A Complete Guide to Visiting the Chikusa River Source | The Beginning of Hyogo Prefecture’s Clear Stream and Natural Charm
The Chikusa River (ちくさがわ) is a first-class river flowing through western Hyogo Prefecture, known for its clear water quality and rich natural environment. This article provides detailed information about the Chikusa River’s source region, including its geographical features, access methods, surrounding natural environment, and historical background.
The Chikusa River | Basic Information and Watershed Characteristics
The Chikusa River is a first-class river approximately 67 km long flowing through the southwestern part of Hyogo Prefecture. It originates in the mountainous areas of Shiso City (しそうし) in Hyogo Prefecture, near the border with Okayama Prefecture, passes through Sayo Town and Kamigori Town, and flows into the Seto Inland Sea (Harima Nada) at Ako City.
Overview of the Chikusa River Water System
The Chikusa River water system boasts a drainage basin area of approximately 785 square kilometers and serves as an important water source for western Hyogo Prefecture. Approximately 80,000 people live in the basin and use the water for agricultural and domestic purposes.
Key Data for the Chikusa River:
- River length: 67.6 km
- Drainage basin area: approximately 785 km²
- Water system: Chikusa River water system (first-class river)
- Source elevation: approximately 700 m
- River mouth: Harima Nada, Ako City, Hyogo Prefecture
Although the Chikusa River was not selected for the “100 Select Waters of Japan,” its clear stream is cherished locally as “the clear stream of the Chikusa River” and even made it as a candidate when the Ministry of the Environment selected the “100 Select Waters of the Heisei Era” due to its water quality.
Location of the Chikusa River Source | Shiso City, Hyogo Prefecture
The source of the Chikusa River is located in the mountainous areas of Chikusa Town (ちくさちょう), Shiso City, Hyogo Prefecture. Shiso City is situated in the central-western part of Hyogo Prefecture, at the northernmost part of the Harima region, with approximately 90% of its area covered by forests, making it a natural and rich area.
Geographical Features of the Source Region
The source of the Chikusa River is located near the Mimuro Plateau in Chikusa Town, Shiso City, at an elevation of approximately 700 meters in a mountainous area. This region is at the eastern edge of the Chugoku Mountains and is characterized by terrain covered with lush forests and numerous undulations.
The source region has the following geographical features:
- Abundant forest resources: A mixture of deciduous forests such as Japanese beech and konara oak, and coniferous forests of Japanese cedar and Japanese cypress
- Steep topography: The upper source is steep, forming gorge beauty through water erosion
- Multiple tributaries: Numerous small streams converge in the source region to form the main Chikusa River
- Cool climate: Due to high elevation, relatively cool even in summer, with snowfall in winter
Natural Environment of the Mimuro Plateau and Source Region
The Mimuro Plateau is a highland area located at an elevation of 500-700 meters and serves as the center of the Chikusa River source region. This area is near part of the “Hyonoyama Ushiroyama Naki Quasi-National Park” and preserves a rich natural environment.
The plateau features vast grasslands, with wild grasses blooming from spring to autumn. The surrounding forests serve important roles as water source conservation forests and are the source of the Chikusa River’s clear water quality.
Access to the Chikusa River Source
Access to the Chikusa River source region is most convenient by private vehicle as public transportation is limited.
Access by Car
From the Osaka/Kobe area:
- Go north on National Route 29 from “Yamazaki IC” on the Chugoku Expressway
- Via Shiso City center, head toward Chikusa Town on Prefectural Road 6 (Tottori Shikano Kurayoshi Line)
- Travel time: approximately 2 hours 30 minutes from Osaka, approximately 2 hours from Kobe
From the Okayama area:
- Go north on National Route 179 from “Sayo IC” on the Chugoku Expressway
- Head toward Chikusa Town
- Travel time: approximately 1 hour 30 minutes from Okayama City
From the Himeji area:
- Go north on National Route 29 via Shiso City toward Chikusa Town
- Travel time: approximately 1 hour 30 minutes from Himeji Station
Access by Public Transportation
When using public transportation:
- Travel to “Senbon Station” or “Harima Tokukustation” on the JR Hama-Shin Line
- From there, use a community bus or taxi
- However, as there are no bus routes to the deepest parts of the source region, renting a car is recommended
Parking and Precautions
There are parking spaces around the Mimuro Plateau, but there are no well-maintained parking lots at the deepest parts of the source region. It is necessary to park in a safe location along the forest road.
