TOUSYOMARU

Particulars

MMSI	431004525
Call sign	JD3528
Flag	Japan
Vessel type	Tanker
Length overall	52 m
Beam	8 m

From her own AIS broadcasts.

Her MMSI

431004525

The first three digits, 431, are the country code of Japan: an MMSI follows a ship's flag, so a new flag brings a new number.

She broadcasts no IMO number. Only larger seagoing ships are required to have one.

Her AIS details

AIS is the radio signal a ship sends so that other ships can see her. This is what her signal tells us.

Seen from above, bow to the right, so port is the upper side. The ring is her GPS aerial, where her crew or installer said it sits. Shiptrail draws the aerial's position, not the middle of the ship.

AIS class	Class BWorked out, not reported: only Class A transponders send a status, and she sends none. Class B is the lighter kind on yachts, fishing boats and other small craft, which reports less often.
To the bow	39 m (A)
To the stern	13 m (B)
To the port side	7 m (C)
To the starboard side	1 m (D)
Heard from	AISStream
On the map since	1 Nov 2026, 03:10 UTC

A, B, C and D are AIS's own names for these four distances.

From her own AIS broadcasts as the feed delivers them.

Ships near her

HAKUHOUMARU Cargo ship1.3 nm
SHINYU MARU Tanker2.3 nm
TAISEI MARU NO,5 Tanker2.3 nm
SHIN TOYORIKI Cargo ship2.7 nm
SAKURAO MARU Cargo ship3.1 nm
SHUOUMARU Tanker4.2 nm
TENSHO Cargo ship5.0 nm
SUMIWAKAMARU NO.7 Cargo ship5.1 nm

Where she is

Position	33.8278° N, 136.3945° E
Speed	11.6 knots
Course	43°
Local time

Voyage

To: Not reported
ETA: Not reported