Izu Peninsula Guide: Towns, Onsen & Coastal Scenery Near Tokyo

What Makes the Izu Peninsula Worth Visiting

The Izu Peninsula (伊豆半島) extends south from Shizuoka Prefecture into the Pacific, roughly 100 kilometers from Tokyo. It packs onsen towns, volcanic coastline, mountain trails, and summer beaches into a compact area — close enough for a weekend trip yet varied enough for a week-long stay.

What separates Izu from other onsen regions is the diversity within a short distance. The east coast has developed resort towns with direct train access from Tokyo. The west coast has dramatic sea caves and sunsets over Mt Fuji. The central highlands have forest onsen and volcanic peaks. The southern tip has historic port towns and white-sand beaches. Most travelers pick one or two areas based on interest and time — but understanding the full layout helps you make a better choice.

This article covers the peninsula at overview level. For curated recommendations, see our Izu Japan highlights. Izu is part of the broader Shizuoka city guide destinations covered across multiple guides.

Understanding Izu's Geography: Four Distinct Areas

Think of the Izu Peninsula as four zones, each with its own character and access considerations.

East Coast: Developed Onsen Towns and Beaches

The east coast runs from Atami through Ito and down to Shimoda. This is the most accessible part of the peninsula — the JR Ito Line and Izukyu Line (伊豆急行線) connect these towns directly from Tokyo. Onsen resorts, seafood restaurants, and coastal walks dominate here. Atami and Ito are the gateway towns; Shimoda at the southern end has more of a remote, laid-back feel.

West Coast: Dramatic Cliffs and Quiet Villages

The west coast faces Suruga Bay and offers a completely different experience. Dogashima (堂ヶ島) has sea caves you can explore by boat, and the sunset views over the bay — with Mt Fuji silhouetted on clear days — are among the finest in Shizuoka. This side is quieter, less developed, and harder to reach without a car. Many visitors on Reddit and TripAdvisor cite the west coast as the hidden gem of Izu.

Central Highlands: Forest Onsen and Volcanic Peaks

The interior is anchored by Shuzenji Onsen (修善寺温泉), a historic hot spring town with a 1,200-year-old temple. The highland area also includes Mt Amagi hiking trails and rural villages. This zone feels distinctly different from the coastal areas — forested, quiet, and more traditionally Japanese.

Southern Tip: Shimoda and the End of the Line

Shimoda sits at the end of the Izukyu Line and marks the transition between the developed east coast and the wilder south. The town has historical significance as the port where Commodore Perry's ships landed in the 1850s, and the preserved Edo-era architecture along Perry Road reflects this history. The beaches here — Shirahama in particular — are some of the best on the peninsula. For a deep dive, see our Shimoda port town guide.

For orientation, Numazu sits at the base of the peninsula on the northwest side, serving as a gateway if you are approaching from the west.

East Coast: Atami, Ito, and the Train-Accessible Route

The east coast is where most first-time Izu visitors end up, for good reason. The train line runs along the coast, stopping at each major town, and the journey itself — with Pacific Ocean views from the right-hand side of the train — is part of the experience.

Atami is the closest to Tokyo and the largest resort town. It has the most hotel options, the widest dining selection, and the easiest access (45 minutes by Shinkansen from Tokyo Station). For a complete guide, see our Atami resort guide.

Ito is 30 minutes further down the line from Atami and offers a more relaxed atmosphere. The Jogasaki Coast (城ヶ崎海岸) — volcanic cliffs with a suspension bridge formed by the eruption of nearby Mt Omuro (大室山) — is the standout natural attraction. The suspension bridge is free to access, open 9:00–16:45. Mt Omuro itself has a lift ride (adults ¥500 / ~$3, children ¥250) for panoramic views. See our Ito city coastal charm guide for more.

Shimoda is at the end of the line, about 2.5 hours from Tokyo via Atami and Ito. It has the best beaches on the east coast and a distinct historical character.

