Yakushima Minamiura-dake Flowing Water, Kagoshima Prefecture | A Guide to the Kyushu’s Highest Peak Clear Stream Selected as One of Japan’s Top 100 Waters
The UNESCO World Natural Heritage site of Yakushima Island in Kagoshima Prefecture is home to the “Yakushima Minamiura-dake Flowing Water,” which has been selected as one of Japan’s Top 100 Waters. Originating from Minamiura-dake (elevation 1,936m), Kyushu’s highest peak, the clear stream nurtured by primordial forests is a precious water resource supporting the island’s entire ecosystem. This article provides a detailed explanation from the characteristics of this famous water to practical visiting methods.
What is Yakushima Minamiura-dake Flowing Water?
Yakushima Minamiura-dake Flowing Water is one of the “Top 100 Waters” selected by the Environmental Agency (now the Ministry of the Environment) in 1985. Rather than referring to a specific spring or single river, this famous water refers to multiple rivers collectively that flow from the mountainous areas of Yakushima, centered on Minamiura-dake as the main peak.
Value as One of Japan’s Top 100 Waters
Yakushima Minamiura-dake Flowing Water was selected as one of Japan’s Top 100 Waters due to its pure water quality and abundant volume. By passing through primordial forests with minimal human influence, it maintains clean water quality containing almost no organic matter. It is highly evaluated as water with a soft mouthfeel and excellent mineral balance.
Geographic Characteristics of Minamiura-dake and Yakushima
Kyushu’s Highest Peak
Minamiura-dake boasts an elevation of 1,936 meters, making it the highest peak in the Kyushu region and the southwestern islands. Located near the center of Yakushima Island, it has a steep mountainous appearance also called the “Alps floating on the sea.” It is one of Japan’s Top 100 Mountains and the third highest peak in western Japan, following Mount Ishizuchi (1,982m) in Ehime Prefecture and Mount Tsurugi (1,955m) in Tokushima Prefecture.
Mountain Range around Yakushima
The mountains representing Yakushima are arrayed around Minamiura-dake. Nagata-dake (1,886m) is a steep mountain adjacent to Minamiura-dake, and together with Kurumi-dake (1,867m) and Kuromimi-dake (1,831m), they form the Three Peaks of Yakushima. These mountains are part of the core area of the World Natural Heritage and serve as a treasure trove of precious alpine plants.
The Miraculous Precipitation Creating Water Circulation
An Island Where “It Rains 35 Days a Month”
Yakushima is a region where it is said to “rain 35 days a month.” The annual precipitation exceeds 4,000mm on the plains and over 5,000mm in the mountainous areas, making it one of Japan’s heaviest rainfall regions. This abundant precipitation sustains the island’s entire water circulation system.
Water Retention Function of Primordial Forest
Yakushima cedar trees with ages exceeding one thousand years and the primordial forest spanning from 700m to 1,700m elevation function like a giant sponge. By retaining massive amounts of rainwater and allowing it to slowly seep underground, they maintain stable water volume throughout the year. This natural damming function becomes the source of the clear flowing water.
Rivers Forming Yakushima Minamiura-dake Flowing Water
Major River System
Yakushima Minamiura-dake Flowing Water is composed of 6 main streams and over 100 tributary streams. Rivers flowing down the steep terrain are characterized by abundant water volume and clear water quality.
Major Rivers:
- Anbou River (Anbougawa): Yakushima’s largest river, originating from the eastern slopes of Minamiura-dake. With a drainage basin of approximately 51 square kilometers, it flows through the eastern part of the island and empties into the Pacific Ocean.
- Minamiura River: Flowing from the northern slopes of Minamiura-dake, it passes through the Minamiura settlement and reaches the sea. It is also used as domestic water for the settlement.
- Koageko River (Koagekogawa): A clear stream flowing down the western side of Minamiura-dake, characterized by scenic steep gorges.
These rivers all have short courses and steep gradients, resulting in rapid water flow that constantly supplies fresh water.
