Lake Ikawa (Shizuoka Prefecture) Complete Guide | The Charm of Southern Alps Scenic Beauty and Abandoned Railway Trails
Lake Ikawa, located at the northernmost part of Aoi Ward, Shizuoka City, Shizuoka Prefecture, is a beautiful artificial lake cradled by the majestic nature of the Southern Alps. Born from Japan’s first hollow gravity dam, the “Ikawa Goroh Dam,” completed in 1957 (Showa 32), this lake spans approximately 10 kilometers in circumference and captivates visitors with its seasonal scenic beauty and abundant natural surroundings.
This article provides comprehensive information you should know before visiting Lake Ikawa, covering its history, highlights, access methods, and nearby tourist attractions.
About Lake Ikawa | Spectacular Artificial Lake Created by Japan’s First Hollow Gravity Dam
History of Lake Ikawa and Characteristics of Ikawa Dam
Lake Ikawa is an artificial lake formed by the Ikawa Dam (Ikawa Goroh Dam) constructed in the upper reaches of the main Oigawa River system. Dam construction began in 1952 (Showa 27) and was completed in 1957 (Showa 32).
The Ikawa Dam, with a dam length of 243 meters and height of 103.6 meters, is managed by Chubu Electric Power Company and holds historical significance as Japan’s first “hollow gravity concrete dam.” This construction method, by hollowing out the interior of the dam to reduce concrete usage while withstanding water pressure through gravity, was a groundbreaking technology.
The lake formed by the dam construction became a beautiful body of water where clear water flows in from the Southern Alps, and is now beloved by many as one of Shizuoka City’s representative tourist attractions.
As Part of the Southern Alps UNESCO Ecopark
The area surrounding Lake Ikawa comprises part of the “Southern Alps UNESCO Ecopark,” registered in 2014. A UNESCO Ecopark is an international initiative aimed at harmonizing ecosystem conservation with sustainable utilization, and the Lake Ikawa area is recognized as a model region where rich natural environment and human activities coexist.
Positioned at approximately 1,000 meters elevation, Lake Ikawa offers views of 3,000-meter class mountains of the Southern Alps, including Mount Kawachiushi, and the sight of these mountains reflected on the lake’s surface deeply moves visitors.
Highlights of Lake Ikawa | Seasonal Scenic Spots
Abandoned Railway Trail (Nature Walking Path) | Nostalgic Lakeside Stroll
One of Lake Ikawa’s greatest attractions is the “Abandoned Railway Trail,” a nature walking path developed along the lakeshore. This walking path utilizes the abandoned railway track once used during Ikawa Dam construction, with rails and tunnels remaining intact.
The approximately 8-kilometer-long walking path extends from Ikawa Daibutsu to Ikawa Honmura, featuring the 80-meter-long “Dream Suspension Bridge” along the way. This suspension bridge crosses over the lake with thrilling sensation, offering panoramic views of Lake Ikawa’s beautiful surface and surrounding mountains from the bridge.
Walking through abandoned tunnel passages and across old rails creates an experience like traveling through time, enveloped in nostalgic atmosphere. Combined with the abundant surrounding nature, it possesses a unique charm found nowhere else.
Ikawa Daibutsu | Colossal Buddha Statue on the Lakeshore
Ikawa Daibutsu, located near the starting point of the Abandoned Railway Trail, is a must-see spot when visiting Lake Ikawa. This Buddha statue was erected to commemorate those who lost their lives during the Ikawa Dam construction, and its quietly standing form on the lakeshore emanates a mystical atmosphere.
The area surrounding the Buddha is well-maintained, allowing visitors to spend quiet moments while gazing at the lake. Especially at early morning or dusk, the silhouette of the Buddha reflected on the lake’s surface creates a fantastical landscape.
Natural Beauty Throughout the Seasons | Autumn Foliage and Fresh Green Scenery
Lake Ikawa displays different faces throughout the year.
