I stayed there one night before a morning flight from Nagoya airport (Centrair). The hotel is placed 3 min on foot from the Kanayama Meitetsu station where all trains to the airport run through or start (however not all airport-bound trains start at Nagoya central station, that's why I chose this hotel at Kanayama).
Hotel seems to be quite new, very nice and clean hotel room, one of this fascinating electronic Japanese toilets with about half a dozen buttons. English speaking personal, friendly, efficient.
Nagoya Castle can be reached by a direct subway line from Kanayama station. Nagoya main station by subway or JR or Meitetsu line.
Should I fly again from Nagoya Centrair, I definitly will use again this very nice hotel.