Bouldering in Japan: A Guide to Mitake, Ogawayama, Mizugaki and More

Bouldering in Japan means granite in the mountains and river-polished boulders near Tokyo. The classic areas are Mitake (riverside boulders about 90 minutes by train from central Tokyo), Ogawayama and Mizugaki (high granite forests about 1,450–1,600 m up, a few hours west of Tokyo) and Kasama (granite in Ibaraki). There are also climbing areas with a long access history, such as Horai in Aichi and Jogasaki on the Izu coast. Go to the mountains from spring to autumn and to Mitake from late autumn to spring, learn the 級/段 grades, and expect strict local rules: day fees, designated parking, cash-only payment and closed boulders.

I'm a strength and conditioning coach based in Prague, not a Japanese guide or a local. This guide is built from official tourism and campsite pages, local climbers' associations and the climbing databases cited at the bottom. Rules and fees in Japan change, and they're often posted only in Japanese at the parking lot, so always check them on the day. For the general basics of climbing on real rock, start with our outdoor bouldering for beginners guide, and browse more destinations in our climbing trips section.

Japan's main bouldering areas at a glance

Two English sources are worth bookmarking before you go: MadBoulder's Japan page has video beta for classic problems at Mitake, Ogawayama and Mizugaki, and theCrag lists sectors and access notes for many areas. Japanese-language topos and the local boards at each area are still the most up to date.

Japanese bouldering grades: 級 and 段

Japan grades boulders with a system borrowed from martial arts. You start at 10級 (jukyu) and count down to 1級 (ikkyu). The next step is 初段 (shodan), the "first dan", and from there you count up: 二段 (nidan), 三段 (sandan), 四段 (yondan) and so on. As UKClimbing's early Ogawayama destination article notes, the system grew up at Ogawayama. Shodan is a big milestone: the Yamanashi tourism board's Mizugaki feature calls a shodan problem the gateway to being an "advanced" climber.

Gyms in Japan use the same 級 scale, so you may already know your grade in it. Here is a rough conversion built from theCrag and MadBoulder listings and UKClimbing's article. Treat it as a guide only, because conversions differ by a grade or so between sources.

Expect outdoor grades to feel stiffer than your gym's, especially on Mitake's polished rock and on granite slabs. Our grade converter handles V and Font grades, and climbing grades explained covers the systems in more depth.

When to go: bouldering in Japan by season

The key is altitude. Mitake sits low in a river valley at roughly 220–250 m. Ogawayama's Mawarime-daira campsite is at 1,570–1,600 m, and Mizugaki-yama Nature Park is at 1,455 m.

• December to February: Mitake season. MadBoulder describes winter there as crisp and dry, good for hard sends. Mizugaki's slopes face south, and the Yamanashi tourism board notes you can climb in warmth even in the cold of winter. However, the nature park's facilities close from early December to late April, and mountain roads can be icy.
• March to May: Mitake is still good. The Ogawayama campsite opens in late April (25 April in 2026). Golden Week (late April to early May) brings climbers from all over Japan to Mizugaki and the other mountain areas, so expect full car parks.
• June: the rainy season (tsuyu). Plan around it.
• July and August: head for the mountains. The Mawarime-daira campsite says temperatures there rarely go above 25°C (77°F), even in midsummer. Mitake is hot, humid and busy.
• September to November: often the best friction, and UKClimbing found autumn at Ogawayama much drier than spring. Typhoons can bring days of rain in late summer and early autumn. Autumn leaves at Mizugaki peak from mid-October to early November, which is also peak crowd time. At Ogawayama, nights turn freezing as autumn ends and the campsite closes for winter, so check its closing date.

Whatever the season, don't climb on wet rock. Granite friction and fragile flakes both suffer, and moss and dirt get ground into holds. Weekdays are far quieter than weekends at every area.

