Izu Hiking — Trails, Waterfalls & Volcanos

Lisa hiked all five trails in this guide in one week. She also got lost on Mount Amagi, developed three blisters, and declared it the best week of her year. Izu's trails aren't famous like the Kumano Kodo or the Nakasendo, and that's exactly why you should hike them. No crowds, no tour groups, no souvenir shops at the trailhead. Just good trails through excellent scenery.

The peninsula's volcanic geology makes for varied hiking. You get coastal cliff walks with ocean views on one side and forest on the other. You get mountain traverses through bamboo groves and past old lava formations. You get waterfall trails where the air is 10 degrees cooler than the coast. And at the end of every hike, there's an onsen waiting. That's the Izu hiking experience.

The trails in this guide range from easy (anyone can do them) to moderately hard (you need fitness and proper gear). We've included practical details — trailhead access, best season, what to bring, and where to soak afterward. All distances and times are one-way unless noted.

Jogasaki Coast Picnic Course — Easy, Scenic

Distance: 3 km (one way) | Difficulty: Easy | Time: 1 hour | Elevation: Minimal

This is the trail everyone can do. It's mostly flat, well-maintained, and the views are spectacular the entire way. The trail follows the clifftops along the Jogasaki Coast, starting from the suspension bridge and heading north along the coast. You're walking on volcanic rock with the Pacific Ocean crashing against cliffs 30-50 meters below. It's dramatic, it's beautiful, and it's impossible to get lost.

The trail surface is a mix of boardwalk, packed earth, and rocky sections. There are railings along the cliff edges — reassuring if heights make you nervous. The path is wide enough for two people to walk side by side comfortably. Benches are placed at regular intervals for resting and photo-taking.

The suspension bridge at the southern end is the main attraction. It's 48 meters long and sways slightly in the wind. Cross it, then continue north along the coast. After about 1.5 kilometers, you'll reach a lighthouse viewpoint with a covered rest area. This is a good turnaround point if you want a shorter walk (3km round trip). Continuing to the northern trailhead adds another 1.5km.

Wildlife along this trail includes seabirds (cormorants, gulls, occasionally hawks), lizards, and in late spring, wildflowers on the cliff edges. Whales can sometimes be seen from the cliffs during migration season (December-April). Bring binoculars if you have them.

Access: Take the train to Jogasaki-Kaigan Station on the JR Ito Line (about 2 hours from Tokyo). From the station, it's a 15-minute walk to the suspension bridge trailhead. Alternatively, park at the Jogasaki parking lot (¥300-¥500) if you're driving.

Best season: Year-round. Spring (March-May) has wildflowers. Summer can be hot with no shade — bring sun protection. Fall (October-November) has the clearest views. Winter is crisp and quiet.

Mount Omuro Loop — Short & Sweet

Distance: 1 km (loop) | Difficulty: Easy | Time: 30 minutes | Elevation: Minimal (starts near summit)

Mount Omuro is Izu's most distinctive mountain — a nearly perfect extinct volcanic cone with a crater you can walk around. The chairlift takes you most of the way up (¥600 round-trip), and from there it's an easy 1-kilometer loop around the crater rim. The views are 360 degrees and encompass the entire peninsula.

The trail around the rim is wide, flat, and well-maintained. It's more of a walk than a hike, honestly. But the views make it unmissable. Looking east, you see the Pacific coast stretching toward Shimoda. South, the interior mountains. West, Suruga Bay and (on clear days) Mount Fuji. North, the Amagi mountain range.

The crater interior is off-limits — it's a protected nature reserve and the slopes are steep. But the rim walk gives you plenty to look at. The contrast between the green crater bowl and the blue ocean beyond is striking. In winter, the higher elevation can mean frost or even light snow on the ground while the coast is clear.

This trail pairs well with the Jogasaki Coast walk — they're only 15 minutes apart by car. Do Mount Omuro in the morning for the clearest views, then Jogasaki in the afternoon. The chairlift operates 9am to 4:30pm, with the last ascent at 4pm. Check weather before you go — the lift closes in high winds and there's no point visiting if the summit is in clouds.

Access: Bus from Ito Station (35 minutes, ¥720) or drive and park at the base (¥500). The chairlift station is clearly marked.

