Mt. Ishiwari Hike: Mt. Hirao and Mt. Ohira with Views of Lake Yamanaka and Mt. Fuji (7 km Loop)

Route map of the Mt. Ishiwari loop: trailhead, Ishiwari Shrine, Mt. Ishiwari, Mt. Hirao and Mt. Ohira, about 7.0 km

On Sunday, April 27, 2025, I hiked Mt. Ishiwari (1,413 m) in Yamanakako, Yamanashi. I started from the Ishiwari Shrine parking lot and walked a loop of about 7.0 km through Ishiwari Shrine, the summit, Mt. Hirao and Mt. Ohira. The cherry trees at the trailhead were in full bloom, and from the summit there was an unobstructed view of Mt. Fuji!

Route Data

Item

Record

Date

Sunday, April 27, 2025

Distance

approx. 7.0 km

Total time

approx. 4 h 45 min (incl. breaks)

Elevation gain

approx. +640 m

High point

1,413 m (Mt. Ishiwari)

Route

Trailhead (Ishiwari Shrine parking) → Ishiwari Shrine → Mt. Ishiwari → Mt. Hirao → Mt. Ohira → Mt. Hirao → Trailhead

Access & Parking

The trailhead is the Ishiwari Shrine parking lot. The cherry trees there were in full bloom when I arrived. I got there at around 7:30 a.m., and there were already cars parked, with only a few spaces left.

https://maps.app.goo.gl/BXLnrmV8k9zMPHNH7

Ishiwari Shrine parking lot with cherry trees in full bloom and parked cars

The hike starts across the red bridge beside the trailhead. As far as the shrine, the trail is a pilgrimage path.

Mt. Ishiwari trailhead, red-railed bridge and signpost showing Hirano Bus Stop at 1.8 km

Clothing & Gear

It was a blue-sky day, and I saw no snow on the trail. That only describes the day I was there. The breeze was cool, but it was warm enough that I hiked in long sleeves with no outer layer.

As for the trail, parts of the stone stairway have handrails. The crack in the rock is narrow, and some people ducked to get through. Between the shrine and the summit, the path narrows through bamboo grass, and in places you step over fallen trees. I didn't see any chain sections, and around the crack there were just handrails and rope-like fencing. The stone steps early on and the stairs toward Mt. Ohira were the hardest parts, but I think beginners can manage if they take it slowly.

Hike Log

Trailhead → Ishiwari Shrine (1.1 km, approx. 40 min)

I set off at about 8:05 a.m. A short way along stands a red torii gate with a thick straw rope and bells hanging from it. The hikers ahead of me passed through it.

Red torii gate with a straw rope on the Mt. Ishiwari trail, hikers passing through from behind

A komainu guardian statue.

Komainu guardian statue on the approach to Ishiwari Shrine

Through the gate, the stairway of about 400 stone steps begins, running straight up through the cedars. Further up it becomes a long straight flight with a handrail. The climb keeps going, so I found the steps quite tough.

Past the steps there's a spot with small shrines and stone monuments, and then a gravel path through deciduous woods. The trail goes by a junction, crosses a bridge with pipe guardrails, follows a stretch of boardwalk, and finishes with another flight of steps with a handrail up to the shrine. There were several hikers ahead of me along here.

Ishiwari Shrine (approx. 20 min stop)

I reached Ishiwari Shrine at about 8:45 a.m. The object of worship here is a huge split rock, and passing through the crack three times is said to bring good luck.

Giant rock with a straw rope and the shrine building at Ishiwari Shrine

I went through three times as part of my visit. This is the crack. The rock walls rise straight up on either side, with light coming through at the far end.

The crack in the sacred rock at Ishiwari Shrine, with light at the far end

It's narrow inside, and the person in front of me ducked to get through. You can make it through with a small backpack, but it's only just wide enough for an adult man.

Looking up, you can see the straw rope tied around the rock.

Looking up at the giant rock with its straw rope at Ishiwari Shrine

The shrine building sits right up against the rock, with stone lanterns lined up nearby. A few hikers had gathered in front of it. With my visit done, I headed for the summit.

Ishiwari Shrine building and stone lantern in front of the giant rock

Shrine → Summit (0.5 km, approx. 20 min)

It's a short section, but the path is narrow and half buried in bamboo grass, with fallen trees to step over and branches sticking out.

Narrow path through bamboo grass between Ishiwari Shrine and the summit of Mt. Ishiwari

Then the bamboo grass ends and the view suddenly opens up.

Summit of Mt. Ishiwari (1,413 m, approx. 1 hr break)

I reached the summit at about 9:26 a.m., and there it was: Mt. Fuji with nothing in the way! Mt. Fuji (3,776 m) stands straight ahead, with Lake Yamanaka below and cherry trees in bloom in the foreground. It's beautiful.

