Tanzawa Lake (Kanagawa Prefecture) Complete Guide｜The Charm and How to Enjoy an Artificial Lake Created by the Miho Dam
Tanzawa Lake, which spreads across Yamakita Town in the northwestern part of Kanagawa Prefecture, is a beautiful artificial lake where rich nature and modern architecture harmonize. Selected as one of the 50 scenic spots of Kanagawa and one of the 100 dam lakes, this lake captivates many tourists and nature lovers throughout the four seasons. This article provides comprehensive information you should know before visiting, from the history of Tanzawa Lake to tourist spots, access methods, and usage rules.
What is Tanzawa Lake? The Water Source for Kanagawa Prefecture Created by the Miho Dam
Tanzawa Lake was created in 1978 (Showa 53) by the Miho Dam, which was constructed on the Kawachi River in the Sakawa River system. Located in Yamakita Town, Ashigara-kamigun, Kanagawa Prefecture, it receives water from three tributaries in the west Tanzawa area: the Kurokura River (玄倉川), the Yozuku River (世附川), and the Nakagawa River (中川川).
Construction and History of the Miho Dam
Construction of the Miho Dam began in 1970 (Showa 45) and was completed after 8 years and a massive investment of 82.3 billion yen. This dam serves as an important water source for Kanagawa residents, supplying water for domestic use, industrial water, and agricultural water. It also has flood control functions and operates as a multipurpose dam that protects the downstream area from floods.
Despite being an artificial lake, Tanzawa Lake blends remarkably well with the surrounding natural environment and is located in an area designated as the Tanzawa-Oyama Quasi-National Park. The characteristic feature is that the modern architectural beauty of the dam and the bridges spanning the lake make the natural landscape even more attractive.
Basic Information and Access Methods to Tanzawa Lake
Address and Location
Address: Yamakita Town, Ashigara-kamigun, Kanagawa Prefecture
Tanzawa Lake is located in the western part of Kanagawa Prefecture in the Kanto region and is easily accessible from central Tokyo. Yamakita Town is positioned at the westernmost part of Kanagawa Prefecture, near the prefectural border with Shizuoka, in a naturally rich area.
Access by Car
- Via Tomei Expressway: Approximately 40 minutes from Ooimatsu IC via National Route 246 and Prefectural Route 76
- From the Odawara area: Approximately 50 minutes via National Route 255 and Prefectural Route 76
Multiple parking lots have been developed around Tanzawa Lake, and some are free to use. However, parking lots may become congested during tourist season and on weekends, so early arrival is recommended.
Access by Public Transportation
- Train and Bus: Take the Fuji Kyuko Shonan Bus toward “Tanzawa Lake” from JR Gotemba Line “Yage Station” or “Yamakita Station” and get off at the final stop
- Via Odakyu Line: Approximately 60 minutes by Fuji Kyuko Shonan Bus from “Shin-Matsuda Station” on the Odakyu Line
The number of buses is limited, so it is recommended to check the timetable in advance. Particularly on weekdays, the number of services is small, so planned action is necessary.
Tanzawa Lake’s Charm Through the Four Seasons
The greatest charm of Tanzawa Lake is the beautiful scenery it displays with different expressions in each season. It is a tourist destination worth visiting throughout the year and attracts many repeat visitors.
Spring: Season of Fresh Greenery and Cherry Blossoms
In spring, Tanzawa Lake is surrounded by the fresh greenery of the budding mountains around it. Cherry blossoms are planted along the lakeside, and from early to mid-April, you can enjoy beautiful cherry blossom scenery. The contrast between the cherry blossoms and fresh greenery reflected on the lake surface is ideal for photography.
Summer: A Cool Summer Resort
Summer at Tanzawa Lake is popular as a summer resort as temperatures are lower than in the city center. In August, the “Tanzawa Lake Fireworks Festival” is held, and the beauty of fireworks reflected on the lake surface is extraordinary. Many people enjoy camping and hiking along the lakeside, and it serves as a base for outdoor activities.
Autumn: A Famous Location for Autumn Leaves
Tanzawa Lake is considered most beautiful during the autumn foliage season. From late October to mid-November, the surrounding mountains turn red and yellow, and the sight of autumn leaves reflected on the lake surface is breathtaking. In particular, views from Eisai Bridge and Chiyo no Sawa Park are known as spectacular viewpoints.
Events such as “Momiji Matsuri” (maple leaf festival) are also held, attracting many tourists. During the autumn foliage season, parking lots become congested, so using public transportation or visiting early in the morning is recommended.
