A cheat day on the Nakasendo Way: Tsumago to Kiso-Fukushima

The Walk Japan guide for this walk says this is the hardest day. 15 miles, most of which is uphill! Since I wasn't feeling all that well (jetlag + intestinal issues) I decided to cut it short (which is an option). I walked 4 miles and then took the train.
walkjapan.com/...