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Hidagawa Dam Kanayama

4.3
·124 reviews·Gero, Japan

A magnificent rockfill dam offering scenic drives, especially stunning during autumn foliage season. Explore its engineering and enjoy panoramic views...

Highlights

Highlights

Must-see attractions

Social content

Social

From TikTok & Reddit

Best Time

Mid-November

Peak autumn leaf season

CrowdMedium
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展示館からの景色

Hidagawa Dam Kanayama

Best Time

Mid-November

Peak autumn leaf season

CrowdMedium
Highlights

Highlights

Must-see attractions

A magnificent rockfill dam offering scenic drives, especially stunning during autumn foliage season. Explore its engineering and enjoy panoramic views.

4.3
(124 reviews)

"The autumn leaves on the way to the trailhead for Mt. Ryokoku are also spectacular at this time of year."

Vertical photo
TIP

🚗 Scenic Autumn Drives

Drive around the dam for stunning autumn leaf views, especially near Gujo. :fallen_leaf:

📸 Capture Dam Details

The dam's rockfill landscape and the contrasting blue and green waters are photogenic. :camera:

Third hero image

Highlights

Discover the most iconic attractions and experiences

Autumn Foliage Drive

Autumn Foliage Drive

Around the dam lake

Experience breathtaking autumn colors painting the landscape as you drive along the scenic routes surrounding the dam.

Iwaya Dam Exhibition Hall

Iwaya Dam Exhibition Hall

In front of the dam

Learn about the dam's construction and function, and enjoy panoramic views from the exhibition hall's windows.

Dam Top Walkway

Dam Top Walkway

Top of the dam

Stroll across the magnificent rockfill dam for impressive views of the serene dam lake and the surrounding natural beauty.

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Planning Your Visit

Timing Your Visit for Autumn Splendor

The autumn leaves around Hidagawa Dam Kanayama are spectacular, especially near Gujo. Mid-November is peak season for vibrant foliage, offering stunning views as you drive around the dam. Be prepared for cooler weather and watch out for potential wildlife on less-traveled paths.

Dam Enthusiast's Guide

For those interested in the engineering marvels, Hidagawa Dam Kanayama (also referred to as Iwaya Dam in some contexts) offers insights into flood control, irrigation, and power generation. The exhibition hall provides information and panoramic views, and dam cards are available as unique souvenirs.

Best Times

When
Mid-November
Why
Peak autumn leaf season
Crowd
Medium
When
Weekday mornings
Why
Tranquil dam lake views
Crowd
Low

Insider Tips

from TikTok, Instagram & Reddit

🚗 Scenic Autumn Drives

Drive around the dam for stunning autumn leaf views, especially near Gujo. :fallen_leaf: Reddit

📸 Capture Dam Details

The dam's rockfill landscape and the contrasting blue and green waters are photogenic. :camera:

🎁 Collect Dam Cards

Visit the management office for unique dam cards as travel mementos. :gift:

⚠️ Wildlife Awareness

Be mindful of animal droppings and signs of wildlife on less-traveled paths. :deer:

Tips

from all over the internet

🚗 Scenic Autumn Drives

Drive around the dam for stunning autumn leaf views, especially near Gujo. :fallen_leaf: Reddit

📸 Capture Dam Details

The dam's rockfill landscape and the contrasting blue and green waters are photogenic. :camera:

🎁 Collect Dam Cards

Visit the management office for unique dam cards as travel mementos. :gift:

⚠️ Wildlife Awareness

Be mindful of animal droppings and signs of wildlife on less-traveled paths. :deer:

What Travellers Say

4.3
(124 reviews)

Reviews Summary

Visitors appreciate the stunning autumn foliage surrounding Hidagawa Dam Kanayama, making scenic drives a highlight. The dam's impressive structure and the opportunity to walk on top offer great views. Some find the area's untouched feel intriguing, though caution regarding wildlife is advised. The availability of dam cards is a plus for enthusiasts.