Winter: A Fantastical World of Snow-Covered Scenery
Winter at Tanzawa Lake offers a fantastical sight of snow-covered mountains and a quiet lake surface. The amount of snow varies from year to year, but when cold waves arrive, the area around the lake transforms into a world of white. Because the air is clear, you can expect views of Mount Fuji on sunny days.
Tourist Spots Around Tanzawa Lake
Tanzawa Lake Memorial Museum (Miho House)
The Tanzawa Lake Memorial Museum is a facility where you can learn about the history of Miho Dam construction and the nature of Tanzawa Lake. It also features exhibits about the history and culture of the Miho district, which was submerged by dam construction, making it a valuable museum for understanding the region’s history. Admission is free, and it is a must-visit spot when you visit Tanzawa Lake.
Eisai Bridge (永歳橋)
The red suspension bridge “Eisai Bridge” spanning Tanzawa Lake is a symbolic presence of the lake. From the bridge, you can see the entire view of the lake, and it becomes an excellent photography spot especially during the autumn foliage season. You can enjoy seasonal scenery while walking across the bridge.
Chiyo no Sawa Park
A park developed on the lakeside with grassy areas and an observation deck. It is ideal for picnics with families and has an environment where children can play safely. From the observation deck, you can see Tanzawa Lake and the surrounding mountains at a glance, enjoying beautiful scenery throughout the four seasons.
Kurokura River Known for Ushin Blue
On the upper reaches of the Kurokura River that flows into Tanzawa Lake, there is a beautiful emerald green stream called “Ushin Blue.” The hiking course to Ushin Gorge is popular, but the trail is steep and requires adequate equipment and experience. Currently, there are sections with traffic restrictions, so please confirm the latest information in advance.
West Tanzawa Natural Classroom
Located on the west side of Tanzawa Lake, the West Tanzawa Natural Classroom is a facility where you can learn about Tanzawa’s nature. Nature observation programs and information about hiking and climbing are also provided, and it is recommended for those who want to learn more deeply about Tanzawa’s nature.
Usage Rules and Precautions for Tanzawa Lake
Tanzawa Lake is a public water source managed by Kanagawa Prefecture, and an ordinance has been established regarding restrictions on activities in water areas including Sagami Lake, Tsukui Lake, Tanzawa Lake, Samukawa Stagnant Water Area, Iizumi Stagnant Water Area, etc. Please follow the following rules when visiting.
Use of the Lake Surface
The following activities are generally prohibited on the lake surface of Tanzawa Lake:
- Use of Motorized Vessels: Use of motorboats, jet skis, and other motorized vessels is generally prohibited
- Swimming: Swimming is prohibited to maintain water quality and ensure safety
- Fishing: Fishing is permitted in some areas, but permission may be required. Please confirm in advance
If the lake surface needs to be used for special reasons, permission from Kanagawa Prefecture is necessary. For details on permission applications, you can check Kanagawa Prefecture’s website.
Use of the Lakeside
The following points require attention regarding lakeside use:
- Camping: Camping outside of designated campgrounds is prohibited
- Barbecue: Use of fire outside of permitted areas is strictly prohibited
- Trash Disposal: For nature conservation, please take all trash with you
- Plant Collection: Plant collection is prohibited for nature conservation purposes
Drone Usage
In recent years, the number of people wanting to shoot drone footage around Tanzawa Lake has increased, but the following points require attention:
- Compliance with Aviation Law: Drone flights are subject to aviation law regulations
- Confirmation with Administrators: Permission from Kanagawa Prefecture may be required for flights around dam facilities
- Respect for Privacy: Be mindful of the privacy of other users in your flights
- Environmental Consideration: Minimize impacts on wildlife
If you plan to fly a drone, it is recommended to contact the Kanagawa Prefectural Enterprise Bureau Water and Electric Power Department Power Generation Division in advance.