Spring (April–May): Fresh greenery adorns the lakeshore, and the lake swollen with snowmelt displays radiance full of life.
Summer (June–August): High elevation keeps it cool, making it ideal as a summer retreat. The lakeshore enveloped in deep green is surrounded by silence, refreshing both body and mind.
Autumn (October–November): Lake Ikawa’s greatest highlight is the autumn foliage season. Trees lining the lakeshore turn red and yellow, and the foliage reflected on the lake’s surface is breathtaking in beauty. The best viewing period is from late October to early November.
Winter (December–March): The contrast between snow-capped Southern Alps mountains and the quiet lake surface is beautiful, allowing visitors to enjoy spectacular scenery in crystal-clear air.
Viewing Lake Ikawa from Prefectural Forest
On the north side of Lake Ikawa is the “Prefectural Forest,” which features an observation point offering panoramic views of the entire lake. The view from here, overlooking Lake Ikawa and the Southern Alps mountains, is known as a spectacular viewpoint.
Especially during the autumn foliage season, the contrast between variously colored mountains and the blue lake surface is remarkable, attracting many photography enthusiasts.
Access to Lake Ikawa | How to Get There by Car and Public Transportation
Access by Car
Car access is the most convenient way to reach Lake Ikawa.
From Tomei Expressway Shizuoka IC: Approximately 1 hour 50 minutes
- Exit at Shizuoka IC and head north on National Route 362
- Proceed along the Abegawa River and continue toward Ikawa
- Mountain roads follow, so careful driving is necessary
Precautions:
- During winter (December–March), snow and icing are possible, requiring studless tires or chains
- Some sections have narrow roads; pay attention to oncoming traffic
- It is recommended to refuel before reaching the Ikawa area
Access by Public Transportation
Using public transportation, the route is as follows:
- Board the Shizutetsu Bus “Abe Line” from JR Shizuoka Station heading to “Kamiochiai” (final stop)
- Transfer to the Ikawa Self-operated Bus at “Kamiochiai” (reservation required)
- Head toward Lake Ikawa
Ikawa Self-operated Bus Reservation:
- Phone number: 054-260-2377 (Ikawa Tourism Association)
- Prior reservation is required
- Limited service frequencies, so early reservation is recommended
Tourist Attractions Around Lake Ikawa
Lake Ikawa Ferry
A ferry operates across Lake Ikawa. Riding the boat and viewing the Southern Alps mountains from the lake offers spectacular scenery from a different angle than from land.
The ferry service began as transportation to villages that were submerged before Ikawa Dam construction; it is now a popular activity for tourists.
Meiji-Era Tunnel
Red brick tunnels built during the Meiji period remain in the areas surrounding Lake Ikawa. These historically valuable tunnels preserve the civil engineering technology of that era.
They can be seen during exploration of the Abandoned Railway Trail, enhancing the nostalgic atmosphere.
Ikawa Honmura Settlement
Around Lake Ikawa is the Ikawa Honmura settlement, where traditional mountain village life remains. Tea fields and mountainside settlements preserve traditional landscapes of Shizuoka’s mountainous regions, offering leisurely time.
Local cuisine made from local ingredients and “Ikawa Tea,” a specialty of the Ikawa area, are also available.
Ways to Enjoy Lake Ikawa | Recommended Ways to Spend Your Time
Lakeside Stroll and Hiking
Lakeside strolling centered on the Abandoned Railway Trail is a must-do activity when visiting Lake Ikawa. The 8-kilometer course can be walked partially to suit your fitness level.
Recommended Courses:
- Beginner: Ikawa Daibutsu ~ Dream Suspension Bridge (round trip approximately 2 hours)
- Intermediate: Ikawa Daibutsu ~ Ikawa Honmura (one way approximately 3 hours)
Comfortable shoes and season-appropriate clothing are recommended.
Photography Spots
Lake Ikawa is a treasure trove for photography enthusiasts.
