NoFlyZone, the Tokugawa Art Museum in Nagoya has some nice special exhibits if the timing is right....
http://www.tokugawa-art-museum.jp/english/

I just return from Nagoya and I recommend you to stay at Meitetsu Grand Hotel

http://www.hotelscombined.hk/Hotel/M...m?a_aid=145447

I've booked Royal Park The Nagoya mainly to see if that's really how they say the name. It's also uber convenient.