Top 10 Recommended Tourist Spots in Naruko Onsen! Enjoy Autumn Foliage and Relax in Hot Springs During Winter

Naruko Onsen is one of the oldest hot springs in the Tohoku region, enjoyed since the 9th century. Together with Higashi-Naruko Onsen, Kawatabi Onsen, Nakayamadaira Onsen, and Onikobe Onsen, it forms the "Naruko Onsenkyo" hot spring village, which is said to have nearly 400 hot spring sources. It is easily accessible—just one train ride from Furukawa Station on the Tohoku Shinkansen or a direct drive via the national highway from the Tohoku Expressway. The sightseeing train "Resort Minori," which runs from Sendai through Naruko Onsen to Shinjo in Yamagata Prefecture, is also popular. Naruko Onsen is not only famous for its hot springs but also as a crafts center, being home to one of Japan's three major kokeshi doll traditions. In autumn, Naruko Gorge becomes one of the most renowned spots in Tohoku for viewing autumn foliage. This time, we have compiled information on sightseeing spots around Naruko Onsen.

1. "Ashiyu Shimojigoku Gensen" – Free Flowing Hot Spring Where You Can Make Onsen Eggs

Naruko Onsen is rich in hot spring water, and there are many free foot baths scattered throughout the town. Among them, "Ashiyu Shimojigoku Gensen," located at the eastern base of the mountain, is a unique spot where you can not only warm your feet but also make your own onsen eggs. Baskets with chains are provided, so all you need to bring is raw eggs, making it easy for anyone to enjoy this fun experience.
The footbath water flows naturally from the hot spring source through wooden channels. As it travels, it naturally cools to a comfortable temperature, meaning the bath is a 100% natural hot spring with no added water! Just soaking your feet will make your whole body feel warm. A parking area is available for visitors, making it a great stop even for those just passing through Naruko.

2. "Naruko Onsen Shrine" – Kokeshi Stamped Goshuin and the Yoshitsune Legend

Naruko Onsen dates back over 1,000 years. In 835 (Shōwa 2), a volcanic eruption suddenly caused hot spring water to gush out, leading to the construction of Naruko Onsen Shrine by imperial order. This makes it a historically significant site, marking the origins of Naruko Onsen. It is said to have connections with other famous hot spring shrines, such as Dōgo Onsen in Ehime, Arima Onsen in Hyogo, Nasu Onsen in Tochigi, and Iwaki Yumoto Onsen in Fukushima.
Near the shrine’s torii gate stands the "Nakiko Monument," which tells a legend related to Minamoto no Yoshitsune, a famous warrior from the Genpei War. When Yoshitsune fled toward Hiraizumi in Oshu, his wife gave birth to their child, Kamewakamaru, in Dewa Province. However, the baby did not cry upon birth. When they bathed the newborn in the hot springs of Naruko, he finally let out a cry. This led to the area being called "Nakiko" (crying child), which is believed to be the origin of the name "Naruko."
Every September, the "National Kokeshi Festival" is held in Naruko Onsen, and the shrine hosts the "Kokeshi Dedication Ceremony." Even the shrine's goshuin (temple stamp) features a kokeshi design, making it a must-visit place for those interested in Naruko's kokeshi culture.

3. "Taki no Yu" – The Symbolic Public Bath of Naruko Onsen

Located at the foot of the Naruko Onsen Shrine approach, "Taki no Yu" is a traditional public bath that draws its hot spring water from the shrine's sacred source. It is loved not only by tourists but also by locals, making it a culturally significant bathing spot.
The small wooden building features a simple, rustic bathhouse with wooden flooring and walls. Visitors can soak in milky white hot spring water, with two bath options—one hot and one lukewarm—allowing them to choose their preferred temperature. However, please note that there are no washing areas or parking spaces due to the bathhouse’s historical nature. Additionally, photography inside the building is prohibited. Visitors are encouraged to respect the rules and quietly appreciate the blessings of Naruko’s hot springs.

4. "Naruko Gorge" - The Best Autumn Foliage Spot in the Prefecture!

Stretching 4 km, Naruko Gorge is a scenic valley carved by the Otani River, located west of Naruko Onsen. The cliffs rise about 100 meters high, and the valley width ranges from 10 to 100 meters, creating a dramatic natural landscape. The gorge is dotted with uniquely shaped rock formations, making it a must-see attraction in Naruko Onsen.
The best time to visit is during autumn when the cliffs are covered with colorful foliage. Various trees, such as Japanese hornbeam, Mongolian oak, and maple, create a breathtaking gradient of red, yellow, and green. The stunning view of endless autumn colors stretching across the valley is sure to leave visitors in awe.
The top viewing spot is the observation deck at Naruko Gorge Rest House. From here, you can enjoy a spectacular panorama featuring the arch bridge, steep cliffs, and the surrounding mountains.
While autumn is the highlight, visiting during the fresh greenery of spring and summer is also recommended. The 2.2 km-long Naruko Gorge Oofukazawa Trail runs along the river, allowing visitors to enjoy a seasonal nature walk. No matter the season, Naruko Gorge is a must-visit attraction alongside Naruko Onsen.

5. "Naruko Dam" - A Beautiful Arch Dam Built Entirely by Japanese Hands

Naruko Dam, also known as Arao Lake, is Japan’s first arch-shaped concrete dam constructed solely by Japanese engineers. Built in 1957, this dam is a hidden gem for visitors. The best time to visit is during autumn, when the vibrant red, yellow, and green leaves contrast beautifully with the deep blue water. The elegant curves of the dam also make it a popular destination for dam enthusiasts.
Visitors can walk across the dam’s crest, enjoying the striking contrast between the lake on one side and the deep valley on the other. During Golden Week, the dam releases water in a unique "sudare discharge," creating a stunning waterfall effect. At the same time, colorful carp streamers are displayed, symbolizing the Japanese tradition of "Koi no Takinobori" (carp climbing the waterfall). The combination of the clear sky, streaming water, and fluttering streamers makes it a spectacular sight.