"November 15, 2025
I came here because the autumn leaves 🍁 are at their peak around Gujo.
I come here regularly, both by motorcycle and car.
I usually just drive around, take a few photos, and then call it a day, but this time I decided to dig a little deeper, lol.
I found some unexpectedly new places, which was interesting...
The further I went, the more untouched it felt, with animal droppings on the bridge and other signs of human intervention.
No matter how many times I've been here, there's always a strange sense of dread, lol.
The autumn leaves on the way to the trailhead for Mt. Ryokoku are also spectacular at this time of year.

Watch out for stink bugs!"

だぶはち

"I was looking for a beautiful spot to see autumn leaves and finally found this! You can see beautiful autumn leaves by driving around the dam."

OSM

"Dam Tour: Gifu - Iwaya Dam (202503F)
This rockfill dam is 42.5 meters high and 238.0 meters long. It was built on the Ogadora River, a part of the Kiso River system, for flood control, irrigation, drinking water, industrial water, and power generation. The exhibition hall in front displays information about Iwaya Dam, and its windows offer a panoramic view of the dam. The dam's red seal is the only one available here. While vehicles can cross the top, construction was underway on both sides. The rugged rockfill landscape blends seamlessly with the surroundings. The water on the dam lake side is a deep blue, while the water downstream on the power generation facility side is a light green, creating a very different impression. It's likely possible to walk around the dam lake; on a nice day like this, it would be pleasant. Incidentally, the dam lake is about 16km long.
Dam Card: Iwaya Dam Management Office"

TTT III

What People Like

Spectacular autumn leaves
Scenic driving routes
Impressive dam structure

What People Dislike

Signs of wildlife

Frequently Asked Questions

🚇 🗺️ Getting There

Hidagawa Dam Kanayama is best accessed by car, offering scenic drives through the region. While public transport options might be limited, many visitors combine a trip here with other destinations in the Gujo area. Consider using GPS navigation for the most direct route. Reddit

Yes, driving around the dam is a popular activity, especially during autumn. The roads offer beautiful vistas of the dam lake and surrounding foliage. Reddit

Motorcyclists frequently visit Hidagawa Dam Kanayama, enjoying the open roads and scenic views. Ensure your motorcycle is in good condition for winding routes. Reddit

Parking is generally available at designated areas near the dam and exhibition hall, though it might be more limited during peak seasons. Reddit

The dam is located in a region that includes Gujo, known for its autumn foliage. It's often visited as part of a larger trip to this area. Reddit

🎫 🎫 Tickets & Entry

Access to the dam itself and the surrounding areas is generally free. However, specific facilities like the exhibition hall might have their own operating hours and policies. Reddit

The dam and its grounds are typically accessible year-round. The exhibition hall, if open, will have specific operating hours, which are best checked locally. Reddit

Yes, dam cards are available at the Iwaya Dam Management Office. These make for unique and memorable travel souvenirs for enthusiasts. Reddit

Information regarding an entrance fee for the exhibition hall is not widely available, but it's common for such facilities to be free or have a nominal charge. It's advisable to confirm locally. Reddit

While general access is permitted, there might be construction or maintenance activities that could temporarily restrict access to certain areas, such as the top of the dam. Reddit

🎫 🏞️ Onsite Experience

Visitors can enjoy scenic drives around the dam lake, walk on top of the dam for panoramic views, and visit the exhibition hall to learn about its engineering. The surrounding nature is also a draw, especially during autumn. Reddit

It is likely possible to walk around parts of the dam lake, and on a nice day, it would be a pleasant experience. The dam lake itself is approximately 16km long. Reddit

The scenery is characterized by a magnificent rockfill dam, a deep blue dam lake on one side, and lighter green water on the power generation facility side. The surrounding natural landscape is particularly beautiful during autumn. Reddit

The review mentions a trailhead for Mt. Ryokoku near the dam, suggesting hiking opportunities. The autumn leaves on the way to this trailhead are also noted as spectacular. Reddit

Be cautious of animal droppings and signs of wildlife, especially on less-traveled paths. Stink bugs are also mentioned as a potential nuisance. Reddit

📸 📸 Photography

The top of the dam offers excellent vantage points for capturing the dam's structure and the expansive dam lake. The surrounding roads provide opportunities to photograph the autumn foliage with the dam in the background. Reddit

