Ōuchi-juku was a small post station in Japan's Edo period and part of the Aizu Nishi Kaidō. It is now located in the town of Shimogō in Minamiaizu District, Fukushima Prefecture, and is famous for the numerous traditional thatched buildings from the Edo Period that line its main street. [Wikipedia]
Located 20 km south of Aizu, the nearest station is Yunokami Onsen. It takes about 35 minutes from Aizu-Wakamatsu and costs 1030 yen. A bus runs up and down around every hour form April to November and costs 1000 yen round trip.