Higashiizu is a seaside onsen town on the eastern coast of the Izu Peninsula in Shizuoka Prefecture, roughly two and a half hours from Tokyo by train. Steam rises from geothermal vents beside the Atagawa station, free-roaming ashiyu foot baths dot the streets, and traditional ryokan line a coastline where the full moon casts a luminous path across the Pacific. The town's identity is built on three pillars: its mineral-rich hot springs, a deep tradition of handmade crafts including centuries-old hanging hina doll decorations, and some of the freshest seafood on the peninsula.
Your best window for Higashiizu runs from early June through late July, and again from mid-August through early October. The early summer stretch delivers warm beach weather, long daylight hours past 7pm, and the lively Dontsuku Fertility Festival in Inatori each June. After a brief humid spike in mid-August, conditions settle into a comfortable fall shoulder season with excellent scuba diving visibility and golden pampas grass covering the Hosono Highlands. If you'd rather visit during the quieter shoulder months, late May is pleasant and uncrowded, though slightly cooler. Avoid a brief stretch in late July to mid-August when heat and humidity peak, except for a dip in late July when conditions briefly improve.
Spring in Higashiizu, Japan
Spring arrives gradually on the Izu Peninsula's east coast. Early March still catches the tail end of the Inatori Hina Doll Festival, where thousands of handmade hanging ornaments fill exhibition halls at Inatori Cultural Park, a tradition rooted in Edo-period craftsmanship. Mornings start brisk at 37.3°F (2.9°C), so bring proper layers if you plan to stroll the Hosono Highlands or walk the coastal paths before the sun warms things up. Afternoons reach highs of 52.3°F (11.3°C), comfortable enough for exploring the geothermal steam vents around Atagawa station and warming your hands at the many outdoor foot baths.
Precipitation stays infrequent through spring, with only two to three wet days on average, making it reliable weather for coastal hikes. The nearby Kawazu Cherry Blossom Festival, one of Japan's earliest, typically wraps up by early March, so plan accordingly if pink-hued riverbanks are on your list. April is the quietest month for tourism in Higashiizu, which means lower accommodation prices and elbow room at the ryokan. By May, daylight stretches past 6:45pm and the landscape greens up, though breezes pick up to their strongest of the year. Pack a windbreaker alongside your layers.
Summer in Higashiizu, Japan
Summer is when Higashiizu fully comes alive. In June, the Dontsuku Fertility Festival fills the streets of Inatori as locals carry a massive goshintai to Dontsuku Shrine, one of the more colorful and uninhibited celebrations on the entire Izu Peninsula. Highs climb to a seasonal average of 77.2°F (25.1°C), warm enough to make Atagawa You Yu Beach the center of daily life. Surfers, swimmers, and families share the sandy shoreline, and snorkeling excursions run regularly along the rocky coast.
Humidity builds through the season, peaking in July at around 68%, and rain comes on one to five days per month. June actually sees the least precipitation of summer, making it a smart arrival window. After sundown, over 800 red lanterns illuminate the Atagawa onsen district, casting the kind of warm, otherworldly glow that earned comparisons to a scene from Spirited Away. The sun doesn't set until after 7pm in June and July, giving you long evenings to soak in outdoor rotenburo baths overlooking the Pacific.
Early to mid-August brings the peak heat, with highs reaching 83.1°F (28.4°C) and lows staying warm at 69.3°F (20.7°C). This is also the busiest tourism window, so book ryokan well in advance and expect higher accommodation prices. Mountain Day falls in mid-August, adding domestic holiday travelers to the mix. Lightweight, moisture-wicking clothing is essential, and keep a folding fan handy for the humid afternoons.
Fall in Higashiizu, Japan
Fall transforms the Higashiizu landscape. The star attraction from early November onward is the golden pampas grass blanketing Inatori Hosono Highlands, 125 hectares of rolling hills accessible by bus or taxi from Izu-Inatori Station. Walking through the swaying plumes with panoramic views of Sagami Bay below is one of the most distinctive seasonal experiences on the peninsula. This is also when scuba diving reaches its best conditions for the year, with warm sea temperatures combining with excellent underwater visibility.
Daytime highs average 61.2°F (16.2°C), energizing weather for hiking the coastal trails and exploring the highland plateau. Mornings drop to 46.2°F (7.9°C), so layering remains important, especially for early starts. Precipitation picks up compared to summer, with showers on two to five days, and October tends to be one of the wetter months. A packable rain jacket earns its space in your bag.
Tourism stays strong through fall, making it the second busiest period, particularly around Sports Day in mid-October when domestic travelers head to the coast. Respect for the Aged Day and the Autumnal Equinox in late September also bring short holiday surges. On clear full-moon nights, head to the Hokkawa coast for the fabled Moon Road, where moonlight traces a silvery path across the darkened ocean, one of Japan's recognized top 100 moon-viewing locations. Accommodation runs slightly above average, so booking a week or two ahead is wise.
Winter in Higashiizu, Japan
Winter in Higashiizu is for onsen devotees. The town has welcomed hot spring visitors escaping the cold for generations, and the experience of slipping into a steaming outdoor rotenburo while snow dusts the surrounding hillsides is deeply satisfying. Highs average just 33.4°F (0.8°C) with lows dropping to 21.7°F (-5.7°C), and significant snowfall, heaviest in mid-February, blankets the hills. Pack serious cold-weather gear if you visit.
Daylight hours shrink to around nine hours, with sunset arriving before 4pm in December. Precipitation falls fairly consistently, with two to five wet days per month, often as snow. Despite the cold, the east coast of Izu is somewhat sheltered from harsh westerly winds, and blue-sky days are common between storms. This is peak season for spiny lobster, navel oranges, and strawberry picking, so the local food alone justifies the trip for culinary travelers.
Tourism drops to its lowest levels, and some smaller accommodations close entirely. The Inatori Hina Doll Festival begins in mid-January and runs through early March, displaying approximately 11,000 hanging doll ornaments in towering arrangements, a craft tradition stretching back over a century. Interactive workshops let you try your hand at making the decorations yourself. If you visit during February, the nearby Kawazu Cherry Blossom Festival draws nearly a million visitors to see Japan's earliest blooming sakura along the Kawazu River, just one train stop south.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Higashiizu, Japan
Getting to Higashiizu from Tokyo involves taking the Tokaido Shinkansen to Atami, transferring to the JR Ito Line to Ito Station, then riding the Izukyu Railway south to stations like Izu-Atagawa or Izu-Inatori. The full journey takes roughly two and a half to three hours. A rental car opens up access to inland attractions like Hosono Kogen Highlands, but the train covers most coastal highlights comfortably.
Japan is one of the safest countries for travelers, and Higashiizu is no exception. Standard precautions apply: watch your footing on wet coastal trails, stay aware of wave conditions at rocky beaches, and carry rain gear year-round since weather can shift quickly on the peninsula. Typhoon season runs from roughly August through October, so monitor weather forecasts during those months and be prepared for possible train delays.