上日川ダム (Kami-Hikawa Dam) – A Hidden Gem in Yamanashi, Japan
Keywords: 上日川ダム, Yamanashi dam, Enzan travel, Japan dam tourism, 白糸の滝, Yamanashi attractions, Japan travel guide
1. Introduction
If you think Yamanashi Prefecture is only about towering mountains, world‑class wineries, and the iconic Fuji‑Five Lakes, think again. Tucked away in the quiet town of Enzan lies 上日川ダム – a modest yet striking dam that offers a peaceful escape from the usual tourist crowds. Whether you’re a photography enthusiast chasing reflective water surfaces, a nature lover eager to explore lesser‑known waterfalls, or simply someone who enjoys a scenic drive through Japan’s countryside, 上日川ダム makes for a rewarding day‑trip stop.
2. About 上日川ダム
A Brief Description
- Name: 上日川ダム (Kami‑Hikawa Dam)
- Type: Dam (🏗️)
- Location: Enzan, Yamanashi Prefecture, Japan
- Coordinates: 35.716498 N, 138.832739 E
The dam sits on the upper reaches of the Hikawa River, a tributary that eventually joins the larger Fuefuki River system. While the exact height and altitude are not publicly listed, the structure blends seamlessly into the surrounding forested hills, creating a calm reservoir that mirrors the sky and the distant peaks of the Yamanashi mountains.
History & Significance
上日川ダム was constructed as part of Yamanashi’s post‑war water‑resource development program. Its primary purpose is to regulate river flow for irrigation, flood control, and local water supply—vital functions for the agricultural communities that dominate the Enzan basin. Over the decades, the dam has also become an informal recreation spot for locals, who fish, picnic, and walk along its banks.
From a broader perspective, the dam illustrates Japan’s meticulous approach to balancing infrastructure with nature. Even though it is not a massive hydroelectric powerhouse, 上日川ダム contributes to the sustainable management of Yamanashi’s water resources, supporting rice paddies, vineyards, and the region’s famous fruit orchards.
3. How to Get There
By Train
- Start at Tokyo or Nagoya: Take the JR Chūō Line (Rapid) from Shinjuku or Tokyo Station to Kōfu Station (≈2 h).
- Transfer to the JR Chūō Main Line: From Kōfu, board a local train bound for Enzan Station (≈30 min).
From Enzan Station
- Taxi: The most convenient option is a short 5‑minute taxi ride (≈2 km) directly to the dam’s parking area.
- Bus: Local community buses run a limited service toward the “Kami‑Hikawa Dam” stop. Check the Enzan municipal website for the latest timetable.
By Car
If you prefer driving, rent a car in Kōfu or Tokyo and follow these steps:
- Take the Chūō Expressway (E20) heading west.
- Exit at the Enzan Interchange and follow the signs for “上日川ダム” (approximately 15 km from the interchange).
- Parking: A small free lot is available near the dam’s visitor area.
Practical Tips
- Language: Signage around the dam is primarily Japanese, but the route is well‑marked with the kanji “上日川ダム”.
- Timing: Trains and buses run less frequently in the early morning and late evening, so plan to arrive between 9 am and 4 pm for the most flexibility.
4. Best Time to Visit
| Season | Highlights | Why Visit |
|---|---|---|
| Spring (Mar–May) | Cherry blossoms framing the reservoir, gentle temperatures (12‑18 °C). | Ideal for photography and leisurely walks. |
| Summer (Jun–Aug) | Lush green foliage, occasional mist over the water. | Perfect for picnics; cooler micro‑climate near the dam. |
| Autumn (Sep–Nov) | Vibrant maples and ginkgo turning gold and crimson. | Spectacular color contrast with the blue reservoir. |
| Winter (Dec–Feb) | Snow‑capped hills in the background, crisp air. | Quiet, serene atmosphere; fewer visitors. |
Peak visitor months are typically late April (sakura) and late October (koyo). If you prefer solitude, aim for early May or early December.
5. What to Expect
Scenic Views
Approaching the dam, you’ll notice the gentle curve of the reservoir reflecting the surrounding forest canopy. A short, well‑maintained walking path leads to a wooden viewing platform where the water’s surface appears almost glass‑like on calm days.
Activities
- Photography: The dam’s stone spillway and the surrounding foliage provide natural frames for landscape shots.
- Birdwatching: Early mornings attract migratory birds such as the Japanese bush warbler and kingfishers.
- Picnicking: Benches and a modest picnic area are available near the parking lot—bring a bento and enjoy a lakeside meal.
Facilities
- Restrooms: Clean, gender‑separated toilets near the visitor center.
- Information Board: A bilingual (Japanese/English) plaque explains the dam’s purpose and local ecology.
- No Admission Fee: Access to the dam and surrounding paths is free of charge.
6. Nearby Attractions
A short drive or hike from 上日川ダム opens up several natural and cultural sites worth adding to your itinerary.
| Attraction | Distance | What to See | Link |
|---|---|---|---|
| 白糸の滝 (Shiraito no Taki) | 7.4 km | A delicate cascade often called “Silk‑Thread Waterfall”. The water fans out over a wide rock face, creating a misty veil. | 白糸の滝 – Wikipedia |
| [Unnamed Fountain #1] | 9.2 km | Small historic fountain set in a quiet garden. | (local map reference) |
| [Unnamed Fountain #2] | 9.5 km | A stone‑carved water feature near a traditional tea house. | (local map reference) |
| [Unnamed Fountain #3] | 9.5 km | A modern sculpture fountain surrounded by cherry trees. | (local map reference) |
| [Unnamed Dam] | 0.1 km | Another small dam in the vicinity, offering a contrasting engineering style. | (local map reference) |
Tip: Combine a visit to 上日川ダム with a drive to 白糸の滝 for a full day of water‑themed scenery. The route is scenic, passing through rice paddies and fruit orchards—perfect for impromptu photo stops.
7. Travel Tips
| Tip | Details |
|---|---|
| Bring Cash | Small rural shops and the taxi driver may not accept credit cards. |
| Dress in Layers | Weather can shift quickly, especially near the water; a light jacket is advisable. |
| Footwear | Comfortable walking shoes with good grip are recommended for the gravel paths. |
| Respect the Environment | The dam area is a protected water source; avoid littering and stay on marked trails. |
| Timing for Photography | Early morning (sunrise) and late afternoon (golden hour) give the best light on the water surface. |
| Local Snacks | Stop at a nearby convenience store in Enzan for onigiri or seasonal fruit (Yamanashi is famous for grapes and peaches). |
| Connectivity | Mobile signal can be spotty near the dam; download offline maps beforehand. |
| Seasonal Events | Check Enzan’s municipal website for any local festivals (e.g., rice‑planting ceremonies) that may coincide with your visit. |
Wrap‑Up
上日川ダム may not have the fame of Japan’s massive hydroelectric projects, but its understated charm makes it a perfect destination for travelers seeking tranquility, authentic local scenery, and a glimpse into Yamanashi’s water‑management heritage. Pair it with the nearby 白糸の滝 and a leisurely drive through Enzan’s countryside, and you’ll experience a slice of Japan that many tourists miss.
Pack your camera, hop on a train to Enzan, and let the gentle ripple of the reservoir guide you into a quieter side of Yamanashi. Happy travels!
