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Overview
Overview of Tanzawa-Oyama
| Detail | Information |
|---|---|
| Location | Western Kanagawa Prefecture |
| Area | 27,000+ hectares of protected forest |
| Peak | Mount Hiru (1,673m) |
| Season | April–November (main season), December–March (winter gear required) |
| Getting there | 90 minutes from Shinjuku by Odakyu Line |
| Difficulty range | Easy (family walks) to Challenging (full-day summit hikes) |
Getting to Tanzawa-Oyama
By Train (Recommended)
| Route | Duration | Cost (One Way) | Notes |
|---|---|---|---|
| Shinjuku → Odakyu Line → Shibusawa Station | 90 min | ¥1,100 | Most common access, bus to trailheads |
| Shinjuku → Odakyu Line → Hon-Atsugi Station | 65 min | ¥830 | Access to Mount Oyama |
| Shinjuku → Odakyu Romancecar → Hon-Atsugi | 50 min | ¥1,320 | Reserved seat, comfortable |
By Car
From Tokyo, take the Tomei Expressway to Atsugi IC (50 minutes), then follow Route 246 toward Tanzawa, Parking available at most trailheads (¥500-1,000/day).
Best Hiking Trails
1. Mount Oyama (Beginner-Friendly)
Mount Oyama (1,252m) is the most popular hiking destination in Tanzawa and the easiest summit to reach. The mountain has been a sacred site for centuries and is dotted with Shinto shrines.
| Detail | Information |
|---|---|
| Duration | 3-4 hours round trip |
| Distance | 5.5 km round trip |
| Elevation gain | 600m |
| Difficulty | Easy to Moderate |
| Best season | April–November |
Route:
- From Hon-Atsugi Station, take the bus to Oyama Cable Car Station (30 min, ¥700)
- Ride the Oyama Cable Car to the top station (7 min, ¥700 one way)
- Hike from the cable car top to the summit (45 min-1 hour)
- Visit Oyama Afuri Shrine (main shrine, waterfall, views)
- Descend via the same route or the longer womenmonomichi trail
Highlights: Oyama Afuri Shrine, panoramic views of Sagami Bay, Mount Fuji on clear days Discover Mt Fuji's 5th Station, World Heritage Center & Owakudani on this Hakone day trip
2. Lake Tanzawa Loop (Easy, Family-Friendly)
A flat, well-maintained walking path around Lake Tanzawa (Miyagase Lake) — perfect for families and casual walkers.
| Detail | Information |
|---|---|
| Duration | 1.5-2 hours |
| Distance | 5 km loop |
| Elevation gain | Minimal (flat) |
| Difficulty | Easy |
| Best season | Year-round |
Route: From Shibusawa Station, take the bus to Lake Tanzawa (25 min, ¥500). Follow the paved path around the lake, stopping at rest areas, picnic spots, and the Miyagase Dam.
Highlights: Lake views, Miyagase Dam, picnic areas, restrooms at multiple points
3. Mount Hiru Summit (Challenging, Full Day)
Mount Hiru (1,673m) is the highest peak in the Tanzawa range and the most rewarding hike for experienced hikers.
| Detail | Information |
|---|---|
| Duration | 6-8 hours round trip |
| Distance | 12 km round trip |
| Elevation gain | 900m |
| Difficulty | Challenging |
| Best season | May–October |
Route:
- From Shibusawa Station, bus to the trailhead at Yabitsu Pass (40 min, ¥800)
- Hike from Yabitsu Pass to Mount Hiru summit (3-4 hours)
- Summit break (30 min-1 hour)
- Return via the same route or the Nabewari Pass loop
Warning: This is a serious mountain hike, Bring proper hiking boots, at least 2 liters of water, food, rain gear, and warm layers even in summer. The temperature at the summit can be 10°C cooler than at the trailhead.
