Tsumago-juku on the Nakasendo.

If you're taking the bus from Magome-juku, remember to check the bus schedule. There's only one bus every two hours or so, and it stops running early. Basically, there's no one around, and even the shops are closed. However, the night view is beautiful with lots of stars and hardly any lights. You can take a stroll outside. The place to stay is a guesthouse where you sleep on tatami mats, and both dinner and breakfast are included. It's nice but a bit pricey. The next morning, you can walk to the bus area below to catch the bus back to the station. Remember to bring enough cash as everything is cash-only, including the bus.