Best season: Clear days any time of year. Winter has the best visibility. Spring has azaleas on the lower slopes. Avoid cloudy days — the views are the entire reason to visit.

Mount Amagi Traverse — The Real Hike

Distance: 10 km (one way) | Difficulty: Moderate to Hard | Time: 5-6 hours | Elevation: ~800m total gain

This is the hike that separated Lisa from her toenails. The Mount Amagi traverse is a proper mountain hike — 10 kilometers across the spine of the Amagi mountain range, crossing multiple peaks including Bunyajyama (the highest in Izu at 1,406 meters). It's beautiful, it's demanding, and it's the best hike on the peninsula.

The trail starts at Amagi Pass on the western side and ends at Amagi Yugashima on the eastern side (or vice versa). Most hikers go west to east because the elevation profile is slightly more favorable. The trail is well-marked with signposts every few hundred meters, but fog can reduce visibility dramatically — Lisa got turned around near the summit when clouds rolled in unexpectedly.

The terrain varies throughout the hike. The western approach starts in dense forest — cedar and cypress at lower elevations, giving way to deciduous forest and bamboo groves as you climb. Near the summit, the trail breaks out onto open ridgeline with panoramic views. The eastern descent passes through some of Izu's most beautiful forest, including sections of old-growth woodland with massive trees.

There are several peaks along the route. Bunyajyama (1,406m) is the highest and has a small shrine and summit marker. Takamoriyama (1,250m) offers views of the east coast. The saddle between peaks has boardwalk sections to protect the fragile alpine vegetation — stay on these.

Water sources are limited. There's a stream near the 3km mark (west side) that should be treated before drinking. Otherwise, carry all your water — at least 2 liters per person, more on hot days. There are no facilities along the trail.

The trail can be muddy after rain. Waterproof hiking boots are strongly recommended. Trekking poles help on the steep descents. In winter, the higher sections can have ice and snow — microspikes are useful January through March.

Kawazu Seven Waterfalls — Forest Walk

Distance: 2.5 km (one way, downhill) | Difficulty: Easy | Time: 1.5 hours | Elevation: -200m (downhill)

The Kawazu Seven Waterfalls trail follows a mountain stream through a lush forest gorge, passing seven named waterfalls along the way. It's a downhill walk (if you start from the top), which makes it accessible for most fitness levels. The trail is paved or wooden walkway for most of its length, with some natural surface sections.

The seven waterfalls range from small cascades to a 30-meter drop. Each has a name and a small viewing platform. The most impressive is Oh-daru — the "Great Falls" — about halfway down the trail. It's a two-tiered waterfall with a large pool at the base. The wooden viewing platform here is a good place to stop and soak in the atmosphere (and take photos).

The forest here is stunning. Cedar, cypress, and broadleaf trees create a dense canopy that keeps the trail cool even in summer. Ferns and moss cover the rocks and banks. The stream is clear and cold — you can see fish in the deeper pools. The air smells of earth, vegetation, and mineral water from the hot springs that feed into the stream in places.

Boardwalk sections cross wetter areas and pass close to the stream. These can be slippery — watch your step, especially after rain. The trail is not wheelchair accessible due to stairs and uneven sections, but it's manageable for anyone with basic mobility.

At the bottom of the trail, you emerge at the Kawazu River near the town. From here, it's a short walk to the free foot baths along the river — the perfect way to rest your feet after the hike. The foot baths are open 24 hours and free. Bring a towel.

Access: Take a bus from Kawazu Station to the trailhead at the top (about 15 minutes, ¥330). Alternatively, walk up the trail in reverse (uphill) — it's a good workout but takes longer. By car, park at the lower lot near the river and take the bus up, or park at the small upper lot (fills early).

Best season: Year-round. Summer is coolest due to the forest canopy. Fall has foliage colors (late November-early December). Winter has the most water in the falls. Spring has wildflowers along the trail.

Cape Irozaki to Irozaki Port — Coastal Walk

Distance: 4 km (one way) | Difficulty: Easy | Time: 1.5 hours | Elevation: Minimal

This trail connects Cape Irozaki (the southern tip of Izu) with Irozaki Port, following the coastline through subtropical vegetation. It's mostly flat, with a few gentle ups and downs. The scenery is completely different from the mountain trails — you're walking along cliff edges with the open Pacific on one side and dense, almost jungle-like vegetation on the other.