Mitake: river boulders a train ride from Tokyo

The Mitake boulders lie along the Tama River in Ome City, scattered across the riverbed below forested slopes. All About Japan counts more than 250 problems, and theCrag lists sectors along the river including Somanokobashi, Mitakekobashi, Unosebashi, Nakasu (sandbar) and the Ninja Gaeshi boulder area. The rock has been polished by the river, so it rewards precise footwork and body tension more than brute strength.

Classics. 忍者返し (Ninja Gaeshi, 1級) and Deadend are the famous historical lines. MadBoulder also lists video beta for Mitake problems such as メチオニン (2級) and the AB Traverse (初段). For warming up or a first outdoor day, theCrag lists the Derashine boulder, about seven minutes' walk from Mitake Station, with several problems from 8級 to 4級 (around VB to V2).

Getting there and parking. Take the JR Ome Line to Mitake Station (御嶽駅). The boulders start a short walk away. If you drive, use designated car parks only. Climb Park Base Camp's 2025 course notes list the free Kanzanji (寒山寺) car park, about 22 minutes' walk from the station, and several paid car parks closer in, including the Mitake-enchi (御岳苑地) lot. Never park on the narrow riverside roads.

Good to know. The riverbank is a public leisure area, so you'll share it with walkers, families and other visitors. Keep pads and bags tidy, and don't block paths. The same course notes list Ome General Hospital (青梅総合病院), about 25 minutes by car, as the nearest emergency department.

Ogawayama: the campsite under the granite

Ogawayama is often called the "Yosemite of Japan". Its granite boulders and cliffs surround the Mawarime-daira campsite (廻り目平キャンプ場) in Kawakami Village, Nagano. The current bilingual Ogawayama bouldering guide covers 835 problems on 187 boulders in 15 areas. MadBoulder lists over 700, with sectors from the campsite crags to Mara Iwa and Imouto Iwa.

The climbing. Expect granite slabs, edges, pockets and some steep lines. The pocketed Kujira-iwa (Whale Rock) above the car park is the most popular boulder and has a flat landing. UKClimbing's visitor found the best concentration of quality problems from 1級 to 二段 (roughly V5–V9), with plenty of easier problems too. Well-known lines include エイハブ船長 (Captain Ahab, 1級) and the very hard 伴奏者 (Bansōsha, 五段), established by Tokio Muroi.

Fees and rules (official, checked November 2026). The campsite is run by Kawakami Village's public corporation. Day visitors pay an entry fee of ¥700 per person per day (valid 4:00–19:00). Camping costs ¥1,300 per person per night. Arriving before 4:00 or leaving after 19:00 counts as camping. Parking is in the main lot past Kinpu Sanso (about 120 cars), and if it's full you should go to the Kinpu Sanso front desk. There's a live camera of the car park on the campsite website. Payment is cash or PayPay only. Credit cards are not accepted. Kinpu Sanso rents bouldering mats (120 × 90 × 12.7 cm) for ¥2,000 a day, but numbers are limited, so phone ahead if you're relying on one. The campsite also publishes an illustrated map with its site rules, which is worth reading before you go.

Getting there. By car, the campsite gives about 75 minutes from Sudama IC or 55 minutes from Nagasaka IC (both on the Chuo Expressway). By train, the nearest station is Shinano-Kawakami on the JR Koumi Line, and the campsite lists a pick-up that must be booked in advance. There are no convenience stores near the campsite, so buy food after you leave the expressway.

Where to stay. Pitch on the free site (no booking needed), book one of the two bungalows early, or stay at Kinpu Sanso, which also offers baths. Kinpu Sanso's bath is open to day visitors (14:00–19:30). The lodge has also announced renovation work on the rest area in front of the building from 13 October 2026, expected to last until the start of next season.

Mizugaki: pocketed granite in the forest

Mizugaki-yama (瑞牆山) in Hokuto, Yamanashi, is one of Japan's 100 Famous Mountains and is formed entirely of biotite granite. In the forest below it, boulders 3–5 m high are scattered among the trees. The Yamanashi tourism board calls it a "sacred place" of bouldering. In 2019 it counted more than 1,200 problems, over 90% of them first climbed by Tokio Muroi.

