The Izu Peninsula: Coastal Scenery and Hot Springs Near Tokyo

Published October 15, 2026 at 10:36 AM JST | By Tokyo Paul

Just a short train ride from Tokyo, the Izu Peninsula juts into the Pacific like a green thumb, and it has been a favorite getaway for generations. Here you will find steaming hot springs, cliffs shaped by ancient lava, quiet fishing towns and cherry trees that bloom while much of Japan is still in winter. This guide walks through how the peninsula formed, the best-known onsen (Japanese hot spring) towns, the seasonal highlights, and practical tips for planning your own trip. Whether you want a relaxing overnight stay or a full week of coastal exploring, Izu rewards slow travel.

A Peninsula Born From Volcanoes

Izu has one of the most interesting origin stories of any place near Tokyo. According to UNESCO, the peninsula began as a chain of volcanic islands that formed roughly 20 million years ago far to the south, in tropical waters. Over time those volcanic landmasses drifted north and collided with the main part of Japan about 600,000 years ago, a meeting that is still shaping the land today. That slow collision is a big reason the area is full of hot springs, dramatic hills and volcanic scenery.

In 2018 the whole peninsula was recognized as the Izu Peninsula UNESCO Global Geopark, a label given to places with landscapes of special geological value. The geopark includes a coastline of about 318 kilometers, with steep cliffs, hidden bays and deep waters just offshore in Suruga Bay and Sagami Bay. A dormant volcano called Omuro, with a nearly perfect cone shape, is one of the landmarks. The Amagi mountains run through the center of the peninsula, with Mount Amagi's forests and ridges offering a cool contrast to the warm coast.

Izu is also part of the Fuji-Hakone-Izu National Park, and on clear days the peninsula offers views toward Mount Fuji. Fishing, farming and tourism are the main local activities. The mix of mountains and sea gives Izu a wide range of climates, so you can pass from coastal sunshine to misty forest in a short drive. For travelers who like both nature and comfort, that variety is a big part of the charm.

Hot Spring Towns to Know

Atami is the best-known gateway. This seaside resort town has been famous for its hot springs since the 8th century, and its name is often translated as "hot ocean." Atami is a stop on the Tokaido Shinkansen (bullet train) line, so it is the quickest way to reach the peninsula from Tokyo. The town climbs a hillside above the bay, and many visitors enjoy its art museums, a hilltop replica castle and old-fashioned seaside streets. The MOA Museum of Art, which holds the collection of Mokichi Okada, is one of the town's cultural highlights.

Shuzenji, in the middle of the peninsula, has a very different feel. This old hot spring town is nicknamed the "Little Kyoto of Izu" and sits in a mountain valley along the Katsura River. A stone-paved bamboo path called Chikurin no Komichi runs beside the river, lined with teahouses and small shops, and it is lit up in the evening. The riverside Tokko no Yu hot spring is considered the source of the town's onsen, and visitors can look at it, though bathing there is not allowed. Shuzenji is roughly two hours from Tokyo, which makes it a realistic day trip as well as a comfortable overnight stop.

Other onsen areas are scattered along both coasts, including Ito on the east side and Izusan, a hot spring said to have been discovered more than a thousand years ago. Many ryokan (traditional inns) and hotels offer open-air baths with ocean or forest views. If you are new to onsen culture, the basic rules are simple. Wash and rinse thoroughly at the washing stations before stepping into the shared bath, keep your small towel out of the water, and check the inn's policy if you have tattoos, since rules vary from place to place.

Cherry Blossoms, Wasabi and History

One of Izu's most famous seasonal events happens in the coldest part of the year. In the town of Kawazu on the east coast, a cherry variety called Kawazu-zakura blooms in February, well before the usual cherry blossom season in late March and early April. This variety is a natural cross of two other cherry types. It was discovered in 1955 and was officially recognized as its own variety in 1974. Its deep pink flowers line the Kawazu River, and a festival with food stalls and evening lighting along the river usually runs through February and sometimes into early March, depending on how the blossoms develop.

Izu is also one of Japan's well-known wasabi growing regions. Wasabi has been cultivated on Mount Amagi for well over a hundred years, and the cool, clear mountain streams suit this fussy plant. Look for fresh grated wasabi served with sashimi, or try wasabi-flavored snacks and ice cream as a fun souvenir. Fresh seafood is another strength, since the surrounding sea brings in a wide variety of fish.

At the southern tip of the peninsula, Shimoda has a special place in Japan's story of opening to the wider world. In 1854, Commodore Matthew Perry arrived with his "Black Ships," and Shimoda became one of the first ports opened to international contact. Today the town celebrates that heritage with the Black Ships Festival, usually held in mid-May, when streets fill with people in kimono and historical costume. Events often include a re-enactment of a treaty signing and a free evening concert. Shimoda also has several beaches that are popular for summer swimming and for surfing throughout the year.

Beaches, Cliffs and Coastal Walks

The Izu coastline is wonderful for people who like to be outdoors. The northern coves tend to have calmer water, which suits families and casual swimmers, while the southern beaches have larger waves that attract surfers and bodyboarders. Snorkeling and diving are popular, and July through September is generally the best stretch for water activities. Sea kayaking tours can reach cliffs and caves that are hard to see from land.

The Jogasaki Coast, near the town of Ito, is a favorite walking area. It was formed by lava from the Omuro volcano that erupted more than 4,000 years ago, and the dark rock meets the waves in jagged formations. A trail of about nine kilometers links a gentler beach walk with a longer nature course. Along the way, the Kadowaki suspension bridge stretches about 48 meters across a rocky inlet, and the nearby Kadowaki Lighthouse has a free observation deck with 360-degree views.

Inland, hikers can climb Mount Amagi through evergreen forests, while guided geopark tours visit places such as the Ryugu sea cave, where light filters in through a wide opening. If you only have time for one coastal stop, pick a spot with a short walking trail and plan to be there in good light, since late afternoon makes the sea and cliffs glow.

Practical Tips for Visiting Izu

Getting around is easier if you plan around the transport map. The Tokaido Shinkansen stops at Atami and Mishima, and from there the JR Ito Line and the Izu Kyuko Line run down the east coast toward Shimoda, though trains can be infrequent. The Sunzu Line connects to Shuzenji. The west coast has no train service, so buses, taxis or a rental car are the best options there. Several scenic drives, including the Izu Skyline, offer wide views for those who prefer to drive.

Spring and autumn are comfortable for walking, February brings the early cherry blossoms, and summer is the beach season. Weather on the coast can change quickly, so a light jacket and sturdy walking shoes are useful in most months. Weekends and holidays can be busy in popular towns like Atami, so booking inns ahead is wise. If you plan to use public transport, check timetables before you travel and leave a little buffer for connections.

A good rule is to base yourself in one or two towns rather than racing around the whole peninsula. For example, you could pair Atami with a day on the Jogasaki Coast, or combine Shuzenji with a stay in Kawazu in late winter. Many ryokan serve dinner and breakfast, which turns the inn itself into a highlight of the trip.

Quick Takeaways

Izu works because it offers so much variety within easy reach of Tokyo. You get volcanic scenery recognized by UNESCO, a long list of hot spring towns, cherry blossoms in February, fresh wasabi and seafood, and coastal trails with real wow moments. Choose a few places that match your interests, allow time for a long soak, and let the pace of the peninsula slow you down.

Above all, travel here with a flexible spirit. Pack light layers, bring a small towel for the onsen, and keep an eye on the weather. However many days you have, Izu is a friendly introduction to Japan's coastal side, and it is easy to start planning a return visit before you even leave.