West Coast: Dogashima Caves and Suruga Bay Sunsets

The west coast is the part of Izu most international visitors miss — and arguably the most scenic. Dogashima's sea caves (堂ヶ島洞窟) are the headline attraction. Boat cruises navigate through rock formations and into caves where light filters through openings above. The dramatic coastal geology here is different from anything on the east coast.

The practical challenge is access. There is no train service to the west coast. Buses run from Shuzenji or Shimoda, but they are infrequent and the journey takes time. A rental car is the most practical option — pick up in Ito or Shimoda and drive the coastal road. The full peninsula loop is approximately 150 kilometers and takes 4–5 hours by car, not counting stops.

If you have time for only one detour from the east coast, the Dogashima caves are the strongest argument for renting a car.

Central Highlands: Shuzenji Onsen and Mountain Trails

Shuzenji Onsen (修善寺温泉) is the peninsula's most traditional onsen town. According to the Shizuoka Prefecture tourism site, it anchors the central highlands with a 1,200-year history. The temple, bamboo grove, and riverfront ryokan create the kind of atmosphere that feels distinctly different from the coastal resort towns.

Shuzenji is accessible by bus from Mishima Station (about 30 minutes), which connects to the Tokaido Shinkansen. This makes it a reasonable day trip from Tokyo without needing a car.

The surrounding area includes Mt Amagi hiking trails and the Izu Skyline driving route, which offers ridgeline views across the peninsula. Autumn foliage at Shuzenji is popular — expect crowds in late November.

Seasonal Guide: When to Visit Izu

Season	Months	Highlights
Late Winter	Feb–Mar	Kawazu cherry blossoms — Japan's earliest sakura variety
Spring	Apr–May	Mild weather, coastal walks, fewer crowds
Summer	Jul–Aug	Beach season, Shirahama and Ito beaches, fireworks
Autumn	Oct–Nov	Shuzenji foliage, hiking weather, quiet onsen towns
Winter	Dec–Jan	Onsen-focused stays, Mt Fuji views from west coast

The Kawazu Cherry Blossom Festival (河津桜) in February–March is Izu's most distinctive seasonal event. According to the Kawazu Tourism Association, these trees bloom weeks before standard cherry blossoms, drawing crowds to the riverside walk in the small east-coast town. For details, see our Kawazu cherry blossom town guide.

Summer is peak season for beaches but also the most crowded and humid period. Spring and autumn offer the best balance of weather and crowds. Winter is ideal for onsen-focused trips — the towns are quiet and the hot spring water feels best in cold weather.

Getting Around: Train vs Car on the Peninsula

By Train: JR Ito Line and Izukyu Line

The east coast is well served by rail. From Tokyo, take the Tokaido Shinkansen to Atami (45 minutes, approximately ¥4,070), then transfer to the JR Ito Line (Atami to Ito, 30 minutes). The Izukyu Line (伊豆急行線) continues from Ito to Shimoda along the coast — this is a private railway, so JR Pass does not cover it. Budget approximately ¥1,620 for the Ito–Shimoda leg one way.

The limited express "Odoriko" (踊り子) runs directly from Tokyo to Shimoda, bypassing transfers. It is a scenic ride but takes about 2.5 hours total.

By Car: Peninsula Loop and Driving Times

A car unlocks the west coast and interior areas that trains do not reach. Typical driving times from Tokyo:

Route	Distance	Driving Time
Tokyo → Atami	~100 km	~1 hr 40 min
Atami → Ito	~25 km	~30 min
Ito → Shimoda	~50 km	~1 hr
Shimoda → Dogashima (west coast)	~40 km	~1 hr 15 min
Full peninsula loop	~150 km	~4–5 hr

Rent from Ito or Shimoda if you arrive by train and want to explore the west coast. Winter driving on highland roads requires caution — check for road closures and ice conditions in advance.