The trail starts at the Cape Irozaki lighthouse parking area. Walk past the lighthouse and follow the coastal path north. The vegetation here is subtropical — palm trees, wild orchids, plants you wouldn't expect to find on mainland Japan. The Kuroshio Current keeps this area warm year-round, creating a microclimate that supports species normally found much further south.

The trail passes several small coves and rocky beaches. You can't access most of them — the cliffs are too steep — but you can look down into clear water and see fish swimming. On calm days, the water is turquoise near the shore, fading to deep blue further out. It's the kind of view that makes you stop walking and just stare.

Near Irozaki Port, the trail descends to sea level and passes a small fishing harbor. There are two seafood restaurants here that serve lunch until about 2pm. The kaisendon (seafood rice bowl) is excellent — fresh fish from the morning catch, generous portions, reasonable prices (¥1,200-¥1,500).

From Irozaki Port, you can retrace your steps or arrange pickup. There's no regular bus service from the port itself — the nearest bus stop is at Cape Irozaki. Most hikers do this as an out-and-back from the cape (8km total, 3 hours).

Access: Drive to Cape Irozaki (parking ¥500) or take a bus from Shimoda Station (about 40 minutes, ¥800). The bus service is limited — about 4-5 buses per day in each direction.

Best season: Spring (March-May) has wildflowers including the Irozaki azaleas. Summer is hot but the sea breeze helps. Fall is pleasant and clear. Winter is mild due to the warm current.

What to Bring

For the easy trails (Jogasaki, Omuro, Waterfalls, Irozaki), you don't need much. Comfortable walking shoes with grip (trail runners or light hiking shoes), water (1 liter), snacks, sun protection, and a light rain jacket. That's it. These trails are well-maintained and close to civilization.

For the Mount Amagi traverse, you need proper hiking gear. Waterproof hiking boots with ankle support are essential — the trail is rocky, steep in places, and often muddy. Trekking poles significantly help on the descents. Carry 2-3 liters of water, lunch, snacks, a first aid kit, and a headlamp (in case you take longer than expected). A map and compass (or GPS device) are recommended — fog can reduce visibility to near zero on the ridgeline.

All trails: tell someone your plan before you go. Phone reception is generally good on the coastal trails but spotty in the Amagi mountains. Download offline maps before you go. The Amagi traverse in particular should not be attempted alone unless you're an experienced hiker.

Bear Safety — Rare But Real

Japanese black bears live in the mountains of Izu. They're small as bears go — typically 60-100 kg — and they're shy. Attacks on humans are extremely rare. But the bears are there, especially in the Amagi mountains and the interior forests, and you should know what to do.

Bear sightings are most common in spring (April-June) when bears are active after hibernation, and in autumn (September-November) when they're feeding heavily before winter. You're unlikely to see one on the coastal trails (Jogasaki, Irozaki) — those areas are too developed. The mountain trails (Amagi, Waterfalls) have a higher chance, though still low.

Trailheads in bear country usually have bells attached to posts. Ring them as you start hiking — the noise alerts bears to your presence and gives them time to move away. Some hikers carry bear bells attached to their packs. Making noise while hiking — talking with your companions, clapping periodically — is the best prevention.

If you see a bear, don't run. Back away slowly while facing the bear. Speak calmly and firmly. If the bear approaches, make yourself look big (raise your arms, stand on a rock if possible). In the extremely unlikely event of an attack, fight back — focus on the bear's face and snout. Carry a trekking pole or walking stick that could be used if necessary.

Bear spray is not commonly available in Japan and is not necessary for Izu hiking. The risk is genuinely very low — we've hiked these trails dozens of times without a single bear sighting. But being aware and making noise is simple common sense.

Onsen After Hiking — The Best Part

This is why you hike in Izu. Every trail on this list has a good onsen nearby for post-hike soaking. There's nothing quite like easing tired muscles into 42-degree mineral water while looking at the ocean or the mountains.

After the Jogasaki Coast walk, head to Ito Onsen (15 minutes by train). The public bathhouse near the river is ¥400 and has excellent water. After Mount Omuro, the ryokan near the base offers day bathing for ¥1,000 — outdoor pool with mountain views.

