What Is Narai-juku? The Longest Post Town on the Nakasendo and "Narai of a Thousand Houses"

Published 2026-10-04 · Sources checked 2026-10-04 · Treasure Hunting Co., Ltd.

This guide explains what Narai-juku is and what visitors do there. It uses English pages from the Japan National Tourism Organization (JNTO) and from Go! Nagano, the official travel guide of Nagano Prefecture and the Nagano Tourism Organization. All pages were read on 2026-10-04. Where two pages give different numbers, we give both.

A post town on the road between Kyoto and Edo

Go! Nagano says the well-preserved Narai-juku post town marks the midpoint of the old Nakasendo Road, the Edo-era path connecting Kyoto with old Tokyo. JNTO says the Nakasendo connected the two cities through the mountains over about 530 km, with 69 post towns in total, small localities with inns and restaurants for travelers. Go! Nagano gives the trail's length as 526.3 kilometers.

Narai of a Thousand Houses

JNTO says Narai-juku was once the wealthiest of the eleven post towns on Kiso's Nakasendo Trail, and that in its heyday it was known as "Narai of a Thousand Houses." Its main street stretches over a kilometer. Go! Nagano says the wooden buildings stretch for over 1 km, and another Go! Nagano page gives 1.2 km. It says Narai prospered with overnight guests and with commerce in locally produced lacquerware next to the steep Torii Pass, and that as a result it became the longest post town of the Nakasendo.

How many post towns are in the Kiso Valley?

The pages give different counts. One Go! Nagano page says 11 of the 69 post towns are in the Kiso Valley, another says 12, and the Nakasendo guide says 13. The pages do not explain why, so we do not choose one. All of them name Narai, Tsumago and Magome as the most notable.

What you see on the main street

JNTO says the two-story wooden buildings house soba noodle restaurants, sake shops, souvenir vendors and lacquerware artisans. Go! Nagano says two of the former residences are open to the public and others are restaurants, minshuku lodges and souvenir shops. JNTO singles out the early-1800s Nakamura Residence, with its elegant garden, as a place to see how Narai merchants lived. It also lists pure spring water for travelers at roadside wells called mizuba, and the dragon ceiling of Chosenji Temple, elaborately painted. Cars are prohibited and electric cables are largely concealed, JNTO says in another page. It also notes the Narai Kiso Bridge, constructed entirely of cypress wood.

Shrines at both ends

JNTO says historic temples and atmospheric shrines just off the main street add another layer. At the southern end of town stands the vermilion Shizume Shrine; past it the Nakasendo Trail crosses the Torii-toge Pass to Yabuhara.

Crafts and a workshop

Go! Nagano says that at the Narai Tourist Information Center you can carve your own set of hinoki cypress chopsticks in about 45 minutes. It describes the chopsticks as light, durable and fragrant. It also says visitors can shop for authentic Kiso lacquerware in the town. JNTO adds that the area's artisans specialize in crafts from lacquerware to woodcarving.

Staying overnight

Go! Nagano says Narai, Tsumago and Kiso-Fukushima have offered lodging for hundreds of years and still do, but that capacity and options are more numerous around Lake Suwa and in Matsumoto. It says inns around Narai tend to be small and traditional. The pages name some inns; we do not repeat them, and we have no prices. JNTO says the post town attracted around 600,000 visitors in 2019, and Go! Nagano says that spending the night at an inn lets you feel what it was like in samurai times, and suggests a walk at dusk when the lanterns are lit.

The Kiso Valley setting

Go! Nagano says the Kiso Valley stretches 60 kilometers from north to south, sandwiched between the Central Alps to the east and Mt. Ontake to the west. Another page calls the 70 km section of the road along the Kiso River the Kisoji and says it was regarded as the roughest stretch of the whole Nakasendo.

What we could not verify, and therefore left out

• Opening hours and admission fees of the public residences and the museums.
• Prices of lodging and of the chopstick workshop.
• The exact count of Kiso Valley post towns and the main street's exact length.

Related guides

• How do you get to Narai-juku and get around the Nakasendo post town?
• What is Narai like through the year? The Lacquerware Festival and the Torii Pass walk

Sources

All URLs retrieved 2026-10-04.

1. Narai (Nakasendo) (JNTO) — (town, sights)
2. The Nakasendo Rail Trail (JNTO) — (route, bridge, cars)
3. Stay inside a refurbished inn in Narai-juku (JNTO) — (visitors)
4. Narai Post Town (Go! Nagano) — (midpoint)
5. Kiso Valley and the Nakasendo Road (Go! Nagano) — (post towns, lodging)
6. The Kiso Valley (Go! Nagano) — (post towns)
7. The Nakasendo Trail [Guide] (Go! Nagano) — (workshop)