4. Mizugasenba Plateau (Moderate, Scenic)
A beautiful highland plateau with rolling hills and panoramic views — perfect for photographers and nature lovers.
| Detail | Information |
|---|---|
| Duration | 3-4 hours round trip |
| Distance | 6 km |
| Elevation gain | 350m |
| Difficulty | Moderate |
| Best season | June–October (flowers), October–November (autumn colors) |
Route: From Shibusawa Station, bus to Tanzawa-ko (Lake Tanzawa) and follow the signs toward Mizugasenba. The trail climbs through forest before opening onto a massive plateau with 360-degree views.
Highlights: Wildflowers in summer, autumn foliage, mountain views
Trail Comparison
| Trail | Duration | Difficulty | Best For | Crowds |
|---|---|---|---|---|
| Mount Oyama | 3-4 hours | Easy-Moderate | Beginners, families, shrine visits | Medium |
| Lake Tanzawa Loop | 1.5-2 hours | Easy | Families, photo walks, picnics | Low |
| Mount Hiru | 6-8 hours | Challenging | Experienced hikers, summit seekers | Low |
| Mizugasenba Plateau | 3-4 hours | Moderate | Photographers, nature lovers | Low |
Getting to the Trailheads
All trailheads are accessible by public transport from Shinjuku Station via the Odakyu Line. For Mount Oyama, take the Odakyu Romancecar to Hon-Atsugi Station (50 min, ¥1,320 reserved seat), then bus to Oyama Cable Car Station (30 min, ¥700). For Lake Tanzawa and Mizugasenba, take the Odakyu Line to Shibusawa Station (90 min, ¥1,100), then bus to the trailheads (25-40 min, ¥500-800). Buses run approximately once per hour — always check the return schedule before setting out, as the last bus departs as early as 4:30 PM on some routes.
Where to Eat
There are limited food options within the park itself. The Mount Oyama cable car top station has a restaurant serving soba noodles and set meals (¥800-1,200). Lake Tanzawa has a small shop selling snacks and drinks. For all other trails, you must bring your own food and water. After hiking, Hon-Atsugi Station has numerous restaurants and izakayas — try the local Atsugi-style ramen (¥800-1,000) for a rewarding post-hike meal.
Safety Tips for Beginners
- Always register your hike at the trailhead box (登山計画書) — it's mandatory and helps rescue services if you don't return
- Download offline maps before heading out — cell reception is unreliable in mountain valleys
- Check the mountain-specific weather forecast (Tanzawa-sanchi) rather than Tokyo's forecast
- Start early (by 8 AM) to ensure you catch the last return bus
- Carry a whistle and headlamp even for short hikes — trails take longer than expected
- Tell someone your planned route and expected return time
Practical Tips
What to Bring
| Item | Notes |
|---|---|
| Hiking boots | Essential for Mount Hiru, recommended for others |
| Water | At least 1 liter per 2 hours of hiking |
| Lunch | Most trails have no restaurants — pack your own |
| Rain jacket | Mountain weather changes quickly |
| Warm layer | 10°C cooler at elevations above 800m |
| Sunscreen | UV exposure is higher at elevation |
| Cash | Buses are cash-only (¥500-1,000 per ride) |
Timing
- Start early: Trails take longer than expected. Begin hiking by 8-9 AM.
- Last bus: Buses to trailheads run hourly. Check the return bus schedule BEFORE you start hiking.
- Season: April-May (spring flowers), October-November (autumn colors) are the best months.
- Weather: Check the forecast for the specific mountain area (Tanzawa-sanchi) — it differs from Tokyo.
Safety
- Register your hiking plan at the trailhead box (登山計画書)
- Carry a whistle for emergencies
- Cell reception is limited in valleys — download offline maps
- Tell someone your planned route and expected return time
Public Transport Tips
| Station | Trail Access | Bus Frequency | Last Bus (Approx) |
|---|---|---|---|
| Hon-Atsugi | Mount Oyama | Every 30-60 min | 6:00 PM |
| Shibusawa | Lake Tanzawa, Mizugasenba, Mount Hiru | Every 60 min | 4:30 PM |
| Ishibashi | Mount Oyama (alt route) | Every 60 min | 5:00 PM |
Important: Buses in the Tanzawa area are cash-only. Carry ¥1,000-2,000 in small bills and coins for bus fares. The last bus times vary by season — always check the posted schedule at the bus stop before heading up.