The climbing. The granite is full of pockets, which gives good holds on otherwise steep faces, and the hillside faces south. Examples from the tourism board's walk-through with Muroi:

• Kōtei-iwa (皇帝岩), a few minutes from the car park: 鏡 (6級), 剣 (4級) and 玉 (2級).
• Dōji-iwa (童子岩): problems from 9級 to 3級, recommended for first-time outdoor climbers.
• 阿修羅 (Ashura, 初段): known as the gateway to shodan, often with a crowd.
• 百鬼夜行 (Hyakki Yakō, 三段) on a big overhang, and アサギマダラ (Asagimadara, 5段+) on the 10 m Kumite boulder, one of Japan's hardest problems.

Base and fees. Mizugaki-yama Nature Park (みずがき山自然公園) has a free car park for about 100 cars, a campsite with about 100 tent pitches and a shop and restaurant. Hokuto's tourism association lists camping at ¥1,500 for one person or ¥3,000 for two to four, and a day-use fee of ¥300 per adult. The park is about 60 minutes from Sudama IC. Its facilities close for winter from early December to late April. Masutomi Onsen nearby makes a good rest-day soak.

Ethics. Local climbers brush moss and dirt from the holds, which is why popular boulders are clean. Many lines are high, so bring enough pads and spotters.

Kasama: what happens when access goes wrong

Kasama in Ibaraki is a granite bouldering area northeast of Tokyo, and it's a clear lesson in how fragile access is in Japan. According to theCrag's access notes, the local municipality has banned climbing on the roadside Daikoku Boulder (大黒石) since December 2017. The reasons were the danger to passing traffic and climbers leaving the boulder covered in chalk. The same notes warn that more chalk overuse could close the whole area. Climbers are asked to:

• use as little chalk as possible and brush all chalk off at the end of the day;
• put pads down to protect the ground from erosion;
• stay off the Daikoku Boulder entirely.

The notes also mention closures of the Sen-nin Tamari (千人溜) car park after storm damage. Car park arrangements change, so check current local information before you go.

Horai and Jogasaki: know the history before you go

Horai (鳳来) in Shinshiro, Aichi, is mainly known for pocketed sport crags, with some bouldering. UKClimbing describes it as the place where strong climbers go to pull on shallow monos. Its access history is worth knowing. The local climbers' association records that in 2000 there were complaints about human waste at the crags and long-term parking. A sign reading "no entry except with permission" then went up on city-owned forest in the Tochinokisawa (栃ノ木沢) area. Climbers responded by forming the 鳳来の岩場を愛するクライマーの会, holding clean-ups, and negotiating parking and access with the district and town. Before you visit, look for current notices from local climbers and stay out of any area marked closed.

Jogasaki (城ヶ崎) is a rugged coastline in Ito on the Izu Peninsula, part of Fuji-Hakone-Izu National Park. It formed when lava from the Omuroyama eruption about 4,000 years ago filled in the shoreline. It is best known for sea-cliff climbing, and parking etiquette has been a sore point. In 2007 the Horai climbers' association passed on a resident's request at Isaribi Rock: park only on the fence side of the road, keep the lane clear (a fire engine had been blocked), and don't crush roadside plants. The sea is the bigger danger. An Asahi Shimbun analysis cited on Wikipedia counted 17 water-accident deaths on the Jogasaki coast from 2013 to 2022. Never climb above breaking waves, check the swell, and don't go alone.

How to start outdoor bouldering in Japan (外岩デビュー)

Many Japanese climbers learn in gyms and then want to try 外岩 (soto-iwa, outdoor rock). Here's a responsible way to make the jump. It applies just as much to visitors.

