The requested vessel with name KAIKOMARU NO23 and MMSI:431401396 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
KAIKOMARU NO.36 N/A 431401138 Dec 19, 2016 16:42 UTC
KAIKOMARU NO.7 8131099 431200050 JP MKW Feb 17, 2018 03:18 UTC
KAIKOMARU NO.8 N/A 431005436 Jan 29, 2018 06:28 UTC
KAIKOMARU NO38 N/A 431700235 Dec 19, 2016 17:35 UTC

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