Japan flag

RYOSEI MARUTanker · IMO 8944173

JPMoored
World map showing the last known position of RYOSEI MARU at 34° 21.517' N, 133° 8.977' E
NSEW
Current PositionLive

RYOSEI MARU is currently moored in the Sea of Japan, at 34.3586° N, 133.1496° E. It is sailing from MATSUYAMA to SHIGEI with an ETA of 31 Aug 2026, 02:06 UTC. AIS position received 8 Sep 2026, 15:31 UTC.

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Updated 1 hour ago using terrestrial data
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Moored
Current Navigational Status
0.0 kn
Speed
0.0°
/ 247°
Course / Heading
3.7 m
Static Draught
3.2 m
Current Draught

Voyage Tracker

ATD
23:15 UTCAug 29, 2026
Japan flag
SHIGEIJPSIG
ETA
02:06 UTCAug 31, 2026
RYOSEI MARU

RYOSEI MARU

Identity

Tanker
Type
Japan flagJP
Flag
8944173
IMO Number
431301018
MMSI
JL6618
Call Sign

Specifications

71 m × 11 m
Length × Breadth
1998-01-01
Year Built
1,417 t
Deadweight
749 t
Gross Tonnage
N/A
Engine Power
NAKATANI SHIPBUILDING - HIROSHIMA, JAPAN
Builder
NIPPON KAIJI KYOKAI (NKK)
Class Society
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Dive into the fleet, port, and flag state that RYOSEI MARU is part of.

Flag State
All JP-flagged vessels
Browse every ship currently registered under the JP flag, with live AIS positions.
Vessel Type
Browse all Tankers
See the global fleet of tankers tracked on MarineRadar with live AIS data.
Departure Port
Port of MATSUYAMA
Port traffic, arrivals and live vessel positions for MATSUYAMA (JPMYJ).
Destination Port
Port of SHIGEI
Arrivals, berth specifications, and live vessel traffic for SHIGEI (JPSIG).

About RYOSEI MARU

Identity · Ownership · Class · Route

RYOSEI MARU — Tanker

Built in 1998, with a gross tonnage of 749 GT, and a dead weight of 1,417 tonnes, RYOSEI MARU is a tanker registered under the Japan flag. The vessel is owned by ISHIMINE KAIUN - SEIYO, JAPAN, built by NAKATANI SHIPBUILDING - HIROSHIMA, JAPAN.

RYOSEI MARU route and voyage history

RYOSEI MARU is currently on a voyage from MATSUYAMA to SHIGEI with an estimated arrival on 2026-08-31T02:06:00Z. The live route and current course of RYOSEI MARU are shown on the bridge map above, updated whenever the vessel is in range of a coastal AIS receiver or a satellite pass.

Vessel class and identifiers

RYOSEI MARU is classed by NIPPON KAIJI KYOKAI (NKK), which inspects the vessel against its safety and structural rules. Vessels in the same class as RYOSEI MARU can be seen in the Similar Vessels section above or in the full tanker fleet at /vessel-type/tanker.

  • MMSI: 431301018
  • IMO: 8944173
  • Call sign: JL6618
  • Vessel type: Tanker
  • Flag state: Japan

Frequently Asked Questions

Where is RYOSEI MARU right now?+
RYOSEI MARU is currently moored in the Sea of Japan, within the Japan / Korea shipping lane. It is sailing from MATSUYAMA to SHIGEI with an ETA of 31 Aug 2026, 02:06 UTC. Its exact coordinates, speed and ETA are shown at the top of this page and refresh from the latest AIS broadcast.
What are the identifiers for RYOSEI MARU?+
RYOSEI MARU broadcasts MMSI 431301018 and is registered as IMO 8944173, with call sign JL6618. The MMSI is the radio identifier used by AIS; the IMO number stays with the ship for life and does not change with re-flagging or sale.
What type of ship is RYOSEI MARU?+
RYOSEI MARU is classified as a tanker vessel registered under the JP flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full tanker fleet at /vessel-type/tanker and full JP flag list at /flag/jp.
How can I see the live position of RYOSEI MARU?+
MarineRadar shows the latest AIS broadcast from RYOSEI MARU above, with current position, course, speed, and navigation status. Tap "View on map" to centre the live tracker on the vessel and watch its movement update in real time. The same data is available offline-friendly in the iOS and Android apps.
How often is RYOSEI MARU's position updated?+
AIS transponders broadcast position every 2 seconds when underway at high speed and up to every 3 minutes at anchor. The position you see refreshes whenever the ship is in range of a coastal AIS receiver or a satellite pass — typically seconds in coastal waters and minutes offshore.
What class is RYOSEI MARU?+
RYOSEI MARU is classed by NIPPON KAIJI KYOKAI (NKK), the classification society responsible for inspecting the vessel against safety, structural and operational rules. As a tanker, RYOSEI MARU sits in the same design class as the other tankers listed in the Similar Vessels section of the vessel page, or in the full tanker directory at /vessel-type/tanker. RYOSEI MARU has a gross tonnage of 749 GT.

RYOSEI MARU — Key Facts

MMSI
431301018
IMO number
8944173
Call sign
JL6618
Vessel type
Tanker
Flag state
JP
Navigation status
Moored
Current speed
0.0 knots
Course over ground
0.0°
Heading
247°
Last known position
34.3586°, 133.1496°
Destination
SHIGEI
ETA
2026-08-31T02:06:00Z
Departure port
MATSUYAMA
Actual time of departure
2026-08-29T23:15:00Z
Current draught
3.2 m
Maximum static draught
3.7 m
Year built
1998-01-01
Gross tonnage
749
Dead weight
1417 t
AIS last updated
2026-09-08T15:31:51Z