The Spa at Hotel Nagoya Castle
The spa at The Westin Nagoya Castle is referenced by reviewers writing for major publications. Out of 3 professionals tracked on TripExpert, 3 praised the spa, like Frommer's, Fodor's and Lonely Planet.
Hotel Nagoya Castle 
Frommer's
Fodor's
Lonely Planet
Frommer's "Rooms are spacious enough and feature Heavenly Beds, but it's worth staying here only if you get a room with a view (and for most room types, you won't pay more for that view)"
Fodor's "The standard rooms are spacious and conservatively decorated"
Lonely Planet "The castle is popular for its 'heavenly beds', spacious bathrooms, fitness facilities and restaurants"
