Arimatsu is the best-preserved post town in the Nagoya area, half an hour south of the city on the Meitetsu line. About a kilometre of the old Tokaido road has survived more or less intact, lined with shibori workshops, low-eaved merchant houses, and a small museum (the Arimatsu-Narumi Shibori Kaikan) where you can watch master craftsmen at work and buy directly from them.
The Festival of the Floats on the first weekend of October pulls three ornate festival carts through the town, decorated with hand-carved figures and mechanical karakuri puppets. The town is small — a leisurely loop including the museum takes about three hours. Arimatsu Station (Meitetsu Nagoya line), then a five-minute walk.