Formation of Waterfalls
The steep terrain and abundant water volume create numerous waterfalls. In particular, Oigono Falls (Oigono-no-taki) boasts a drop of 88 meters and is the largest waterfall on Yakushima, selected as one of Japan’s Top 100 Waterfalls. Throughout the island, visitors can enjoy grand waterfall scenery such as Senpin Falls and the Hiryu Falls at Shiratani Unsuikyo.
Water Quality Characteristics and Components
Pure Soft Water with High Purity
The greatest characteristic of Yakushima Minamiura-dake Flowing Water is its purity. Passing through granite-quality geology, it becomes soft water with low hardness while containing appropriate mineral content. It is characterized by containing almost no organic matter and having extremely high transparency.
Soft Mouthfeel
Many visitors consistently comment on the water’s “softness.” The sensation when it touches the tongue is smooth and easy to drink. This characteristic makes it suitable for cooking and beverages, and it has been carefully utilized as domestic water by locals since ancient times.
Water Collection Sites and Access Information
Major Water Collection Sites
Multiple locations for collecting the famous water are set up throughout Yakushima.
Representative Water Collection Sites:
- Water Collection Site along Anbou River: A water collection site developed near Anbou settlement, easily accessible. It also has parking space and is a popular spot with tourists.
- Around Minamiura Settlement: There are several water collection points within the settlement, also used by local residents.
- Near Shiratani Unsuikyo Entrance: There is a place to collect water from the clear stream near Shiratani Unsuikyo, which serves as the starting point for trekking.
Precautions When Collecting Water
- Prepare containers in advance (plastic bottles, poly tanks, etc.)
- When drinking raw water, it is at your own responsibility
- For environmental protection, be careful not to pollute the surroundings
- When collecting large amounts, be considerate not to interfere with local residents’ use
Trekking to Minamiura-dake
Overview of Climbing Routes
Climbing Minamiura-dake is a valuable opportunity to visit the source of the famous water. The main routes are as follows:
Yodogawa Trailhead Route (Most Common):
- Elevation gain: Approximately 1,200m
- Round-trip course time: Approximately 10 hours
- Difficulty: Intermediate
- Features: Relatively gentle, passing through high moorlands such as Hananonoe and Kohananonoe
Arakawa Trailhead Route:
- Elevation gain: Approximately 1,300m
- Round-trip course time: Approximately 11 hours
- Difficulty: Intermediate to Advanced
- Features: Can be combined with routes passing Jomon Sugi
Climbing Preparation and Precautions
Climbing Minamiura-dake is a challenge to Kyushu’s highest peak. Thorough preparation is necessary.
Required Equipment:
- Hiking boots (with high waterproofing)
- Rain gear (separate top and bottom)
- Insulating clothing (temperatures are low near the summit)
- Headlamp
- Map and compass (GPS also recommended)
- Sufficient water and trail snacks
Climbing Precautions:
- Be alert to sudden weather changes (especially afternoon thunderstorms)
- Avoid solo climbing; climb with experienced companions if possible
- Don’t forget to submit a climbing notice
- Consider using a mountain hut (such as Shin-takatuka Hut)
Spectacular Views from the Summit
On clear days, a 360-degree panorama spreads from the summit. To the north, you can see Mount Kaimen and the Osumi Peninsula, to the east Tanegashima, to the south the Tokara Islands, and to the west Kuchinoerabu Island and the Satsuman Islands. The summit’s first-class triangulation point is a popular photo spot for many climbers.
Specialty Products Using Famous Water
Mineral Water
Several manufacturers sell mineral water using Yakushima Minamiura-dake Flowing Water. Available under brands such as “Yakushima Jomon Water” and “Yakushima Water,” they can be purchased throughout and outside the island. Known as water from a World Natural Heritage site, it is popular as a souvenir.
Local Sake and Shochu
Clear water is ideal for sake brewing. Named sake such as “Yakushima Daishizennrin” uses this famous water as brewing water. Characterized by the unique aroma of sweet potato shochu and a mellow mouthfeel, it has become a signature specialty product of Yakushima.
