JR Narai is a tiny wooden station with a red sheet-metal roof. Two platforms, one ticket gate, a vending machine in the waiting area. The trains run roughly every hour in each direction — that’s the sole rhythm of the valley.

Cross the tracks via the underpass and you’re at the south entrance of the post town. Pick up a Japanese-language map at the small tourism counter near the gate (English versions are usually stocked too).

JR Narai. The trains run on diesel here, so they keep running even in heavy snow.

Naraijuku stretches about a kilometer south of the station. Wooden inns, dark cedar facades, lattice windows, and the Kiso mountains framing the view at the end of the street. In the morning the eastern side of the road is in shadow and the western side is in full sun — the contrast is the photographic gift of this town.

Walk slowly. Stop at the lacquerware shops if anything catches your eye — Naraijuku has been making lacquer combs and bowls for over four hundred years, and the smaller shops are still family operations.

The main street view that earns its place on every Kiso valley brochure. Worth the trip on its own.

For a deeper walk-through of the architecture and the route, see the Walking Narai-juku guide.

Most visitors stop at the south end of the main street and turn back. Don’t. Walk another ten minutes and you’ll find a small red torii in a cedar grove. This is Shizume Shrine — built in 1618 to stop an epidemic in the village. Free, always open, almost always empty.

Shizume Shrine — the part of Naraijuku most travelers skip.

For the full story, see the Shizume Shrine guide.

The lunch spots cluster in the central third of the post town. The Kiso valley is soba country — buckwheat grows well at altitude — so most restaurants serve handmade soba alongside seasonal mountain vegetables. Two regional specialties to try: gohei mochi (grilled rice cake brushed with walnut-miso sauce) and sansai soba (soba with mountain greens).

A typical Naraijuku storefront — yellow noren in the doorway, firewood by the wall.

Lunch service often ends by 14:00 and dinner options inside the post town are limited. Eat now or you’ll be eating at the Nagiso side later.

Walk back to JR Narai. The Chuo Honsen south runs roughly hourly. The ride to Nagiso is about 55 minutes, threading through the Kiso valley with the river on the right side most of the way. Sit on the right side of the carriage. Phones down. The valley narrows, the cedars close in, the river twists below.

Tickets are cheap (~¥1,200) and you can pay at the gate or use IC if your card works in this section (some local trains here are still cash/paper-ticket only — bring small bills).

Tsumago feels different from Naraijuku. Smaller, quieter, with cobblestone streets and a tighter cluster of preserved buildings. The town outlawed cars from its main street in the 1970s — there are no power lines visible from the central section. The result is a street that looks closer to the Edo-period photograph than any other post town in Japan.

Tsumago’s main street. No power lines visible from the central section — a town-level decision the locals made and kept.

Don’t miss the Waki-honjin museum (a former secondary lodging house for samurai officials, still standing) and the kōsatsuba noticeboard reconstruction. The walk takes 1.5 to 2.5 hours depending on how slowly you go and how many shops you stop at.

For a deeper guide to Tsumago specifically, see Tsumago-juku on the Nakasendo.

Catch the local bus from Tsumago back to JR Nagiso. The last bus is usually around 5:00 PM in winter, 6:00 PM in summer — don’t miss it. The walk back is doable but takes 30 minutes on a road without sidewalks, and you’ll be tired.

From Nagiso, the Chuo Honsen heads north to Matsumoto (~2.5 hours) or south to Nagoya (~1.5 hours). Train frequencies drop after 6 PM.