Japan flag

KOSEI MARUTanker · IMO 9428140

JPMoored
World map showing the last known position of KOSEI MARU at 35° 40.613' N, 139° 59.066' E
NSEW
Current PositionLive

KOSEI MARU is currently moored in the Sea of Japan, at 35.6769° N, 139.9844° E. It is sailing from MIZUSHIMA to FUNABASHI with an ETA of 6 Sep 2026, 22:31 UTC. AIS position received 8 Sep 2026, 19:04 UTC.

Show in Map
Updated 23 minutes ago using terrestrial data
Live Satellite · latest position

See where KOSEI MARU is now

This fix came from a shore antenna, and those stop at the coast. Use a satellite credit to track this vessel in the deep sea.

$0.99 for 1 satellite position

Moored
Current Navigational Status
0.1 kn
Speed
283.0°
/ 289°
Course / Heading
5 m
Static Draught
4.1 m
Current Draught

Voyage Tracker

ATD
06:44 UTCSep 3, 2026
ETA
22:31 UTCSep 6, 2026
KOSEI MARU

KOSEI MARU

Identity

Tanker
Type
Japan flagJP
Flag
9428140
IMO Number
431000156
MMSI
JD2378
Call Sign

Specifications

75 m × 12 m
Length × Breadth
2007-01-01
Year Built
1,857 t
Deadweight
749 t
Gross Tonnage
N/A
Engine Power
MAEBATA SHIPBUILDING TEKKO - SASEBO, JAPAN
Builder
NIPPON KAIJI KYOKAI (NKK)
Class Society
Live tracking · 50,000+ mariners

Track KOSEI MARU live on MarineRadar

Real-time AIS positions, voyage history, and arrival alerts for KOSEI MARU — straight from your phone.

Live AIS positionsVoyage historyArrival alerts
Get the App

4.6 ★ · 18,000 reviews

Dive into the fleet, port, and flag state that KOSEI 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 MIZUSHIMA
Port traffic, arrivals and live vessel positions for MIZUSHIMA (JPMIZ).
Destination Port
Port of FUNABASHI
Arrivals, berth specifications, and live vessel traffic for FUNABASHI (JPFNB).

About KOSEI MARU

Identity · Ownership · Class · Route

KOSEI MARU — Tanker

Built in 2007, with a gross tonnage of 749 GT, and a dead weight of 1,857 tonnes, KOSEI MARU is a tanker registered under the Japan flag. The vessel is owned by TABUCHI KAIUN - OSAKA, JAPAN, built by MAEBATA SHIPBUILDING TEKKO - SASEBO, JAPAN.

KOSEI MARU route and voyage history

KOSEI MARU is currently on a voyage from MIZUSHIMA to FUNABASHI with an estimated arrival on 2026-09-06T22:31:00Z. The live route and current course of KOSEI 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

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

  • MMSI: 431000156
  • IMO: 9428140
  • Call sign: JD2378
  • Vessel type: Tanker
  • Flag state: Japan

Frequently Asked Questions

Where is KOSEI MARU right now?+
KOSEI MARU is currently moored in the Sea of Japan, within the Japan / Korea shipping lane. It is sailing from MIZUSHIMA to FUNABASHI with an ETA of 6 Sep 2026, 22:31 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 KOSEI MARU?+
KOSEI MARU broadcasts MMSI 431000156 and is registered as IMO 9428140, with call sign JD2378. 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 KOSEI MARU?+
KOSEI 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 KOSEI MARU?+
MarineRadar shows the latest AIS broadcast from KOSEI 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 KOSEI 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 KOSEI MARU?+
KOSEI 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, KOSEI 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. KOSEI MARU has a gross tonnage of 749 GT.

KOSEI MARU — Key Facts

MMSI
431000156
IMO number
9428140
Call sign
JD2378
Vessel type
Tanker
Flag state
JP
Navigation status
Moored
Current speed
0.1 knots
Course over ground
283.0°
Heading
289°
Last known position
35.6769°, 139.9844°
Destination
FUNABASHI
ETA
2026-09-06T22:31:00Z
Departure port
MIZUSHIMA
Actual time of departure
2026-09-03T06:44:00Z
Current draught
4.1 m
Maximum static draught
5 m
Year built
2007-01-01
Gross tonnage
749
Dead weight
1857 t
AIS last updated
2026-09-08T19:04:00Z