1. Build a base in the gym first. The Yamanashi tourism board and Mizugaki pioneer Tokio Muroi recommend practising at a bouldering gym before trying real rock. Learn to fall and roll safely first (see how to fall bouldering).
2. Go with experienced people or take a course. Some gyms run one-day outdoor courses. For example, Climb Park Base Camp has run 「アウトドア・ボルダリング in 御岳」, which aims to teach you to visit crags on your own. Its kit list requires climbing shoes, a chalk bag and your health insurance card (or a copy), with crash pads available to rent.
3. Buy the local topo. Topos fund local work and show which boulders are open. Ogawayama and Mizugaki both have bilingual guides.
4. Start well below your gym grade. At Mizugaki, Dōji-iwa and Kōtei-iwa offer 9級–2級 problems. At Mitake, try the Derashine warm-ups. Expect 4級 outside to feel like 3級 or harder inside.
5. Pay fees and park where you're told. Bring cash in yen. If the car park is full, change plans rather than parking on the road.
6. Leave no trace. Use toilets before you walk in (human waste nearly closed Horai), pack out all rubbish, brush off chalk and tick marks, and never climb on boulders marked closed.
7. Be a good neighbour. Keep noise down, keep your gear in a tidy pile, and give way to hikers, anglers and families.

Our general guide to bouldering etiquette covers the gym-to-crag basics in more detail.

Gym culture: train in the city, climb on rock at weekends

Japan has a dense, strong indoor scene. Tokyo has dozens of bouldering gyms, and MadBoulder notes that many Japanese climbers train hard indoors. For visitors, two practical points stand out. First, most gyms charge a one-time registration fee on your first visit on top of the day pass, so a first session costs noticeably more (both JRPass's climbing guide and a Kailas athlete's trip report mention this). Second, local climbers mostly head outside at weekends, so weekdays at the crag are much quieter. A gym is also a good place for rainy days: a typhoon week can wipe out a whole trip's outdoor plans.

Gear to bring

• Crash pads. At least one per person. Mizugaki's highballs reward two or three in a group (see how many crash pads you need). Flying with a pad is possible but awkward, so a rental at Ogawayama or a pad bought locally may be easier. If you're buying, our best crash pads guide compares the options.
• A soft brush to clean holds and remove chalk (best climbing brushes).
• Shoes: a precise pair for granite edges and Mitake's polished footholds.
• A mat or towel for your feet and a small ground sheet for bags. Japanese course kit lists include both.
• Rain jacket, warm layer and headlamp. Mountain nights are cold even in summer.
• Skin kit: granite is abrasive (see climbing skin care).
• Cash in yen for fees, rentals and showers.

Our bouldering trip packing list has the full checklist.

Guidebooks and apps

• Ogawayama bouldering area guide (Japanese/English): 835 problems, 15 areas, transport information and a history section by Tokio Muroi. It is sold by THOUFUN.
• Mizugaki bouldering area guide (Japanese/English, A5, 262 pages, all colour, published by Daihold): supervised by Tokio Muroi, Hotaka Nakane and Toru Nakajima. Lines are marked on photos and it can be searched by grade.
• Ogawayama in English: an older free English site about the area.
• theCrag and MadBoulder: sector lists, access notes and video beta. Use them to plan, but trust the current printed topo and the local notice boards over any app.

We couldn't confirm a current printed guide to Mitake that is easy for visitors to buy, so ask at Tokyo climbing gyms or shops.

Rest days, costs and safety

Rest days. Hot springs (onsen) are the classic Japanese rest day. Masutomi Onsen is near Mizugaki, and Kinpu Sanso has a bath at Ogawayama that day visitors can use. From Mitake, a rest day in Tokyo is an easy option.

Costs. Bouldering in Japan is cheap to moderate once you're there: campsite and day fees are low, while car hire, expressway tolls and fuel are the big costs for the mountain areas. Gyms in Tokyo are relatively expensive per session.

Safety. In Japan, call 119 for an ambulance or fire and 110 for the police, according to the Japan National Tourism Organization's emergency guide. JNTO also urges visitors to get travel insurance. Climbers should check that their policy covers bouldering and search and rescue (see climbing travel insurance). Mountain areas have patchy phone signal, cold nights and few shops. Riverside and coastal areas carry water risk after heavy rain or in rough seas.

