Nagoya right now is so hot!! It is famous for 
being the most humid city in Japan. And those 
places that you mentioned (Tokui and Kameyama) 
are not in Nagoya! Tokui is about a 3 to 4 hour 
drive away and Kameyama is in Mie prefecture. 
If you get a chance go to Mandarake near Nagoya 
Tower.