Complete Guide to the Southern Japanese Alps Forest Road (Nagano Prefecture): From Access to Kitazawa Pass to the Latest Recovery Status
The Southern Japanese Alps Forest Road is a mountain forest road approximately 57 kilometers in total length connecting Ina City in Nagano Prefecture and Minami-Alps City in Yamanashi Prefecture, serving as an important tourism and mountaineering route traversing the Southern Japanese Alps National Park. In particular, the Ina City-managed Southern Japanese Alps Forest Road on the Nagano Prefecture side is the only vehicular access road to Kitazawa Pass at an elevation of 2,032 meters, utilized by approximately 49,000 mountaineers annually.
This article focuses on the Nagano Prefecture side of the Southern Japanese Alps Forest Road, comprehensively explaining information that mountaineers and tourists should know, from historical background to current usage status, access methods, traffic restrictions, and recovery status from typhoon damage.
The Southern Japanese Alps Forest Road
Official Name and Management System
The Southern Japanese Alps Forest Road is formally managed as the “Yamanashi Prefecture-managed Southern Japanese Alps Forest Road” on the Yamanashi Prefecture side and the “Ina City-managed Southern Japanese Alps Forest Road” on the Nagano Prefecture side. It is commonly also called the “Southern Japanese Alps Super Forest Road” and is one of Japan’s representative super forest roads constructed to traverse the Akaiseki Mountain Range (Southern Japanese Alps).
The management section on the Nagano Prefecture side extends 16,986 meters from the Todai Bridge (approximately 1,000 meters in elevation) in Haseikurokowchi, Ina City to Kitazawa Pass (2,032 meters in elevation), with Ina City as the manager implementing traffic restrictions for structural preservation of the forest road, traffic safety assurance, and nature protection purposes.
Geographic Features
The Southern Japanese Alps Forest Road is a mountain highway that winds along the eastern mountainside of the Akaiseki Mountain Range. The approximately 22.6-kilometer section from Todai Junction, which serves as the starting point on the Nagano Prefecture side, to Kitazawa Pass features numerous hairpin curves and long tunnels to overcome the steep terrain.
Along the forest road, diverse vegetation suited to elevation can be seen, including Cercidiphyllum japonicum (katsura), Betula ermanii (dake birch), and Picea jezoensis (hiba spruce). Particularly during the autumn foliage season, beautiful scenery featuring predominantly yellow leaves spreads from the valley floor to the pass. On clear weather days, one can also view mountains of the Central and Northern Japanese Alps from the car windows along this scenic route.
History of the Southern Japanese Alps Forest Road
Background and Purpose of Construction
Construction of the Southern Japanese Alps Super Forest Road began in the 1960s. The main initial purpose was the development and extraction of forest resources in the Norokawa basin upstream of Hayakawa. The deep mountain regions of the Southern Japanese Alps contained abundant forest resources, but harsh terrain made efficient forestry management difficult.
With the construction of the forest road, access became possible to previously inaccessible forest areas, and modernization of forestry and activation of the regional economy were expected. Simultaneously, aspects of tourism development within the Southern Japanese Alps National Park were emphasized, and improvement of convenience for mountaineers and tourists was also a major construction objective.
Opposition Movements Against the Super Forest Road
The construction plan for the Southern Japanese Alps Super Forest Road sparked fierce opposition movements among nature conservation organizations and mountaineers from the outset. The Southern Japanese Alps are a precious mountain region with pristine natural environments remaining, and concerns arose about the impact of large-scale forest road construction on ecosystems and landscape destruction.
Environmental protection organizations, particularly the Japanese Nature Conservation Association, strongly opposed the super forest road construction, arguing that it would fragment the old-growth forests of the Southern Japanese Alps and threaten habitats of rare flora and fauna. Additionally, among mountaineering enthusiasts, there were strong opinions that the easy provision of access routes would diminish the mountain’s value.
However, given the desires of local municipalities and forestry-related parties for regional economic activation and tourism promotion, construction proceeded with environmental protection as a condition. As a result, certain sections underwent route changes and work method revisions, demonstrating that opposition movements had certain influence on the approach to forest road construction.
Opening and Changes in Usage
The Southern Japanese Alps Super Forest Road was fully opened in the 1970s. After opening, the forest road’s role gradually shifted from its original forestry purpose to primarily serving as an access route for Southern Japanese Alps mountaineering.
