The requested vessel with name KOWA MARU and MMSI:0 and IMO:5322697 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
KOWA MARU 9041849 431500893 JP SKD / E Sep 15, 2017 12:04 UTC
KOWA MARU NO,3 9798600 431008542 JP MKW OFF Oct 21, 2017 01:56 UTC
KOWA MARU NO.8 9652636 431004009 >JP ATSUMIWAN Oct 21, 2017 02:01 UTC

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