Kourankei
My friend Junko is from Nagoya, so when I asked for recommendations for where to see the leaves changing color (紅葉) she told me Kourankei in Aichi-ken was tops.
It was too warm too late in the year for the maple trees to hit their peak by our late November visit but it was still a really beautiful place to visit. I just wish I didn't have to leave the hotel at 5:30am to ensure I'd get a parking spot.