The requested vessel with name KOTOKU MARU NO16 and MMSI:0 and IMO:6704593 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
KOTOKU MARU NO.16 N/A 431007057 >JP HIM Jan 23, 2018 06:25 UTC

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