Mt. Fuji and Lake Yamanaka from the summit of Mt. Ishiwari, cherry blossoms in front

There's an information board up here, and a few people were taking in the view in front of it. Move a little and you can see Mt. Fuji through the blossoms. I stopped here for about an hour.

A marathon race happened to be on, so I chatted with the race staff while having a snack and some coffee. It wasn't very crowded.

Summit → Mt. Hirao (1.3 km, approx. 25 min)

From the summit the trail heads west along the ridge. It starts in cedar forest, with a tree leaning over the path at one point, then drops through brighter woods.

Forest trail on the ridge between Mt. Ishiwari and Mt. Hirao

Cherry trees line the trail from the summit to Mt. Hirao, so this is the section to see in blossom season! I was a little late, and many of them had already lost their flowers.

A few late-blooming trees were still in flower, so I enjoyed them on my way to Mt. Hirao.

Late-blooming cherry tree on the ridge between Mt. Ishiwari and Mt. Hirao

After the low shrubs, the path comes out on a ridge of dry pampas grass and the view opens up again. I could see hikers in the distance with Mt. Fuji beyond them.

Mt. Hirao ridge with distant hikers and Mt. Fuji

I reached Mt. Hirao at 10:51 a.m.

Mt. Fuji and Lake Yamanaka are clearly visible from around here as well, and you can see the lakeshore down below.

Mt. Fuji and Lake Yamanaka from near Mt. Hirao

Mt. Hirao → Mt. Ohira (1.4 km, approx. 25 min)

This part is a ridge walk through dry pampas grass, with clumps of cherry trees beside the path. I passed a hiker in a blue jacket coming the other way.

Dry pampas grass ridge trail and cherry trees between Mt. Hirao and Mt. Ohira

The grassy path leads to an open area with a wire fence and benches made from fallen logs. A motorcycle was parked there, and someone sat on a bench looking at the view.

Mt. Ohira marker post showing an elevation of 1295

11:25 a.m., Mt. Ohira, 1,295 m

The view from Mt. Ohira takes in both Mt. Fuji and Lake Yamanaka.

Mt. Fuji and Lake Yamanaka from Mt. Ohira

It's really beautiful, and a great place for photos!

Hikers looking at Mt. Fuji and Lake Yamanaka from Mt. Ohira

Descent: Mt. Ohira → Mt. Hirao → Trailhead (2.7 km, approx. 55 min)

I went back along the same trail to Mt. Hirao and passed it at about 12:27 p.m. From there I took a different trail, further south than the way up, so this route doesn't return past the shrine or the summit. I was back at the trailhead at 12:49 p.m.

Onsen After the Hike

A hot spring is a great way to end a hike! Near the trailhead I also noticed a sign pointing out a day-use onsen.

Ishiwari-no-Yu

Ishiwari no Yu is a day-use hot spring facility at the foot of Mt. Ishiwari, in the Hirano district of Yamanakako Village. It opened in July 1996 as the village's hot spring facility, and its interior makes generous use of cypress and chestnut wood. The baths and a large rest hall are arranged around a courtyard inside the domed building, in the quiet of a mountain settlement. The water is an alkaline simple hot spring with a strongly alkaline pH of 10.2. The source, named Hirano Onsen, comes out at 26.5 degrees Celsius at 185 liters per minute. The water is clear, tasteless and odorless, and leaves a slippery feel on the skin. The main bath is kept at around 41 degrees Celsius, and there is also a lukewarm source bath. The bathing area includes an indoor main bath, an outdoor rock bath, an outdoor cypress bath, a reclining bath, a sauna and the lukewarm source bath. A snack counter serves local udon and soba, and the large hall is a comfortable place to rest after bathing. Admission is 900 yen for adults, 700 yen for junior high and high school students and 350 yen for elementary school children, with free entry for preschoolers. Bath towels can be rented for 180 yen and face towels are sold for 220 yen. Payment is cash only, and guests with tattoos are not admitted. The facility is generally open from 11:00 to 19:00 (last entry 18:15), and until 20:00 on weekends and holidays. It is closed on Thursdays, except when Thursday is a holiday, and it stays open during Golden Week, from the third week of July to the second week of September, and over the New Year holidays. Opening time can change by month and temporary closures occur, so it is wise to call 0555-20-3355 before you go. By car it is about 15 minutes from Yamanakako IC, with 150 free parking spaces. The trailhead for Mt. Ishiwari and Ishiwari Shrine is about 1.8 km (about 4 minutes) away by car, so the bath also fits well before or after a hike.
Quality
Alkaline Simple Hot Spring
Heat
Heated
pH
pH 10.2
pH
0714
AcidicNeutralAlkaline
Use
Stay N/A/Day Trip OK
Fee
Adult 900JPY/Child 350JPY
Hours
MonTueWedThuFriSatSunHol
11:00 - 19:0011:00 - 19:0011:00 - 19:0011:00 - 19:00Closed11:00 - 19:0011:00-20:0011:00-20:0011:00-20:00
View detail page

Ishiwari-no-Yu (Yamanakako Hirano Onsen) is approx. 1.8 km or 4 minutes by car from the trailhead. I couldn't go this time because I was short on time, but it's close and convenient for a stop after the hike. Finishing at 12:49 p.m. as I did would put you within its opening hours.