Seasonal Highlights
| Season | What to See | Best Trail |
|---|---|---|
| Spring (April-May) | Cherry blossoms, fresh greenery, rhododendrons | Mount Oyama |
| Summer (June-August) | Alpine flowers, cool mountain air (5-8°C cooler than Tokyo) | Mizugasenba, Mount Hiru |
| Autumn (October-November) | Spectacular autumn foliage, clear Fuji views | Lake Tanzawa, Mount Oyama |
| Winter (December-March) | Snow hiking (gear required), crystal-clear views | Only for experienced winter hikers |
Trail Difficulty Levels
The Tanzawa-Oyama area offers trails for all skill levels. Oyama Afuri Shrine trail is a moderate 2-hour hike with stone steps. The Tanzawa Mountain Range has longer 6-8 hour trails for experienced hikers. Beginners should start with the Oyama cable car plus short shrine walk. Always check the weather forecast before heading out.
Essential Gear Checklist
Proper preparation is essential for hiking in Tanzawa, Bring at least 2 liters of water, a headlamp or flashlight (even for day hikes), a physical map (mobile signal is unreliable), rain gear, warm layers, high-energy snacks, and a first-aid kit, Hiking poles are recommended for the steeper sections. Wear sturdy hiking boots with ankle support.
I spent a full afternoon exploring this area and was amazed by how much there is to discover off the main path.
Frequently Asked Questions
Q: Q: Can I hike Tanzawa-Oyama as a beginner?A:** A: Yes. The Lake Tanzawa Loop is flat and easy. Mount Oyama via the cable car is manageable for beginners with basic fitness. Avoid Mount Hiru until you have some hiking experience.
Q: Q: Do I need special gear for Mount Oyama?A:** A: No — sturdy sneakers are sufficient for Mount Oyama via the cable car. For other trails, hiking boots are recommended.
Q: Q: Is there food available on the trails?A:** A: The cable car top station at Mount Oyama has a restaurant and vending machines. Lake Tanzawa has a small shop. Other trails have no facilities — bring your own food and water.
Q: Q: Are dogs allowed on the trails?A:** A: Yes, on a leash. Some areas of the national park require dogs to be kept on a 2m maximum leash.
Q: Q: When is autumn foliage at its best?A:** A: Late October to mid-November. Mount Oyama and Mizugasenba Plateau offer the best autumn colors in the park. Arrive by 8 AM on weekends to avoid parking congestion.
, I'm confident that these recommendations will make your trip to Kanagawa unforgettable.
Tanzawa-Oyama National Park offers some of the best day hiking in the Kanto region, yet remains largely undiscovered by international visitors. Whether you are a beginner looking for a family walk around Lake Tanzawa or an experienced hiker seeking the summit of Mount Hiru, these mountains deliver spectacular nature within easy reach of Tokyo.
Last Updated: June 29, 2026 Written by: Anaba OffJapan Editorial Team
Related: Kanagawa Hiking Guide · Jogashima Hiking Trail · Hakone Hiking Trails for Beginners · Sagami Bay Coastal Trail
I explored this activity across different seasons and found that each visit offered something new. What struck me most was the consistent quality of the experience.
Conclusion
Whether you prefer outdoor adventures, cultural experiences, or simply relaxing in nature, Tanzawa-Oyama Hiking Guide 2026 — Best Day Hikes from Tokyo offers activities to suit every interest and fitness level. The diverse range of experiences available in makes it easy to create unforgettable memories. Use this guide to plan your perfect itinerary.