You can capture impressive shots of the rockfill dam, the contrasting colors of the water (deep blue and light green), and the vibrant autumn leaves. The scale of the dam is also a great subject. Reddit

Yes, especially during autumn when the foliage is at its peak. The combination of the man-made structure and the natural landscape creates unique photographic opportunities. Reddit

Early mornings can offer tranquil light on the dam lake, while late afternoons might provide warm, golden hour light. Midday can be harsh but still offers good visibility of the dam's details. Reddit

A wide-angle lens would be useful for capturing the scale of the dam and the surrounding landscape. A telephoto lens could be used for details of the dam's structure or distant scenery. Reddit

For Different Travelers

Tailored advice for your travel style

👨‍👩‍👧 Families with Kids

Hidagawa Dam Kanayama can be an interesting stop for families, especially if you're exploring the Gujo area. The exhibition hall offers a chance for kids to learn about how dams work in a visual way. The top of the dam provides a sense of scale and a safe place for a short walk with expansive views, which can be exciting for children. Reddit

Consider visiting during peak autumn foliage for a visually stimulating experience that even younger children can appreciate. Pack snacks and drinks, as amenities might be limited. The drive around the dam offers changing scenery that can keep kids engaged. Be mindful of wildlife signs and ensure children stay on designated paths for safety. Reddit

🚗 Road Trip Enthusiasts

For road trip lovers, Hidagawa Dam Kanayama is a fantastic destination, particularly for its scenic driving routes. The drive around the dam, especially during autumn, is a highlight, offering continuous beautiful vistas. Many visitors arrive by motorcycle or car, appreciating the open roads and the opportunity to explore the surrounding natural beauty. Reddit

Don't miss the chance to collect a dam card from the management office; it's a unique souvenir for any road trip enthusiast. The dam itself is an impressive piece of engineering, and walking across its top provides a great photo opportunity and a sense of accomplishment. Combine this visit with other attractions in the Gujo region for a well-rounded road trip itinerary. Reddit

Deep Dives

In-depth insights and expert knowledge

The Engineering Marvel: Iwaya Dam

Hidagawa Dam Kanayama, often referred to as Iwaya Dam in official contexts, is a significant rockfill dam standing 42.5 meters high and stretching 238.0 meters in length. Constructed on the Ogadora River, part of the Kiso River system, its primary functions include flood control, irrigation, supplying drinking and industrial water, and power generation. The dam's robust rockfill construction allows it to blend harmoniously with the natural environment. Reddit

The dam's impact on the landscape is visually striking. The dam lake presents a deep blue hue, contrasting with the lighter green water on the side of the power generation facility. This duality in water color adds a unique aesthetic to the reservoir. Visitors can explore an exhibition hall located in front of the dam, which provides detailed information about its engineering and operational aspects, offering a deeper understanding of its importance. Reddit

For those interested in the technicalities, the dam's management office offers dam cards, a popular collectible among dam enthusiasts. The sheer scale of the dam and its integration into the river system make it a point of interest for engineers, geologists, and anyone curious about large-scale infrastructure projects. The dam lake itself extends for approximately 16km, creating a substantial body of water that plays a crucial role in the region's water management. Reddit

Autumn's Palette: A Seasonal Spectacle

The region surrounding Hidagawa Dam Kanayama truly comes alive during the autumn months, with mid-November marking the peak of its spectacular foliage. Visitors often describe the experience of driving around the dam as akin to traversing a canvas painted with vibrant reds, oranges, and yellows. This scenic drive is a major draw, offering breathtaking views that are frequently highlighted by those who visit. Reddit

Beyond the immediate vicinity of the dam, the journey towards natural landmarks like the trailhead for Mt. Ryokoku is also adorned with stunning autumn colors. This suggests that the entire area transforms into a photographer's and nature lover's paradise during this season. The crisp autumn air and the visual feast of the changing leaves create a memorable and immersive experience for all who venture here. Reddit

While the beauty is undeniable, visitors are advised to be mindful of the natural environment. The presence of animal droppings and other signs of wildlife on less-traveled paths indicate that the area is a thriving ecosystem. This adds an element of raw, untouched nature to the otherwise managed landscape of the dam, reminding visitors of the wild beauty that coexists with human engineering. Reddit

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