  • Admission: ¥900 for adults
  • Hours: 11:00 a.m. to 7:00 p.m. on weekdays, 11:00 a.m. to 8:00 p.m. on weekends, holidays and some other days
  • Closed: Thursdays (open on national holidays, during Golden Week, from the third week of July to the second week of September, and over New Year)
  • Parking: free, 150 spaces

This comes from Yamanashi Prefecture's tourism website, as of December 24, 2024. The official website was down for maintenance on November 1, 2026, so I couldn't confirm it there. Please check with the facility before you visit.

If you're happy to drive further, Shingenkan at Nakagawa Onsen also takes day visitors. It's 33.8 km and about 48 minutes from the trailhead. It's an inn as well, so you'll find the details in the next section.

Where to Stay Nearby

These work for a night before or after hiking Mt. Ishiwari. Driving times are from the trailhead and are approximate.

Place

Drive from the trailhead

Options

Nakagawa Onsen Shingenkan

33.8 km, approx. 48 min

Day visit, overnight

Nakagawa Onsen Ao no Sanso

33.8 km, approx. 49 min

Day visit, overnight

Hakone Ginyu

42.5 km, approx. 1 h 4 min

Overnight

Nakagawa Onsen Shingenkan

Shingen-kan is a long-established inn at the source of Nakagawa Onsen, a spring long known as one of Takeda Shingen's kakure-yu (hidden healing springs), where the famous warlord is said to have sent his wounded soldiers to recover around 450 years ago. Founded in 1910, the inn carries over 115 years of history, and sits deep in the Nishi-Tanzawa valley of Kanagawa Prefecture — just 90 minutes from central Tokyo, yet steeped in mountain stillness and quiet dignity. The inn's spring, Shingen-ko Kakushi-yu, is an alkaline simple hot spring at an exceptional pH 10.1 — among the highest in Japan. The water leaves skin noticeably silky during bathing and smooth and supple after, earning it the title of "beauty spring." Remarkably, the water can also be drunk, and is said to benefit digestive ailments — making it one of the rare hot springs that nurtures both outer and inner wellbeing.
Quality
Alkaline Simple Hot Spring
Temp
40℃ to 42℃
Supply
Natural Source Flow
pH
pH 10
pH
0714
AcidicNeutralAlkaline
Use
Stay OK/Day Trip OK
Fee
Adult 1000JPY/Child ---JPY
Hours
MonTueWedThuFriSatSunHol
15:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:0015:00 - 10:00
View detail page

Nakagawa Onsen Ao no Sanso

Ao no Sanso is a secluded inn at the deepest reaches of Nakagawa Onsen in the Tanzawa mountains of Kanagawa Prefecture — a spring long known as one of Takeda Shingen's kakushi-yu (hidden healing springs), where the warlord is said to have sent his wounded soldiers to recover after battle. Despite being just 90 minutes from central Tokyo by car, the inn is enveloped in the deep quiet of a mountain valley. It is the sole member inn of the Nihon Hitoyu wo Mamoru Kai (Society for the Preservation of Japan's Hidden Hot Springs) in Kanagawa Prefecture. The inn's defining feature is its on-site self-flowing spring at an exceptional pH 10.5 — one of the highest alkalinity readings of any hot spring in Japan. The water flows undiluted and chemical-free into all six baths, leaving skin remarkably smooth and soft — a classic "beauty spring." The facility has been recognized as a model site under the Japan Spa Association's natural hot spring certification program. The grounds span roughly 33,000 m² (one mantubo), attracting over 60 species of wild birds annually. In early summer, the trees fill with the egg masses of Kajika tree frogs, and nightly guided firefly-watching tours are held along the property. Inside the inn, a gallery dedicated to Koji Fukiya — a beloved Taisho and Showa-era lyrical artist who evacuated to nearby Yamakita Town during the war — houses around 2,000 works including original paintings and publications. Nature and art coexist here in a way found nowhere else.
Quality
Alkaline Simple Hot Spring
Temp
40℃ to 42℃
Supply
Natural Source Flow
pH
pH 10.5
pH
0714
AcidicNeutralAlkaline
Use
Stay OK/Day Trip OK
Fee
Adult 1000JPY/Child ---JPY
Hours
MonTueWedThuFriSatSunHol
10:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:3010:30 - 14:30
View detail page