Points to note when visiting:
- During winter (December-March), the forest road may be closed due to snow
- Mobile phone signals may not reach some areas
- There are reports of bear sightings, so bring bear deterrent items such as bells
- As this is a water source area, be mindful of environmental conservation and always take your trash with you
Nature and Ecosystem of the Chikusa River Source Region
The Chikusa River source region is one of the most natural environments remaining in Hyogo Prefecture. Let’s explore the diverse ecosystems nurtured by rich forests and clear water.
Vegetation of the Source Region
At an elevation of around 700 meters in the source region, vegetation is found in the transition zone from cool-temperate to warm-temperate zones.
Main tree species:
- Deciduous trees: Japanese beech, konara oak, oriental oak, Japanese chestnut, wild cherry
- Coniferous trees: Japanese cedar, Japanese cypress, fir, tsuga hemlock
- Shrubs and herbaceous plants: Bamboo grass varieties, fern species, various alpine flowers
Spring brings mountain cherries and Japanese spiraea, early summer brings mountain hydrangea and deutzia, and autumn brings beautiful fall foliage, offering different scenery throughout the seasons.
Animal Life of the Source Region
The Chikusa River source region is home to diverse wild animals.
Mammals:
- Asiatic black bear, sika deer, wild boar
- Japanese serow, raccoon dog, red fox
- Japanese squirrel, flying squirrel
Birds:
- Crested kingfisher, common kingfisher, blue-and-white flycatcher
- Japanese paradise flycatcher, three-streaked flycatcher
- Golden eagle, northern goshawk and other raptors
Amphibians and reptiles:
- Moor frog, kajika frog
- Mountain brown frog, silver frog
- Yamakagashi snake, grass snake
Aquatic Life of the Source Region
The clear stream of the Chikusa River source is home to aquatic organisms that prefer clean water.
Fish:
- Yamame (land-locked cherry salmon)
- Amago (land-locked chum salmon)
- Iwana (Japanese char)
- Kajika
Aquatic insects:
- Stonefly species
- Flat mayfly species
- Caddisfly species
These aquatic insects are important as water quality indicator organisms, and their presence attests to the clean water quality of the Chikusa River source.
Water Quality and Environmental Conservation of the Chikusa River
The Chikusa River is known as a river with particularly good water quality in Hyogo Prefecture.
Water Quality Characteristics of the Chikusa River
The water quality of the Chikusa River consistently receives high ratings in water quality surveys by the Ministry of the Environment and Hyogo Prefecture.
Characteristics of water quality:
- High transparency, allowing visibility of stones on the river bottom
- Low BOD (biochemical oxygen demand), maintaining water quality class I (most excellent)
- Low water temperature in the source region, approximately 15-18 degrees Celsius even in summer
- Well-balanced mineral soft water
The clear water quality of the Chikusa River is produced by the “green dam” effect of the rich forests in the source region. Forests slowly infiltrate rainwater and filter it as it flows out as groundwater, maintaining stable water volume and quality throughout the year.
Environmental Conservation Activities
In the Chikusa River basin, local residents, government agencies, NPOs, and others cooperate in environmental conservation activities.
Main conservation activities:
- River cleanup activities: Regular river cleaning to remove trash and beautify the environment
- Water quality monitoring: Continuous monitoring through citizen-participatory water quality surveys
- Forest conservation: Appropriate management of water source conservation forests and thinning work
- Invasive species countermeasures: Removal of invasive fish such as largemouth bass
- Environmental education: River learning programs for elementary and middle school students
Organizations such as the local “Chikusa River Basin Clear Water Creation Committee” are leading efforts to pass “clear stream Chikusa River” to the next generation.
History and Culture of the Chikusa River Source Region
The Chikusa River basin has been deeply connected to people’s lives since ancient times.