Safety Precautions
- Sudden Weather Changes: Weather can change suddenly in mountain areas. Check weather information frequently
- Bear Sightings: Bear sightings have been reported in the surrounding area. Carry a bell or similar device when hiking
- Mobile Phone Signal: In some areas, mobile phone signals may be weak
- Road Freezing in Winter: In winter, roads may freeze, so preparation of studless tires or chains is necessary
Accommodations and Dining Around Tanzawa Lake
Accommodation Facilities
There are various types of accommodations around Tanzawa Lake, including hot spring inns, pensions, and campgrounds:
- Nakakawa Hot Spring: A hot spring area located on the north side of Tanzawa Lake, known for its skin-beautifying waters
- Campgrounds around Tanzawa Lake: Campgrounds are scattered around the lakeside and surrounding forests, allowing you to enjoy outdoor experiences in nature
- Guesthouses and Pensions in Yamakita Town: Many accommodations have a homey atmosphere and offer dishes made with local ingredients
Cuisine and Local Specialties
Yamakita Town has unique local cuisine and specialties:
- Yamakita Tangerines: Sweet tangerines grown in the mild climate are a specialty product
- Tanzawa Soba: Soba made with clear water is fragrant and delicious
- Mountain Vegetable Dishes: In spring, you can enjoy dishes made with wild vegetables harvested locally
- Game Cuisine: Some restaurants serve game dishes made with venison and boar meat
Hiking and Climbing Using Tanzawa Lake as a Base
The area around Tanzawa Lake is located on the western side of the Tanzawa Mountain Range and serves as the starting point for many hiking courses and climbing routes.
Beginner-Friendly Courses
- Lakeside Circumnavigation Course: A flat course that walks around the Tanzawa Lake perimeter with an approximate time of 2 hours
- Chiyo no Sawa Park Exploration: A short course that families can enjoy
Intermediate Level Courses
- Ohno Mountain Hike: A course from Yamakita Station via Ohno Mountain to Yage Station (approximately 4 hours)
- Yozuku Gongen Mountain: A climbing course from Tanzawa Lake to Yozuku Gongen Mountain (round trip approximately 5 hours)
Advanced Level Courses
- Hinoki Bora Maru: A climbing route to a representative peak of west Tanzawa (round trip approximately 7 hours)
- Aze Maru: A full-scale climbing course for experienced hikers
All courses require appropriate equipment and thorough preparation. Do not forget to submit a climbing plan, carry a map and compass, and prepare plenty of water and food.
Event Information at Tanzawa Lake
Various events are held at Tanzawa Lake throughout the year.
Main Events
- Tanzawa Lake Fireworks Festival (August): A summer tradition featuring fireworks beautifully reflected on the lake surface
- Tanzawa Lake Marathon (April): A marathon race along the lakeside with participants from across the country
- Momiji Festival (November): An autumn festival held during the fall foliage season
- Tanzawa Lake Half Marathon (November): A half marathon race where you can enjoy autumn foliage
Event dates and details can be confirmed on Yamakita Town’s official website and tourism association.
Recommended Photography Spots
Tanzawa Lake is also an attractive spot for photography enthusiasts. Kanagawa Prefecture’s website introduces photography spots for the Miho Dam and Tanzawa Lake.
Scenic Photography Points
- View from Eisai Bridge: A classic spot overlooking the entire lake
- Miho Dam Embankment: Modern architectural beauty and dynamic discharge scenes can be photographed
- Chiyo no Sawa Park Observation Deck: A composition that photographs the lake from a high vantage point
- Lakeside Autumn Foliage: In autumn, colorful autumn leaves are reflected on the lake surface
- Early Morning Mist: When conditions are right, fantastical morning mist rising from the lake surface can be photographed
When photographing, do not forget to consider where you place your tripod and be considerate of other tourists, following proper etiquette.
Contact Information
Inquiries regarding Tanzawa Lake and the Miho Dam are handled at the following contact points:
- Kanagawa Prefectural Enterprise Bureau Water and Electric Power Department Power Generation Division: Inquiries regarding dam management and lake surface usage
- Yamakita Town Tourism Association: Inquiries regarding tourism information and event information
- Yamakita Town Hall: General tourism guidance, access information, etc.
It is recommended to check the latest information on the official websites of Kanagawa Prefecture and Yamakita Town.
Conclusion: Fully Enjoy the Charm of Tanzawa Lake
Tanzawa Lake in Yamakita Town, Kanagawa Prefecture, is an artificial lake created by the Miho Dam that blends remarkably well with the surrounding nature and boasts a beautiful landscape. With its fresh greenery in spring, cool summer weather, autumn foliage, and snowy winter scenes, Tanzawa Lake shows different expressions throughout the four seasons, and there are always new discoveries with each visit.
While serving as an important water source for Kanagawa residents, Tanzawa Lake is loved by many as a tourist destination. Located in the Kanto region with easy access from the metropolitan area, yet surrounded by abundant nature, this is an ideal place to refresh yourself away from your daily routine.
When visiting, please follow usage rules and do not forget to be considerate of the natural environment as you fully enjoy the charm of Tanzawa Lake. Whether hiking, photography, driving, or participating in seasonal events, Tanzawa Lake offers various ways to enjoy itself and is sure to create lasting memories in your heart.