Recommended Photography Points:
- Lake surface and mountains from the Dream Suspension Bridge
- Collaboration of Ikawa Daibutsu and lake
- Lake landscape viewed from inside the abandoned railway tunnel
- Lake surface reflection during autumn foliage season
- Overall view from Prefectural Forest
Early morning and dusk offer particularly beautiful light, so visiting with time to spare is recommended.
Autumn Foliage Viewing Drive
The area around Lake Ikawa during autumn is also known as a scenic foliage driving route. The road leading to Lake Ikawa is itself beautiful with autumn colors along the Abegawa River.
Several parking spaces line the lakeshore, allowing you to stop where the scenery appeals to you and enjoy the foliage leisurely.
Accommodations Around Lake Ikawa
Accommodations in Ikawa Area
Around Lake Ikawa are private lodges and mountain lodge-style accommodations. Many offer cuisine using local ingredients and provide environments where you can relax in quiet mountain surroundings, allowing you to refresh away from city hustle and bustle.
Lodging Benefits:
- Lakeside strolls in the clear morning air
- Nighttime stargazing (with minimal light pollution, you can see a starry night sky)
- Enjoying local traditional cuisine
Hotels in Shizuoka City
If day visits are difficult or you prefer more comfortable accommodations, staying at a hotel in Shizuoka City and visiting Lake Ikawa for the day is also a good option. Many hotels surround Shizuoka Station, and you can also visit other tourist attractions in Shizuoka City the next day.
Precautions and Best Season for Visiting Lake Ikawa
Things to Note When Visiting
Clothing and Equipment:
- Comfortable walking shoes (trekking shoes recommended)
- Season-appropriate warm clothing (temperature is lower than in urban areas due to high elevation)
- Sunscreen and hat (summer)
- Rain gear (mountain weather changes rapidly)
Safety:
- Mobile phone signals may not reach in some areas
- Be cautious of wildlife such as bears (carrying a bell is recommended)
- Avoid traveling alone; group travel is safer
Facility Information:
- Restrooms and shops are limited, so prepare in advance
- Bring meals or use dining establishments in the Ikawa area
Best Season
Autumn Foliage Season (late October–early November): The most popular period. Weekends may be crowded.
Fresh Green Season (May–June): Lush greenery, relatively uncrowded hidden gem period.
Summer Season (July–August): Comfortable as a summer retreat. However, summer vacation periods may be crowded.
Winter Season (December–March): Snow scenery is beautiful, but be cautious of road conditions. Some facilities may close during winter.
Basic Information About Lake Ikawa
Address: 〒428-0504 Ikawa 964, Aoi Ward, Shizuoka City, Shizuoka Prefecture
Phone Number: 054-260-2377 (Ikawa Tourism Association)
Access:
- Car: Approximately 1 hour 50 minutes from Tomei Shizuoka IC
- Public Transportation: Bus connection from JR Shizuoka Station (reservation required)
Parking: Available (free)
Admission: Free
Viewing Hours: No restrictions (nighttime visits not recommended due to lack of streetlights)
Inquiries: Ikawa Tourism Association 054-260-2377
Conclusion | Savor the Great Nature of the Southern Alps at Lake Ikawa
Lake Ikawa is a spectacular destination showcasing Shizuoka’s Southern Alps. This beautiful artificial lake born from Japan’s first hollow gravity dam, a nostalgic walking path utilizing abandoned railway tracks, seasonal natural beauty, and the mystical Ikawa Daibutsu are packed with attractions.
Particularly, the sight of mountains reflected on the lake’s surface during the autumn foliage season is an unforgettable spectacle etched in the hearts of many visitors. Although only about two hours by car from central Shizuoka, Lake Ikawa offers an experience of pristine wilderness like another world, making it an ideal tourist destination for those seeking refreshment away from daily life.
Please see for yourself the lake surface of Lake Ikawa reflecting the abundant blessings of the Southern Alps. A peaceful time awaits, where you can forget the hustle and bustle of the city.
