The requested vessel with name RYOSHIN MARU and MMSI:0 and IMO:8005159 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
RYOSHIN MARU 9413858 431000263 >JP YKK DM Feb 21, 2018 13:50 UTC

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