Origins of the Place Name
There are several theories about the origin of the place name “Chikusa” (千種):
- Plant theory: Named “Chikusa” (many varieties) because many diverse plants grow there
- Mine theory: Due to a former Chikusa Iron Mine, named after the many varieties of minerals produced
- Ancient language theory: “Chikusa” derives from an ancient word meaning “many”
The most reliable theory is the mine theory, as Chikusa Town had a “Chikusa Mine” that operated from the Edo period to the early Showa period. This mine produced silver, copper, lead, zinc, and other minerals, supporting the regional economy.
History of Chikusa Iron Production
The Chikusa region has long been known for “tatara” (traditional Japanese iron smelting). This is due to the abundant forest resources in the Chugoku Mountains (charcoal source), high-quality iron sand, and abundant water resources.
History of tatara iron smelting:
- Said to have been conducted since the Heian period
- Iron production for weapon manufacturing flourished during the Sengoku period
- Organized iron production under Himeji Domain control during the Edo period
- Declined after the Meiji period due to modern iron smelting
Tatara iron smelting required large amounts of charcoal, significantly impacting surrounding forest resources. The current rich forests are secondary growth that regenerated after the decline of iron production.
Culture of Water and Living
The clear waters of the Chikusa River have nurtured the living culture of basin inhabitants.
Traditional water use:
- Agricultural use (water intake to terraced fields)
- Domestic water use (laundry spots, drinking water)
- Water wheels for rice polishing and flour grinding
- River fish fishing (sweetfish, yamame, etc.)
Today, the wisdom of coexisting with rivers continues to be passed down in the Chikusa River basin.
Best Seasons for Exploring the Chikusa River Source and Ways to Enjoy It
If you visit the Chikusa River source region, you should know the charms of each season.
Spring (April-May)
Highlights:
- Mountain cherry blossoms (mid-to-late April)
- Fresh green foliage budding
- Wild flower blooms (fritillaria camschatcensis, epimedium, etc.)
- Beginning of trout fishing season
Points to note:
- High water volume from snowmelt, with low water temperature
- Confirm when forest roads open from winter closure
Early Summer (June-July)
Highlights:
- Deep green forests
- Firefly swarming (mid-to-late June)
- Bird songs
- Cool freshness of clear streams
Points to note:
- Risk of flooding during rainy season
- Need insect countermeasures for mosquitoes and horseflies
Summer (August)
Highlights:
- Cool mountain resort atmosphere
- River play and trout fishing
- Summer alpine flowers
Points to note:
- Increased visitors during summer vacation
- Afternoon thunderstorms possible
- Heat stroke prevention and adequate water intake
Autumn (September-November)
Highlights:
- Beautiful fall foliage (late October-early November peak)
- Clear air and clear stream contrast
- Fall trout fishing
- Mushroom picking (for those with knowledge)
Points to note:
- Dress for morning and evening chill
- Early sunset, requiring early departure
Winter (December-March)
Highlights:
- Snow-covered source region landscape
- Winter forest in silence
- Frozen waterfalls (ice falls)
Points to note:
- Forest roads often closed due to snowfall
- Winter gear (studless tires, chains) essential
- Avoid attempting to enter without full winter mountain equipment
Recommended Ways to Enjoy
1. Source Stream Trekking
Adventure trekking through forest roads and mountain trails in the source region to discover the beginning of the Chikusa River. Appropriate equipment, maps, and compass or GPS are necessary.
2. Trout Fishing
Trout fishing targeting yamame and amago is a popular activity. Fishing rights and fishing permits must be purchased.
3. Nature Observation
Observation of birds, insects, plants, etc. Binoculars and cameras add to the enjoyment.
4. Photography
Subjects abound: clear streams, forests, wildlife. Early morning light and fall foliage season are prime photo opportunities.
5. Forest Bathing
Leisurely time spent in the rich forests of the source region is ideal for refreshing mind and body.
Tourist Spots Around the Chikusa River Source Region
When visiting the Chikusa River source region, nearby tourist spots can also be enjoyed.
