Akiyamago

Region Hikyo
Prefecture
Nagano
Type
Region · Hikyo
N/A
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Restaurant

About This Destination

Thirteen hamlets strung about 20 km along the Nakatsu River gorge, five in Sakae village (Nagano) and eight in Tsunan town (Niigata), with a Heike refugee legend and a riverbed at Kiriake where hot water seeps up and you dig your own bath. No train comes near; the last stretch is a shared taxi you book the day before.

Akiyamago is not one village but thirteen hamlets in the gorge of the Nakatsu River, between Mount Naeba to the east and Mount Torikabuto to the west. The border runs through the middle: the eight lower hamlets, from Ando to Oakazawa, belong to Tsunan in Niigata, and the five upper ones, Kotakezawa, Yashiki, Uenohara, Wayama and Kiriake, belong to Sakae in Nagano. Local tradition says the first settlers were Heike refugees led by Taira no Katsuhide of Kusatsu, beaten by Minamoto no Yoritomo in the 1180s. A 1952 survey found the story had no basis and that the settlers were farmers from the Gunma side escaping taxes. The writer Suzuki Bokushi walked in from Shiozawa in 1828 to record how people lived, at the suggestion of the novelist Jippensha Ikku. Ikku died before it could be printed, and Akiyama Kiko waited until 1932 to be published. The valley is still cut off easily: in the heavy snow of 2006, about 500 residents were isolated for several days. Most of the hot springs are on the Nagano side. At Kiriake, at the far end, hot water seeps up through the gravel of the riverbed. Borrow a shovel from the inn, dig a hollow, and let river water in until the temperature suits you. Kiriake Riverside House currently asks bathers to wear swimwear. Getting in from a station takes half a day or more each way, so stay at least one night.

Location

Prefecture: Nagano

Address: Sakae, Nagano, Japan

Nearest Station: Morimiyanohara Station

Best time to visit: Mid-October to mid-November for autumn colour along the gorge; June to early November if you want to drive in from Shiga Kogen. Winter is open from the Tsunan side but needs a 4WD on winter tyres

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Visitor Information

Credit Cards: Unknown

Official Website

Access

Nagano, Japan

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Frequently Asked Questions

How does the Kiriake river bath work?

Hot water seeps up through the riverbed gravel of the Nakatsu River at Kiriake. You dig a hollow with a shovel and mix in river water until the temperature is right. Kiriake Riverside House lends shovels at its front desk; the spot is about 50 m from its car park, across a suspension bridge. As its page showed it in October 2026, the inn asks bathers to wear swimwear.

Can I get to Akiyamago without a car?

Yes, but it takes planning. Take a Minami Echigo Kotsu bus to Tsunan Yakuba-mae, change to the Tsunan to Mitama bus, and at Mitama take the Morimiya Kotsu shared taxi on into the valley. The taxi must be booked by 17:00 the day before on 025-766-2949, and it does not run on December 31 or January 1. With few buses a day, most visitors stay at least one night.

Can I drive through from Shiga Kogen or Nozori Lake?

Not from Nozori Lake: Route 405 has never been built between Nozori Lake and Kiriake, and the gap is a hiking trail. From Shiga Kogen, only in the warm months. In the 2025-26 season the Okushiga Park Line reopened on May 29, 2026 after closing on November 5, 2025. Kiriake Riverside House recommends the Tsunan side even then, as the Shiga Kogen road can close after heavy rain.

What is Akiyama Kiko?

A travel account by Suzuki Bokushi (1770-1842), the Shiozawa writer best known for Hokuetsu Seppu. He went into the valley in 1828 to record its customs, encouraged by Jippensha Ikku, who planned to publish it. Ikku's death stopped that, and the book was first published in 1932. Bokushi's handwritten manuscript is a designated cultural property of Ojiya city in Niigata.

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