KAI Anjin (界 アンジン) takes its name from the word for a pilot — the navigator who guides a ship into harbour — and its theme is the Age of Discovery. It stands in Ito on the Izu Peninsula, Shizuoka Prefecture, and its 45-room bath halls sit on the top floor looking out over the Pacific Ocean, from shimmering water in the morning to deep reds and oranges at sundown.
Where KAI Anjin is
The address is 5-12 Nagisa-cho, Ito, Shizuoka 414-0023 — on the coast at Ito, on the east side of the Izu Peninsula, facing the open Pacific rather than a sheltered bay. Rooms take 1 to 4 guests, check-in is 14:30 and check-out is 11:00.
Ito is the town associated with William Adams (三浦按針, Miura Anjin), the English navigator who was shipwrecked in Japan in 1600, became a retainer of Tokugawa Ieyasu, and was granted land here. The ryokan leans into that maritime history: the interiors reference the ships of the Age of Discovery, and there is a short film screened in the evenings about Miura and the art of shipbuilding.
Getting there
By car
From the Tomei Expressway, take the Numazu Interchange and continue south down the Izu Peninsula's east coast to Ito. The property offers an exclusive car-rental discount. Having a car is the easiest way to see Izu — the peninsula's viewpoints and fishing ports are strung along the coast road.
By train
Ito is served by the JR Ito Line from Atami, which is itself on the Tokaido Shinkansen. From Tokyo it is a straightforward shinkansen-and-local combination.
The baths — the reason to book this one
The bathing is on the top floor, and it faces the Pacific Ocean. That orientation is what separates KAI Anjin from the mountain ryokan: you are soaking at height, looking out to open water, and the view changes from morning to sunset in a way guests consistently describe as the highlight of the stay.
Ito and the Izu east coast
Ito itself has an onsen history of its own, with a hot-spring town centre and the Orange Beach shoreline. The nearby Anjin Memorial Park and the Izu Granpal area extend the maritime story, and the peninsula's interior — with its wasabi fields and waterfalls — is a short drive inland.
Frequently asked questions
Does KAI Anjin really overlook the ocean?
Yes. The bath halls are on the top floor and look out over the Pacific — the property describes the view as running from shimmering morning water to deep reds and oranges at sundown.
Is KAI Anjin the same as KAI Ito?
They are separate properties, both in Ito on the Izu Peninsula. KAI Anjin is themed around the navigator William Adams and the Age of Discovery.
How many guests per room?
1 to 4 guests, across 45 rooms.
Planning an Izu trip around it
KAI Anjin makes a strong first or last night on an Izu loop — ocean baths, then the peninsula by car. Every itinerary we build is designed from scratch around your dates and your group; there is no fixed departure and no group to join: have an Izu itinerary designed for you — free, no obligation.
We plan private journeys for travellers worldwide, in any destination. Nothing about our trips is off-the-shelf.
For live availability and rates, see KAI Anjin on Trip.com. To ask a person, message us on WhatsApp — we usually reply the same day.
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