A sample 7-day bouldering trip from Tokyo

This is a suggested outline for spring or autumn, not a fixed itinerary. Shift it around the weather.

1. Day 1: arrive in Tokyo and visit a bouldering gym to shake off the flight and get a feel for Japanese grading.
2. Day 2: train to Mitake. Warm up on easy problems, then try a classic such as Ninja Gaeshi if it suits your level.
3. Day 3: pick up a rental car and drive to Ogawayama. Pay the entry fee, set up camp and climb around the campsite boulders.
4. Day 4: Ogawayama, the areas a little further from camp.
5. Day 5: rest day: hot spring and skin care.
6. Day 6: drive to Mizugaki (check the park is open). Start with Dōji-iwa and Kōtei-iwa, then move on to harder lines.
7. Day 7: a morning session at Mizugaki, then drive back to Tokyo.

More planning help: how to plan a climbing trip and winter climbing destinations (where Mitake fits in).

Common mistakes on a Japanese bouldering trip

• Arriving without cash. Ogawayama's campsite takes only cash or PayPay.
• Parking on the road because the car park is full. This has caused trouble at Jogasaki and Horai and can close an area.
• Climbing on closed boulders such as Kasama's Daikoku Boulder, or in closed forest at Horai.
• Leaving chalk and tick marks. Chalk was one of the reasons Daikoku was banned.
• Going to the mountains in winter and finding the facilities closed, or going to Mitake in midsummer.
• Expecting gym grades outside. Start a few grades lower.
• Climbing on damp granite after rain or typhoons.
• Coming at Golden Week or on autumn-leaf weekends without a backup plan for crowds and full car parks.

If you also climb in Europe, the contrast with Fontainebleau is interesting: both have a strong local ethic of protecting the rock, but in Japan the rules are often set by landowners and municipalities, and visitors are expected to know them before they arrive.

FAQ

What is the best season for bouldering in Japan?

It depends on altitude. Mountain granite areas such as Ogawayama and Mizugaki (around 1,450–1,600 m) are best from spring to autumn and stay cool in summer, while the low riverside boulders at Mitake near Tokyo are best from late autumn to spring. June is the rainy season almost everywhere, and typhoons can wash out late summer and early autumn.

How do Japanese bouldering grades compare to V grades?

Japan uses a martial-arts style system: 級 (kyu) grades count down from 10級 (easiest) to 1級, then 段 (dan) grades count up from 初段 (shodan). Roughly, 4級 is about V2, 1級 about V5–V6, 初段 about V7 (Font 7a+), 二段 about V8–V9 and 三段 about V10. Conversions vary by a grade or so between sources and areas.

Do you have to pay to boulder at Ogawayama?

Yes. Ogawayama's boulders sit around the Mawarime-daira campsite, which charges a per-person day entry fee and a separate camping fee, and parking is in the campsite's main lot. Payment is cash or PayPay only, with no credit cards, so bring yen.

Can I go bouldering in Japan without a car?

Mitake is easy by train: the boulders are on the Tama River a short walk from JR Mitake Station on the Ome Line. Ogawayama and Mizugaki are in the mountains and are far easier with a rental car; for Ogawayama the nearest station is Shinano-Kawakami on the JR Koumi Line, and the campsite lists a pick-up that must be booked in advance.

Sources

1. Yamanashi Tourism Organization, ボルダリングの聖地! 山梨・瑞牆山 (Mizugaki bouldering feature, 2019)
2. 金峰山荘・廻り目平キャンプ場 (Kawakami Village Promotion Corp.), 廻り目平キャンプ場 fees and facilities (2026)
3. 北杜市観光協会 (Hokuto City Tourism Association), みずがき山自然公園
4. theCrag, Daikoku Boulder (Kasama) – Climbing Prohibited
5. Climb Park Base Camp, アウトドア・ボルダリング in 御岳 course information (2025)
6. 鳳来の岩場を愛するクライマーの会, 2000年までの歩み (Horai access history)