Shukuba (宿場) were post stations during the Edo period in Japan, generally located on one of the Edo Five Routes or one of its sub-routes. They were also called shuku-eki (宿駅). These post stations were places where travelers could rest on their journey around the nation. They were created based on policies for the transportation of goods by horseback that were developed during the Nara and Heian periods.

Tsumago-juku was the forty-second of the sixty-nine post towns on the Nakasendō. It is located in Nagiso, Kiso District, Nagano Prefecture, Japan. It has been restored to its appearance as an Edo-era post town and is now a popular tourist destination.