Kitazawa Pass is known as a mountaineering base for representative peaks of the Southern Japanese Alps such as Kaigoma Peak (2,967 meters in elevation) and Senjogatake (3,033 meters in elevation). Before the forest road opening, climbing these mountains required lodging at mountain huts, but the ability to reach Kitazawa Pass by car made day-climbing possible, bringing Southern Japanese Alps mountaineering much closer to the general public.
Conversely, increased automobile traffic and resulting environmental burden became problematic, leading to the introduction of private vehicle restrictions.
Current Usage and Traffic Restrictions
Implementation of Private Vehicle Restrictions
On the Southern Japanese Alps Forest Road (Nagano Prefecture side), year-round private vehicle restrictions are implemented on the entire section from Todai Bridge to Kitazawa Pass for purposes of forest road structural preservation, traffic danger prevention, and nature protection. These restrictions prevent general vehicles from entering the forest road, making use of the Ina City-operated Southern Japanese Alps Forest Road Bus the standard means of accessing Kitazawa Pass.
The restricted sections are as follows:
- Starting point: Haseikurokowchi 2322-77, Ina City (Todai Bridge)
- Ending point: Kurokogoe National Forest 271Ha Forest Division (Kitazawa Pass)
- Length: 16,986 meters
- Manager: Ina City
These restrictions reduce road surface damage and suppress environmental load from exhaust emissions. Additionally, traffic accident risk on narrow mountain roads is significantly reduced.
Operation of the Southern Japanese Alps Forest Road Bus
The primary means of accessing Kitazawa Pass from the Nagano Prefecture side is the Southern Japanese Alps Forest Road Bus operated by Ina City. This bus connects the Todai Junction (Southern Japanese Alps Hase Todai Park) in Hase, Ina City to Kitazawa Pass, covering approximately 22.6 kilometers in about one hour.
Operating Period and Schedule
The Southern Japanese Alps Forest Road Bus operates during the non-snowy season. Typically, the operating period runs from mid-June to early November, though this varies annually depending on snow conditions and road status. Winter sees the entire route closed and bus service suspended.
During peak mountaineering season, multiple buses operate from early morning to accommodate demand. Particularly on weekends, holidays, and during summer vacation periods, congestion is anticipated, making advance reservations or early arrival advisable.
Scenery from the Bus
From the Southern Japanese Alps Forest Road Bus windows, one can enjoy diverse scenery across an elevation difference of approximately 1,000 meters. Departing from Todai Junction, the bus first travels along deep valley sides, then gradually increases elevation.
Along the forest road, vegetation changes according to elevation, transitioning from deciduous trees featuring katsura yellowing, to dake birch and coniferous forests. Particularly during foliage season (early to mid-October), colorful autumn leaves spread from valley floor to pass, making the bus ride itself an attraction.
On clear days, one can also view the mountain ranges of the Central Japanese Alps and distant peaks of the Northern Japanese Alps from the windows, with approximately one hour of bus travel never being dull.
Number of Users
Approximately 49,000 people annually use this forest road bus from the Nagano Prefecture side, establishing it as an important access means for Southern Japanese Alps mountaineering. The majority of users are mountaineers heading for Kaigoma Peak or Senjogatake, though tourism-purpose users increase during foliage season.
Todai Junction (Southern Japanese Alps Hase Todai Park) Facilities
Todai Junction, serving as the terminal for the Southern Japanese Alps Forest Road Bus, features parking and related facilities as “Southern Japanese Alps Hase Todai Park.” Mountaineers arriving by private vehicle park here before switching to the bus.
Facilities include parking, restrooms, a shop, and vending machines, allowing mountaineers to prepare and pass time before climbing. During peak mountaineering season, parking lots may reach capacity, so early arrival is recommended.
Kitazawa Pass: Gateway to Southern Japanese Alps Mountaineering
Location and Importance of Kitazawa Pass
Kitazawa Pass is located at 2,032 meters in elevation near the prefectural boundary between Yamanashi and Nagano. It is the highest point of the Southern Japanese Alps Super Forest Road and also serves as a transportation hub where the Nagano Prefecture and Yamanashi Prefecture forest roads converge.
Kitazawa Pass functions as a mountaineering starting point for both Kaigoma Peak (2,967 meters in elevation) and Senjogatake (3,033 meters in elevation), representative peaks of the Southern Japanese Alps, making it one of the most important bases for Southern Japanese Alps mountaineering.
Facilities at Kitazawa Pass
Two mountain huts at Kitazawa Pass—Chohei Lodge and Kitazawa Komisen Lodge—provide lodging and rest facilities for mountaineers. These huts serve climbers aiming for early departures and as bases for multi-day mountaineering traverses.