Hakone Ginyu

Hakone Ginyu is a ryokan built against the Haya River gorge at about 420 meters above sea level, roughly a 3-minute walk from Miyanoshita Station on the Hakone Tozan Railway. Miyanoshita has welcomed visitors since the Meiji era, and the inn keeps just 20 rooms on its slope. Every room has a terrace and its own open-air bath, so the gorge greenery and autumn color can be enjoyed without leaving the room. The water comes from the inn's own sources and is a sodium chloride spring, classified as hypotonic, weakly alkaline and high temperature. The analysis records a pH of 8.4, a source temperature of 52.6 C and a flow of about 120 liters per minute. As is typical of chloride waters, the warmth lingers after bathing and the skin feels moisturized. The private open-air bath uses 100 percent source water with no dilution, heating or recirculation, and the temperature is controlled by the flow rate. The large baths and in-room baths combine dilution, heating and circulation filtration. The large baths Tsukishiro and Tsukine are infinity baths with no visible rim, looking out over the Hakone mountain range. They swap between men and women by time slot, and one of them has a sauna. The GinyuSpa pavilion has a private open-air bath facing a water garden, along with treatment rooms where a hand treatment can be combined with the bath. Meals are seasonal kaiseki, and there is a bar lounge on the premises. Day visitors can book the private open-air bath for 30 minutes at 1,700 yen, but only together with a GinyuSpa treatment; bathing alone is not accepted. Reservations are made by phone at 0460-82-3355. Overnight stays run from 14:00 check-in to 11:00 check-out, and free parking is available for 15 cars. Buses run from Odawara and Hakone-Yumoto stations, and by car the inn is about 20 minutes from the Hakone-guchi IC on the Seisho Bypass.
Quality
Sodium - Chloride Spring
Supply
Partial Natural Flow
Heat
Heated
pH
pH 8.4
pH
0714
AcidicNeutralAlkaline
Use
Stay OK/Day Trip OK
Fee
Adult 1700JPY/Child ---JPY
Hours
MonTueWedThuFriSatSunHol
10:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:0010:00 - 20:00
View detail page

FAQ

How long does the Mt. Ishiwari hike take?

My loop out to Mt. Hirao and Mt. Ohira took about 4 h 45 min, including an hour's break at the summit. It's about 40 minutes to the shrine, then after a 20-minute stop there, about 20 more to the top.

Where do you park for Mt. Ishiwari?

At the Ishiwari Shrine parking lot, which is the trailhead. It's about a 16-minute drive from Yamanakako IC. Please confirm the capacity and any fee locally or with Yamanakako Village.

How many steps are there up to Ishiwari Shrine?

About 400, some with a handrail.

When do the cherry trees bloom on Mt. Ishiwari?

In 2025, the blossoms at the trailhead were in full bloom on April 27. Timing changes from year to year, so check the latest reports.

Is there an onsen near the Mt. Ishiwari trailhead?

Yes. Ishiwari-no-Yu is about 4 minutes away by car.

Wrap-up

Mt. Ishiwari gives you a sacred split rock, a stairway of about 400 steps and a big Mt. Fuji view all on one hike. Adding Mt. Hirao and Mt. Ohira brings the distance to about 7.0 km, and Mt. Fuji and Lake Yamanaka come into view at many points along the ridge. If you can, go in blossom season. I went on April 27, but the timing shifts each year, so check before you go. Ishiwari-no-Yu is also close by for after the hike. It's worth doing at least once!

Watch the Video

The video's chapters follow the same sections as the Hike Log above.

Thumbnail of the Mt. Ishiwari hiking video

Mt. Ishiwari Hike: Stunning Mt. Fuji & Cherry Blossom Views (YouTube)

  • 00:00 Opening
  • 00:27 About Mt. Ishiwari
  • 00:56 Route Overview
  • 01:41 Trailhead → Ishiwari Shrine
  • 02:43 Ishiwari Shrine
  • 04:19 Shrine → Summit
  • 04:40 Summit of Mt. Ishiwari 1,413 m
  • 05:34 Summit → Mt. Hirao
  • 06:57 Mt. Hirao → Mt. Ohira
  • 09:05 Descent via Mt. Hirao

Times and distances are from my own record and are approximate. Fees and hours are as of the dates given, so please check with each facility for the latest. Driving times are from Google Maps, checked on November 1, 2026. Please check current trail and shrine conditions before your hike.

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