After the Mount Amagi traverse, Yugashima Onsen is at the eastern trailhead. It's a small local bath, nothing fancy, but the water is sulfuric and incredibly restorative after a long hike. ¥400. Bring a change of clothes — there's no rental towel service.

After the Kawazu Waterfalls trail, the foot baths along the river are right there — free, open 24 hours. For a proper soak, walk 10 minutes to the public bathhouse in town (¥400). After the Cape Irozaki walk, drive or bus back to Shimoda and use the public bath near the station (¥500), or continue north to a coastal onsen in Minami-Izu.

The combination of hiking and onsen is, in our opinion, the perfect Izu day. Hike in the morning when it's cooler and the light is good. Soak in the afternoon when your muscles need it. Eat a big dinner of local seafood. Sleep well. Repeat.

Seasonal Trail Conditions

Spring (March-May) is excellent for hiking. Temperatures are mild, wildflowers bloom along the trails, and the waterfalls are full from snowmelt. The only downside is pollen — cedar pollen in March can be intense. If you have allergies, bring medication.

Summer (June-August) is hot and humid on the coast, but the mountain trails are cooler. The Kawazu Waterfalls trail is particularly pleasant in summer — the forest canopy keeps temperatures down and you can cool off in the stream (at the designated spots). Afternoon thunderstorms are common in July and August — start hikes early and check the forecast.

Fall (September-November) is Lisa's favorite season for hiking. The humidity drops, the skies clear, and the foliage starts turning in late October. The Amagi traverse in particular is spectacular in late November when the beech trees turn gold. This is also the most stable weather period — fewer storms than summer or winter.

Winter (December-February) hiking has its own rewards. The trails are empty, the air is crystal clear, and the views extend for miles. However, higher elevations can be icy — microspikes are recommended for the Amagi traverse from January through March. The coastal trails (Jogasaki, Irozaki) are hikeable year-round with basic gear.

Trail Etiquette

Izu's trails are well-maintained thanks to local volunteer groups. Do your part by following basic trail etiquette: pack out all trash (including biodegradable items like fruit peels), stay on marked trails, yield to uphill hikers, and keep noise levels down. These trails pass through residential areas and near shrines — be respectful of local communities.

At Jogasaki in particular, the cliffs are unfenced in some sections. Don't climb over railings or venture onto unstable ground for photos. People have fallen. It's not worth it.

Photography on the Trails

Izu's trails offer exceptional photography opportunities, and each trail has its own character. The Jogasaki Coast trail is all about drama — big ocean views, rocky cliffs, the suspension bridge against blue water. Best shots are in morning light when the sun illuminates the eastern coast. Bring a wide-angle lens for the big vistas and a telephoto to isolate details.

The Kawazu Waterfalls trail is about intimacy — dappled light through forest canopy, moss-covered rocks, water in motion. A tripod is useful here for long exposures that turn the waterfalls into silky ribbons. The wooden bridges and boardwalks make good foreground elements. Overcast days are actually better for forest photography — the diffused light eliminates harsh shadows.

Mount Amagi offers the most varied photography. The forest sections have that moody, primeval feel. The ridgeline above the tree line gives you panoramic shots of the entire peninsula. On clear days, you can see Mount Fuji from certain points along the trail. The best light is early morning — start at dawn if you want the clearest views before afternoon haze sets in.

Whatever trail you're on, protect your gear. Izu's humidity can be hard on camera equipment, especially near waterfalls and onsen. Bring lens cloths, use rain covers when appropriate, and let your gear acclimate before changing lenses in humid conditions.

Trail Running in Izu

Trail runners will find plenty to love in Izu. The Jogasaki Coast Picnic Course is runnable — flat, well-maintained, with stunning views to distract you from the effort. The Kawazu Waterfalls trail is runnable downhill (take the bus to the top, run down). More ambitious runners can tackle sections of the Amagi traverse, though the full route is a very long day even for experienced trail runners.

The Izu Trail Journey is an annual trail running race that covers a 70km course across the peninsula. Even if you don't race, the course map shows you the best runnable sections. The race is held in November, when conditions are ideal.

If you're trail running, the same etiquette applies as hiking — yield to walkers, don't litter, and be aware that mountain bikers also use some of these trails (particularly around Mount Omuro). Carry more water than you think you need — Izu's humidity makes you sweat more than dry climates.