A campground is also developed, enabling tent mountaineering. However, certain rules apply for environmental conservation, requiring prior confirmation.
Main Mountaineering Routes from Kitazawa Pass
Kaigoma Peak
The representative route from Kitazawa Pass to Kaigoma Peak is the course via Senmizu Pass. The course covers an elevation difference of approximately 900 meters and takes about four hours one-way, with a 360-degree panoramic view spreading from above the forest line. Kaigoma Peak’s white granite form is also called “the nobleman of the Southern Japanese Alps,” captivating many mountaineers.
Senjogatake
From Kitazawa Pass to Senjogatake, the general route uses the Shosenjatake Ridge. The course covers an elevation difference of approximately 1,000 meters and takes about four and a half hours one-way, featuring relatively gentle slopes. Senjogatake, called “the queen of the Southern Japanese Alps,” offers panoramic views of major Southern Japanese Alps peaks from its summit.
Possibility of Day-Trip Mountaineering
Using early morning buses from the Southern Japanese Alps Forest Road Bus service, day-trip mountaineering to Kaigoma Peak or Senjogatake from Kitazawa Pass is possible. However, the large elevation difference requires substantial physical capability, demanding sufficient mountaineering experience, fitness, and weather judgment. Planning with margin and carrying contingency equipment is recommended.
Typhoon Damage and Recovery Status
Severe Damage from 2019 Typhoon No. 19
In October 2019 (Reiwa 1), Typhoon No. 19 struck the Japanese archipelago, with the Southern Japanese Alps region experiencing record-breaking rainfall. This typhoon caused large-scale collapses and debris flows on both the Yamanashi Prefecture and Nagano Prefecture sides of the Southern Japanese Alps Forest Road, resulting in severe damage.
Particularly on the Yamanashi Prefecture side, the damage was critical, with multiple large-scale slope collapses occurring between Hirohara and Kitazawa Pass, leaving the forest road severely damaged. In some sections, the road itself disappeared, requiring enormous time and expense for restoration.
Recovery on the Nagano Prefecture Side
The Nagano Prefecture side (Ina City-managed Southern Japanese Alps Forest Road) suffered relatively minor damage and completed restoration work by 2020, allowing traffic resumption. This enabled access to Kitazawa Pass from the Nagano Prefecture side using the Southern Japanese Alps Forest Road Bus as before the typhoon damage.
Currently, the forest road on the Nagano Prefecture side operates normally, allowing mountaineers to access Kitazawa Pass from Todai Junction via bus. However, because Yamanashi Prefecture side restoration remains incomplete, through-passage from Kitazawa Pass to the Yamanashi Prefecture side is not currently possible.
Difficult Recovery Status on the Yamanashi Prefecture Side
Meanwhile, the Yamanashi Prefecture forest road remains unrepaired more than four years after typhoon damage. The Hirohara to Kitazawa Pass section has experienced major slope collapses and is under restoration work, preventing all vehicular and pedestrian passage.
Reasons for the difficult Yamanashi Prefecture recovery include:
- Magnitude of Damage: Large-scale collapses in multiple locations exceed simple repair capability
- Geographic Constraints: Steep terrain makes heavy equipment transport and construction itself difficult
- Secondary Disaster Risk: Multiple unstable slopes present safety challenges during construction
- Massive Restoration Costs: Complete recovery is estimated to require tens of billions of yen
- Environmental Conservation Compatibility: Large-scale construction within a national park requires environmental consideration
Impact on Mountaineers
The closure of the Yamanashi Prefecture forest road has created the following impacts:
- Bus access to Kitazawa Pass from the Yamanashi Prefecture side is not possible
- Through-passage routes connecting the Nagano and Yamanashi Prefecture sides are unavailable
- Mountaineering routes starting from Hirohara are restricted
- Supply transport to mountain huts and facilities on the Yamanashi Prefecture side is difficult
Currently, access to Kitazawa Pass is essentially limited to the Nagano Prefecture (Ina City) side route, and climbing major Southern Japanese Alps peaks from the Yamanashi Prefecture side requires longer courses or detour routes compared to previous methods.
Future Outlook
Yamanashi Prefecture continues examining recovery measures, though a specific completion timeline remains undetermined. Regarding recovery methods, discussions continue on whether to restore the forest road conventionally or consider alternative approaches prioritizing natural environment recovery.
Some nature conservation organizations have advocated prioritizing natural recovery over full forest road restoration, and future policy decisions will require consensus among diverse stakeholders including local residents, mountaineers, nature conservation organizations, and government.
