Koku Inc. Launches Two-Day Izu Oshima Volcano and Hot Spring Package From Tokyo

Hikers cross the lava fields on the Mt. Mihara crater trail, Izu Oshima, with the sea and a distant Mt. Fuji beyond.

Hikers cross the lava fields on the Mt. Mihara crater trail, Izu Oshima, with the sea and a distant Mt. Fuji beyond.

The open-air hot spring bath at Oshima Onsen Hotel, looking out to Mt. Mihara.

The open-air hot spring bath at Oshima Onsen Hotel, looking out to Mt. Mihara.

A seasonal seafood dinner course served at Oshima Onsen Hotel.

A seasonal seafood dinner course served at Oshima Onsen Hotel.

A single two-day package bundles Izu Oshima's Mt. Mihara crater, an onsen hotel stay, and round-trip jet ferry from Tokyo.

After just a 45-minute hike, a huge crater opens up in front of you, and the hot spring below is fed by that same volcano. It's still part of Tokyo, but the scenery is nothing like the city.”
— Eibu Sato
TOKYO, JAPAN, August 25, 2026 /EINPresswire.com/ -- Travelers who have already been to Japan tend to associate Tokyo with its skyline rather than its volcanoes. Yet Izu Oshima (locally often called simply "Oshima Island"), an island administratively part of Tokyo Metropolis, is home to Mt. Mihara, one of Japan's most accessible active volcanoes. Its crater is a roughly 45-minute climb on foot, and the island can be visited from central Tokyo on a trip as short as two days and one night.

A new package tour, "Volcano Hike & Onsen Escape – Izu Oshima," makes the trip bookable as a single two-day, one-night itinerary. Priced from ¥36,830 to ¥97,620 per adult (approximately NT$7,400 to NT$19,600, or HK$1,800 to HK$4,800, at current exchange rates), depending on season, ferry class, and room type, it bundles round-trip ferry, a hot spring hotel stay with two meals, and a port-to-hotel shuttle into a single online booking. It went on sale in August 2026. Travelers can book the Izu Oshima volcano and hot spring package directly online.

The package is offered through Tokyo Islands, the English-language travel platform for Tokyo's Izu Islands, and its booking site Tokyo Islands Explorer, both operated by Koku Inc. (株式会社コク), a Tokyo Governor-registered travel agency (Registration No. 2-8991). Even on a short itinerary, travelers reach the island quickly from Tokyo and arrive in a volcanic landscape markedly different from the capital.

Package Highlights

The hike to Mt. Mihara's crater takes about 45 minutes on foot, crossing the volcano's lava fields at a self-guided pace. On clear days, Mt. Fuji is visible from the summit.

Following the hike, travelers stay one night at Oshima Onsen Hotel, located at the foot of the volcano. The hotel offers natural hot spring baths, including an open-air bath facing Mt. Mihara. It is a short drive from the trailhead, with a shuttle connecting directly to the port, and both dinner and breakfast are included.

Dinner features Camellia Oil Fondue, a dish made with oil pressed from camellia trees grown on Izu Oshima.

Travelers reach the island by one of two ferries. The high-speed jet ferry takes about 1 hour 45 minutes from Tokyo, or 45 minutes from Atami, keeping the trip to two days and one night. A large passenger ferry is also available, taking about 6 hours from Tokyo; because its outbound sailing runs overnight, travelers who choose it spend one night aboard the ferry and one night at the hotel, extending the same package into a three-day trip. A shuttle bus connects the port to the hotel either way.

Trip Details

Package name: Volcano Hike & Onsen Escape from Tokyo by Jet Ferry – Izu Oshima

Duration: 2 days / 1 night, self-guided (no tour escort)

Departure point: Tokyo

Destination: Oshima Island (Izu Oshima), Tokyo Prefecture

Included: Round-trip ferry (jet ferry or large passenger ferry), port-to-hotel shuttle, one-night accommodation with two meals, bathing tax, and accommodation tax

Ferry options:
Jet ferry: about 1 hour 45 minutes from Tokyo, or 45 minutes from Atami, keeping the trip to two days and one night;
Large passenger ferry: about 6 hours from Tokyo, with an overnight outbound sailing, which extends the trip to three days and two nights (one night aboard the ferry, one night at the hotel)

Price: ¥36,830–¥97,620 per adult (approximately NT$7,400–NT$19,600, or HK$1,800–HK$4,800, at current exchange rates), depending on season, ferry class, and room type

Travel period: July 5, 2026 – July 4, 2027

Booking:
https://explorer.tokyoislands.jp/full_tour/oshima/oshima-volcanic-island-escape-onsen-hotel

"After just a 45-minute hike, a huge crater opens up in front of you, and the hot spring below is fed by that same volcano," said Eibu Sato, Representative of Koku Inc., which operates Tokyo Islands Explorer. "At night you can often see the stars, sometimes the moon. It's still part of Tokyo, but the scenery is nothing like the city, and not many people know it yet. This package is built to make that trip as simple to book as possible."

About Izu Oshima (Oshima Island in Tokyo)

Izu Oshima is located within about two hours of central Tokyo by sea. Despite being part of Tokyo Metropolis, the island's landscape is dominated by Mt. Mihara, an active volcano, and by camellia groves that supply the oil used in local dishes such as Camellia Oil Fondue.

Video: Tokyo’s Secret Volcanic Islands: Less Than Two Hours From Central Tokyo
https://youtu.be/URHAHye636s?si=weO6zY6ZV8-RzS09

About Tokyo Islands Explorer

Tokyo Islands Explorer offers tour packages to the Tokyo Islands, including ferry-and-stay combinations and standalone ferry bookings across Tokyo's nine outlying islands: Izu Oshima, Toshima, Niijima, Shikinejima, Kozushima, Miyakejima, Mikurashima, Hachijojima, and Aogashima.

Tokyo Islands Explorer is operated by:

Company Name: Koku Inc. / 株式会社コク

Registration Number: Tokyo Governor Registered Travel Agency No. 2-8991

Address: WTC Annex 11F, 2-3-8 Hamamatsucho, Minato-ku, Tokyo 105-0013, Japan

Representative: Eibu Sato

Certified Domestic Travel Services Manager: Ai Nakagawa

Fujico
Koku Inc. / Tokyo Islands Explorer
+81 50-1724-5244
info@tokyoislands.jp
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