15 Must-Visit Sightseeing Spots in Mutsu City, Aomori – Exploring Osorezan and Its Surroundings

When it comes to famous sightseeing spots in Mutsu City, Aomori Prefecture, Osorezan (Mount Osore) is undoubtedly at the top of the list. Known as the "closest place to the afterlife," it is a popular destination for both spiritual seekers and tourists. However, Mutsu City offers many more incredible attractions beyond Osorezan! From seasonal locations that can only be accessed during certain months to scenic natural spots, Mutsu is a city filled with hidden gems.
This guide introduces 15 must-visit sightseeing locations in Mutsu City.

1. Osorezan – The Sacred Mountain of the Afterlife

Founded in 862 by the Tendai Buddhist monk Ennin, Osorezan (also known as Mount Usoriyama) is considered one of Japan’s Three Great Sacred Mountains, alongside Mount Koya and Mount Hiei. Open only from May to October, this mystical place is a must-visit when traveling to Mutsu City.

The entire mountain is filled with the scent of sulfur, and the sulfuric gas from volcanic activity creates a strikingly surreal landscape. It's easy to understand why Osorezan is known as "the closest place to the afterlife."

Twice a year, a special festival is held where Itako shamans perform the ritual of spirit communication with the deceased. This rare event attracts large crowds, with some visitors lining up from early morning.

2. Osorezan Bodaiji Temple

Entering Osorezan Bodaiji Temple through its main gate, visitors will see nearly 40 stone lanterns lining the path. The Jizo Hall, which enshrines Jizo Bosatsu, is said to be the gathering place for the souls of the deceased. Visitors will notice stacks of small stones placed throughout the site, offerings made in remembrance of the departed.

3. Lake Usoriyama

A crater lake formed within the Usori Caldera, Lake Usoriyama adds to Osorezan’s mystical atmosphere. Visitors can walk around the entire lake via a scenic hiking trail, allowing them to fully immerse themselves in the unique landscape and sulfuric scent of the area.

4. Osorezan Onsen

Located within Osorezan, this sulfur-rich hot spring is believed to help with nerve pain, rheumatism, and digestive disorders. Soaking in a hot spring amid the rugged volcanic landscape of Osorezan is a truly one-of-a-kind experience.

5. Kamafuseyama Observatory

Standing at the highest peak in the Shimokita Peninsula, Kamafuseyama Observatory offers breathtaking panoramic views of Mutsu City. At night, the city lights create a stunning nightscape, which has even been designated as a "Japan Night View Heritage Site".

6. Yagen Valley

Yagen Valley is a pristine natural paradise, offering a well-maintained walking trail that ensures a safe and immersive experience in nature. The 4-kilometer trail stretches from Yagen Bridge to Okuyagen Onsen, taking approximately one hour to complete. After enjoying a relaxing nature walk, visitors can soak in a hot spring to rejuvenate their bodies and minds.

The autumn foliage in Yagen Valley is truly breathtaking! Every year, many tourists visit to admire the stunning fall colors, making it a must-see seasonal attraction in Mutsu City. While it can get crowded during peak foliage season, visiting at this time is highly recommended for an unforgettable experience.

7. Kappa no Yu (Hot Spring)

A free outdoor hot spring, perfect for budget travelers! The simple mineral spring is known for its benefits in treating gastrointestinal issues, skin conditions, and women's health concerns. The bathing hours for men and women are different, so be sure to check the schedule before visiting. For those looking to enjoy an outdoor hot spring experience, there is also a paid open-air bath called "Fufu Kappa no Yu" (Couple’s Kappa Hot Spring), making it a great option for a relaxing soak in nature.

8. Hokkyo-kan Museum

A naval history museum, showcasing over 1,000 historical artifacts related to the Imperial Japanese Navy and Self-Defense Forces. Admission is free! At the museum, visitors can explore historical documents and artifacts dating back to the establishment of the Imperial Japanese Navy’s Ōminato Torpedo Corps in 1902 (Meiji 35), up to the present day. If you're visiting Mutsu City, this is a must-see destination for history enthusiasts. Additionally, guided tours are available upon prior request, offering a more in-depth experience of the museum’s exhibits.

9. Kawauchi Marine Beach

The largest beach in Mutsu City, fully equipped with restrooms, showers, changing rooms, and coin lockers. Free parking makes it convenient for travelers on a road trip. How about adding this spot to your Mutsu summer travel itinerary?

10. Kawauchigawa Valley Promenade

The Kawauchigawa Valley features a well-maintained 4.4-kilometer walking trail, perfect for a relaxing nature walk. Along the route, visitors can explore scenic spots such as Shimodogafuchi Park, Sekirei Bridge, Yatsuhashi Bridge, and Otaki Rest Area, making it an ideal hiking and sightseeing destination. The entire trail takes about 1 hour and 30 minutes to complete at a leisurely pace. At the end of the promenade, you'll find Kawauchi Lake Lakeside Park and Yunokawa Onsen Resort, both excellent spots to unwind after your walk.

11. Tai Island

An uninhabited island about 1 km off the coast of Mutsu City. The island's shape resembles a swimming sea bream (Tai fish), giving it its name. Tai Island and its surrounding waters have been designated as a marine park, making it a great destination for nature lovers. From spring to autumn, visitors can take a sightseeing boat tour around the island, offering a unique perspective of its scenic beauty. If you're planning a trip to Mutsu City during this season, be sure to take advantage of the boat tours for an unforgettable experience!

12. Wakinosawa Wild Monkey Park

At Wakinosawa Wild Monkey Park, visitors can see around 50 charming Japanese macaques up close. Since these monkeys are designated as a Natural Monument, the park attracts many tourists eager to observe them in their natural-like habitat. However, please note that the park is closed during winter, so be sure to check before visiting.

13. Entsuji Temple

Founded in 1522, Entsuji Temple is the main temple of Osorezan Bodaiji Temple.
The temple is notable for a Hotei statue once cherished by Matsudaira Yoritaka, as well as a monument dedicated to the 33rd anniversary of fallen warriors in the Boshin War, built in 1900 (Meiji 33).

14. Mutsu Science & Technology Museum

The Mutsu Science & Technology Museum is a popular attraction for families and children.
Visitors can enjoy interactive exhibits, such as the Communication Theater, and explore a real nuclear reactor room from the former nuclear-powered ship "Mutsu".

The second floor features simulators and games, making it a fun and educational experience for both kids and adults. On weekends and holidays, the museum also hosts workshops, where visitors can participate in hands-on activities. The themes change monthly, so check their official website for updates.

15. Mutsu Yatate Onsen

Located on the way to Osorezan, Mutsu Yatate Onsen is a soothing hot spring known for its high-salinity sodium chloride mineral water. The spring is believed to help with rheumatism and mobility disorders, making it a great place to relax and rejuvenate. A unique feature of this onsen is its wooden headrests placed on the floor, allowing visitors to lie down and submerge their entire body in the warm waters while fully reclining.

◎Summary

From famous spiritual sites like Osorezan to stunning autumn foliage, scenic nature walks, and rejuvenating hot springs, Mutsu City offers a wide range of attractions for visitors. With plenty of hot springs available, you can treat both your body and soul to a luxurious and relaxing journey. While exploring, don’t forget to try local delicacies such as Miso Shellfish Grilled Dish, Bego Mochi, and Squid Ink Ramen for a truly authentic Mutsu experience!

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