya, Aichi. Free for up to 3 vessels.
Frequently asked questions
What is the vessel type and age of RYUOHSAN?
RYUOHSAN is a Crude Oil Tanker built in 2020. It is currently in its sixth year of service.
What are the capacity specifications for RYUOHSAN?
The vessel has a deadweight tonnage of 311,808 metric tonnes. Its gross tonnage is recorded at 162,244.
Which classification society manages RYUOHSAN?
The vessel is classed by Nippon Kaiji Kyokai. This society is a member of the International Association of Classification Societies (IACS).
Where has RYUOHSAN been recently observed?
The vessel has been observed in the Singapore Strait and the Malacca Strait. It has also been recorded operating in the South China Sea.
What is the PSC inspection history for this vessel?
No port state control (PSC) inspection records are on file for this vessel.
Live AIS via Rynda — combined with classification, PSC, sanctions and ownership data.