Precautions When Using the Southern Japanese Alps Forest Road
Confirmation of Operating Period
The Southern Japanese Alps Forest Road Bus does not operate year-round; it suspends service during snowy periods (approximately mid-November to mid-June). When planning mountaineering trips, always confirm the operating period beforehand on Ina City’s official website.
Additionally, bus service may be suspended temporarily during unfavorable weather or poor road conditions even within the operating period. Particularly after typhoon approaches or heavy rainfall, checking the latest information is essential.
Reservations and Congestion Countermeasures
During peak mountaineering season (late July through August and foliage season in October) and weekends/holidays, the bus becomes quite crowded. To ensure seating, using early morning buses, choosing weekdays, making advance reservations if available, and similar strategies prove effective.
The Todai Junction parking lot can also reach capacity during congestion, so arriving with generous time margins is recommended.
Equipment and Preparation
Kitazawa Pass sits at 2,032 meters elevation with cold temperatures even in summer and sudden weather changes possible. Prepare mountain-appropriate equipment including warm clothing, rain gear, sufficient water and food.
Additionally, cellular signals may not reach certain sections, making maps, compasses, GPS and similar equipment important.
Environmental Consideration
The Southern Japanese Alps Forest Road passes through the Southern Japanese Alps National Park, where precious natural environments are preserved. Always follow nature protection rules: carry away all trash, do not harvest plants, avoid camping and campfires outside designated areas.
High mountain vegetation especially requires care against trampling, so staying on designated trails is essential.
Southern Japanese Alps Forest Road During Foliage Season
Peak Foliage Period
Foliage on the Southern Japanese Alps Forest Road (Nagano Prefecture side) typically peaks in early to mid-October. Due to elevation differences, color begins at pass elevation and gradually descends to lower elevations.
Foliage Characteristics
Foliage along the forest road characteristically features yellowing katsura trees. Katsura leaves turn yellow and release a sweet scent. Additionally, dake birch yellow, mountain ash and sumac reds, and other hues paint the mountains in multiple colors.
During the approximately one-hour bus ride, one can enjoy the foliage gradient from valley floor to pass, with this period attracting not only mountaineers but also tourism-purpose visitors.
Congestion During Foliage Season
Peak foliage periods represent one of the busiest times on the Southern Japanese Alps Forest Road Bus. Weekends especially can see parking lots reaching capacity from early morning, making weekday use or early arrival advisable.
Surrounding Tourist Attractions
Ina City Hase District
The Ina City Hase District, where the Southern Japanese Alps Forest Road begins, features hot spring facilities and roadside stations usable before and after mountaineering. Particularly, a hot spring after descending is ideal for soothing tired bodies.
Takatao Castle Ruins Park
Ina City features Takatao Castle Ruins Park, known as “the finest cherry blossoms in Japan.” In spring, approximately 1,500 Prunus serrulata blooms attract visitors nationwide. Visiting in different seasons alongside Southern Japanese Alps mountaineering is also recommended.
Bunkaiji Pass (Zero Magnetic Field)
The Ina City Hase District features the “zero magnetic field” power spot, Bunkaiji Pass. Located along a different forest road from the Southern Japanese Alps Forest Road, but in the same Hase District, it attracts visitors seeking spiritual experiences.
Conclusion: Current Status and Future of the Southern Japanese Alps Forest Road (Nagano Prefecture Side)
The Southern Japanese Alps Forest Road (Nagano Prefecture side) continues functioning as an important access route to Kitazawa Pass following recovery from typhoon damage. Approximately 49,000 mountaineers annually use this forest road bus to reach Southern Japanese Alps signature peaks including Kaigoma Peak and Senjogatake.
Conversely, the Yamanashi Prefecture forest road’s continued non-restoration affects access throughout the Southern Japanese Alps, with future recovery policies drawing attention. The challenge of balancing natural environment conservation with mountaineer convenience is not unique to the Southern Japanese Alps Forest Road but represents an issue facing Japan’s entire mountainous terrain.
Access to Kitazawa Pass from the Nagano Prefecture side remains stable, and with proper preparation and planning, visitors can fully enjoy the Southern Japanese Alps’ magnificent nature. As a preserved natural environment through private vehicle restrictions, scenery beautiful in each season, and gateway to 3,000-meter class peaks, the Southern Japanese Alps Forest Road will continue serving many people.
We hope mountaineers and tourists will observe environmental protection rules and prioritize safety when using this precious natural environment, passing it to future generations. May the Southern Japanese Alps Forest Road continue sustainably providing opportunities for natural interaction.