Other Specialty Products
- Yakushima Tea: Tea leaves cultivated with clear water possess a unique flavor
- Tofu: Tofu made with famous water brings out the natural sweetness of soybeans
- Buckwheat Noodles: Hand-made soba noodles use famous water, praised for its smooth throat feel
Yakushima as a World Natural Heritage Site
World Heritage Registration in 1993
Yakushima was registered as a UNESCO World Natural Heritage site in 1993, becoming Japan’s first such designation (alongside Shirakami Sanchi). The reason for registration is the value of primordial natural forests containing Yakushima cedar trees thousands of years old and the ecosystem with diverse vegetation in vertical distribution from subtropical to cool temperate zones.
Ecosystem Supported by Water
Yakushima Minamiura-dake Flowing Water is an important element supporting this rich ecosystem. The clear streams are home to many endemic and rare species, and wild animals such as Yaku sika deer and Yaku monkeys gather at the waterside. Water quality conservation is essential to maintaining the value of the World Natural Heritage.
Environmental Conservation Efforts
Water Quality Conservation Activities
Kagoshima Prefecture and Yakushima Town conduct various conservation activities to maintain the water quality of the famous water. Continuous efforts include periodic water quality surveys of rivers, surveillance against illegal dumping, and afforestation activities.
Sustainable Tourism
With approximately 300,000 annual visitors to Yakushima, the balance between tourism and environmental conservation is a challenge. Efforts are being made to minimize the burden on nature through measures such as mountain access restrictions and guide system implementations. Individual visitor environmental awareness is also important.
Access to Yakushima
Access Methods to the Island
Airplane:
- Approximately 35 minutes from Kagoshima Airport to Yakushima Airport
- Direct flights also available from Itami Airport and Fukuoka Airport (seasonal operations)
High-speed Ferry:
- Approximately 2 hours from Kagoshima Main Port to Minamiura Port or Anbou Port
- Multiple daily departures (may be canceled due to weather)
Ferry:
- Approximately 4 hours from Kagoshima Main Port to Minamiura Port
- 1-2 daily departures
Movement Within the Island
Car rental is most convenient, but bus lines and taxis are also available. Car rental is recommended for access to major water collection sites and trailheads.
Best Season to Visit
Seasonal Characteristics
Spring (March to May):
- Beautiful new green foliage, suitable season for climbing
- Yakushima rhododendrons and other flowers bloom
- Relatively lower precipitation
Summer (June to August):
- Rainy season with extremely high precipitation
- Waterfall water volume reaches maximum, creating dramatic scenery
- Heat is milder than mainland
Autumn (September to November):
- Autumn foliage season (late October to November)
- Typhoon season, requiring caution
- Clear air provides excellent views from the summit
Winter (December to February):
- Snow and freezing possible near the summit
- Winter pressure pattern results in high clear-sky rate
- Full winter mountaineering equipment necessary
Summary
Yakushima Minamiura-dake Flowing Water, originating from Minamiura-dake, Kyushu’s highest peak, and nurtured by the primordial forests of a World Natural Heritage site, is one of Japan’s most representative famous waters. Abundant annual precipitation exceeding 5,000mm and a natural environment with minimal human influence create clear and plentiful water.
The river system formed by six main streams including Anbou River and over one hundred tributary streams is the lifeline supporting Yakushima’s ecosystem, and its pure water quality deserves the recognition of being selected as one of Japan’s Top 100 Waters.
Visitors can actually taste this famous water at multiple collection sites throughout the island, and can also touch the water’s source by climbing Minamiura-dake. The blessings of this famous water can also be taken home through specialty products such as mineral water and local sake.
Maintaining the value of the World Natural Heritage requires consideration for environmental conservation. When visiting, approach nature with respect and practice sustainable tourism. Yakushima Minamiura-dake Flowing Water is a precious natural resource of Japan to be passed down to future generations.