6. "Onikobe Onsen" - A Fascinating Area with Geysers and Hell Valley

Further upstream along the Eai River from Naruko Dam, you’ll find Onikobe Onsen, one of the Naruko Onsenkyo (hot spring villages). Located in the Onikobe Caldera, this area still has active geothermal features, with numerous high-temperature hot spring sources.
One of the highlights is the Fukiage Onsen Geyser, a rare natural geyser. It erupts every 10 minutes, shooting hot water up to 15 meters high, impressing visitors each time.
Beyond the geyser, you can explore "Hell Valley," a geothermal area with a free walking trail. Along the path, you’ll see hot water bubbling up from the ground in various spots, creating a dramatic and almost eerie atmosphere. This unique volcanic landscape showcases the raw power of Naruko’s natural environment.

7. A Lake That Changes into Vibrant Colors Like a European Stage – Katanuma

Nestled in the mountains behind Naruko Onsen, Katanuma is a former volcanic crater lake formed during volcanic activity in the year 837 when hot springs erupted. The main reason why Katanuma captivates so many tourists is its stunning lake colors! On a clear morning, it shines bright blue, turns deep green by midday, and transitions into emerald green in the evening—creating a magical display depending on the conditions.
This is a must-visit sightseeing spot in Naruko Onsen throughout the year, but autumn foliage season is particularly recommended. The contrast between the fiery red mountains on the opposite shore and the blue lake creates breathtaking photo opportunities. Just before sunset, the lake’s surface darkens, but the surrounding mountains glow red with the setting sun, merging beautifully with the autumn leaves.
Due to its highly acidic water, no fish live in the lake, and dipping your hand in may cause a tingling sensation. You can enjoy a boat ride on the strikingly blue lake or take a leisurely walk along the scenic trail while admiring the ever-changing water colors. At the lakeside rest house, you can even enjoy coffee brewed with hot spring water.

8. Waseda Sanshiki-yu – A Hot Spring Discovered by Waseda University Students

Another famous communal bath in Naruko Onsen is Waseda Sanshiki-yu. This hot spring was discovered in 1948, just after World War II, when students from Waseda University’s School of Science and Engineering struck a hot spring during a drilling exercise. Since then, it has been cherished by locals as "Waseda's Bath."
The current building was reconstructed in 1998 to mark the 50th anniversary of its discovery. Designed by Professor Osamu Ishiyama from Waseda University's Department of Architecture, the bathhouse features a modern design with skillfully arranged concrete walls. At first glance, it doesn’t resemble a public bathhouse at all. The high ceilings provide a spacious atmosphere where visitors can fully enjoy the soothing waters of Naruko.

9. Iwadeyama – Where Date Masamune Once Lived

Iwadeyama is a town that travelers must pass through when heading to Naruko Onsen from Furukawa. It is historically significant as the place where Date Masamune resided for about 12 years before moving to Sendai to build his castle and town. At the Iwadeyama Castle Ruins, you’ll find a statue of Masamune in simple white robes, quite different from the famous horseback statue at Sendai Castle.
North of the castle, across the river, stands Yubikan, a historical academic institution built in the mid-Edo period. This elegant tourist site features a beautiful strolling pond garden. Although the thatched-roof main building collapsed in the Great East Japan Earthquake, it was successfully restored in 2016, regaining its former glory.
Iwadeyama is a key place for those interested in the history of the Date clan. If you're traveling from Sendai to Naruko Onsen, be sure to stop by and explore its rich heritage.

10. The Ultimate Sanctuary for Kokeshi Doll Enthusiasts – Japan Kokeshi Museum

Naruko Onsen is famous as the oldest kokeshi (traditional wooden doll) production area in Japan. Even today, the onsen town is home to many kokeshi workshops. Located on the way to Naruko Gorge, the Japan Kokeshi Museum is a must-visit destination for kokeshi fans! The museum showcases kokeshi dolls from various regions in Tohoku, offers live demonstrations by skilled craftsmen, and features a hands-on painting area where visitors can create their own original kokeshi. Even those who are not die-hard fans will find plenty to enjoy.
Of course, the museum also sells kokeshi dolls. In addition to the standard "Tachiko" (standing kokeshi), visitors can find unique variations such as "Nemariko" (depicting a child sitting in a formal kneeling position) and "Ezuko" (showing a baby in a straw cradle). The museum also offers daruma dolls, toys, and hina dolls, making for perfect souvenirs from Naruko.
Right next to the Japan Kokeshi Museum is Kouta Myoujin Shrine, a sacred site originally dedicated to artisans specializing in lathe-turned wooden crafts. The lathe, which spins while carving wood, symbolizes fortune coming full circle, and the shrine is believed to bring good luck and prosperity.

◎ Summary

Naruko Onsenkyo, which stretches along the Oku no Hosomichi Yukemuri Line, is home to stunning natural scenery, including the sakura trees along the Eai River, the beech forests, and the nanohana (rapeseed flower) fields of Kawarabi Onsen. With countless hot springs and sightseeing spots, it is impossible to experience everything in just one visit. We highly recommend visiting multiple times to fully enjoy the diverse hot spring sources and attractions of Naruko.