Mimuro Plateau
The tourist spot closest to the Chikusa River source. A highland at 500-700 meters elevation with beautiful grasslands from spring to autumn, ideal for hiking. It operates as a ski resort in winter.
Chikusa Kogen
A resort facility adjacent to Mimuro Plateau. It has accommodations, restaurants, and hot spring facilities, making it convenient as a base for source exploration.
Chikusa Hot Spring
A hot spring near the source region. Known as a therapeutic hot spring with high radon content, ideal for soothing tired bodies.
Hara Fudo Falls
A famous waterfall with a drop of 88 meters in Hago Town, Shiso City. While not in the Chikusa River water system, it is in the same Shiso City and was selected for “100 Famous Waterfalls of Japan.”
Akanishi Gorge
A beautiful gorge in Shiso City. Famous as a fall foliage destination, attracting many tourists in autumn.
Michi-no-Eki “Harima Ichinomariya”
A roadside station along National Route 29. Local agricultural products and specialties can be purchased. Convenient to stop on the way to the Chikusa River source.
Safety Measures and Equipment for the Chikusa River Source Region
The source region is mountainous and requires proper preparation and safety measures.
Necessary Equipment
Basic equipment:
- Trekking shoes or mountaineering boots
- Comfortable clothing (quick-drying)
- Rain gear (separate top and bottom)
- Hat, gloves
- Backpack (20-30 liters)
Safety equipment:
- Map and compass (or GPS)
- Headlamp (with spare batteries)
- First aid kit
- Bear bell, bear repellent spray
- Whistle (for emergencies)
Other items:
- Sufficient drinking water (1 liter or more)
- Trail snacks (rice balls, chocolate, etc.)
- Towel, tissues
- Trash bag
- Mobile phone (with spare battery)
- Camera, binoculars (optional)
Safety Precautions
1. Prior preparation
- Always check the weather forecast
- Plan your itinerary and inform family or friends
- Check for local latest information (forest road conditions, etc.)
2. Bear countermeasures
- Ring a bear bell while walking
- Avoid early morning and evening solo travel
- Be mindful of food odors
- If encountering a bear, retreat quietly without panic
3. Water accident prevention
- Stay away from rivers during flooding
- Be careful on slippery rocks
- Cross streams in safe locations carefully
4. Getting lost prevention
- Always verify your current location
- Have the courage to turn back on unclear trails
- Descend well before sunset
5. Emergency response
- If mobile signals fail, move to high ground or open area
- If injured, don’t push and request rescue
- Shiso City Fire Department: 0790-62-0119
Highlights of the Chikusa River’s Middle and Lower Reaches
After visiting the source, explore the middle and lower reaches of the Chikusa River.
Around Sayo Town (Middle Reaches)
Located in the middle reaches of the Chikusa River, Sayo Town sees the river widen and flow becomes gentler.
Highlights:
- Sayo Town strolls
- Sasaoka Park (cherry blossom spot)
- Hirafuku Lodging Town (Inaba Kaido lodge town)
- River play spots
Around Kamigori Town (Middle to Lower Reaches)
Highlights:
- Shirohata Castle Ruins (Akamatsuclan fortress)
- Ooyoke Shrine (ancient shrine connected to the Hata clan)
- Enkoji Temple (mountain temple)
Around Ako City (Lower Reaches)
At the river mouth of the Chikusa River, the river widens further and becomes brackish.
Highlights:
- Ako Castle Ruins (famous from the 47 Ronin story)
- Ako Misaki (Seto Inland Sea views)
- Ako Seaside Park
- Chikusa River Estuary tidal flats (bird observation)
Tracing the Chikusa River from source to mouth allows you to enjoy the river’s diverse faces.
Local Specialties and Cuisine of the Chikusa River Basin
The Chikusa River basin has specialty products nurtured by clear streams and rich nature.
River Fish of the Chikusa River
Sweetfish (Ayu)
Chikusa River sweetfish are known as “Chikusa River ayu,” characterized by firm flesh and good aroma from growth in clear streams. Enjoyed as salt-grilled, candied, or fried preparations.
Yamame and Amago
Yamame and amago caught in the source region are prized for their beautiful appearance typical of trout species and delicate flavor.
