This waki-honjin (rest stop) for the daimyōs' (domain lords') retainers was reconstructed in 1877 by a former castle builder under special dispensation from Emperor Meiji. It contains a lovely moss garden and a special toilet built in case Meiji happened to show up – he never did. The adjacent Local History Museum houses elegant exhibitions about Kiso and the Nakasendō, with some English signage.
Waki-honjin (Okuya) & Local History Museum
Tsumago