If you're planning a bit of sightseeing head to Bronze Statue of Iyeyasu Tokugawa— just one of the monuments located 18.3 mi (29.4 km) from the center of Nagoya.
If visiting museums in Okazaki are on your list, you might want to check out the upcoming exhibitions at The Ieyasu and Mikawa Bushi Museum. If you want to see more of the museums in Okazaki, Okazaki City Art Museum isn't far either.