The requested vessel with name KORYU MARU and MMSI:0 and IMO:7851111 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
KORYU MARU 9697480 431005484 JP ANE OFF Oct 21, 2017 10:47 UTC
KORYU MARU 9608104 431002489 >JP KIS Oct 20, 2017 22:36 UTC
KORYU MARU 9644471 431003941 JP KUH 3 Oct 15, 2017 10:17 UTC
KORYU MARU NO.28 N/A 431501445 Sep 03, 2017 01:16 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.