Specialties of Shiso City
Shiso Sanpo (Shiso beef, Shiso rice, mochi soybeans)
- Shiso beef: High-quality wagyu beef with Tajima cattle bloodlines
- Shiso rice: High-quality rice grown in cool climate and clear streams
- Mochi soybeans: Large-grained sweet-flavored heritage soybeans
Mountain vegetables and mushrooms
Abundant spring vegetables (warabi, zenmai, taranome, etc.) and autumn mushrooms (matsutake, shimiji, etc.).
Specialties of Sayo Town
Sayo Mochi Soybeans
Large-grained soybeans unique to Sayo Town. Processed into boiled beans, miso, tofu, etc.
Sunflower Oil
Sayo Town is famous for summer sunflower fields. Sunflower oil pressed from sunflower seeds is a specialty.
Specialties of Ako City
Ako Salt
Ako has been a salt production area since the Edo period. The clear waters of the Chikusa River have nurtured Ako’s salt fields, supporting high-quality salt production.
Ako Oysters
The nutrients carried by the Chikusa River nurture rich seas producing delicious oysters.
Conservation and Future Prospects of the Chikusa River Source
Various initiatives are underway to pass the Chikusa River’s clear water to the future.
Basin-Wide Initiatives
Chikusa River Basin Conference
Participated by the Ministry of Land, Infrastructure, Transport and Tourism, Hyogo Prefecture, basin municipalities, and resident representatives, discussing river improvements and environmental conservation.
Clear Water Creation Ordinance
Hyogo Prefecture enacted the “Hometown Rivers Ordinance” to promote environmental conservation of rivers including the Chikusa River throughout the prefecture.
Forest Conservation of Source Region
The forests of the source region serve as the “green dam” protecting the water quality and volume of the Chikusa River. Maintaining water source conservation functions through proper forest management is important.
Initiatives:
- Forest health improvement through thinning
- Conservation and development of deciduous forests
- Wildlife damage countermeasures (preventing deer damage)
- Forest volunteer activities
Environmental Education and Succession to Next Generation
Environmental education using the Chikusa River as subject matter is conducted in elementary and middle schools throughout the basin.
Educational programs:
- River organism surveys
- Water quality survey experience
- Forest experience learning
- River cleanup activities
Through such activities, children are expected to develop interest in regional natural environments and cultivate conservation awareness.
Sustainable Tourism
The beautiful nature of the Chikusa River source region is also a tourism resource, but excessive tourism development can lead to environmental destruction.
Promotion of ecotourism:
- Small-group guided tours
- Recommendation of low-impact activities
- Contribution to regional economy
- Raising environmental conservation awareness
When each visitor takes care to consider environmental impact, we can preserve this beautiful source for future generations.
Conclusion: The Charm of the Chikusa River Source and Recommendation to Visit
The Chikusa River source is the beginning of a clear stream surrounded by rich nature in the mountainous areas of Shiso City, Hyogo Prefecture. Originating near the Mimuro Plateau at an elevation of approximately 700 meters, it travels 67 kilometers before flowing into the Seto Inland Sea.
The charm of the source region lies above all in its clear water and rich natural environment. Mountains covered with beech and oak forests, trout living in clear streams, and beautiful landscapes changing with the seasons captivate visitors.
Access is most convenient by private vehicle, taking approximately 2 hours from Osaka or Kobe, and about 1 hour 30 minutes from Himeji. The best seasons to visit are spring with new green foliage, cool early summer, and autumn with fall colors, though each season has its own appeal.
When visiting the source region, appropriate equipment and safety measures are necessary. Prepare trekking shoes, rain gear, maps, bear bells, and others, and plan a realistic itinerary matching weather and physical condition.
The clear waters of the Chikusa River have been protected through the efforts of basin residents. Visitors should also care for the environment, remembering to take trash with them and show respect for nature, passing this beautiful source to the next generation.
The Chikusa River source, a hidden gem in western Hyogo Prefecture. A journey departing from urban hustle to discover where clear water begins will surely be a memorable experience. Feel the story woven by nature’s blessings and human activity in the source region changing through the four seasons.
