Iki Retreat
Quiet luxury Japanese ryokan with modern minimalist design. Deliberately slow, deeply local. The kind of place where the pace drops within an hour of arrival and never picks back up.
Book direct on the official site to receive a complimentary private hot spring session (45 minutes, normally ¥5,500)
Why It Matters
The only Michelin 5 Pavilion ryokan on a remote island — rated in the Michelin Guide Fukuoka, Saga, Nagasaki 2019 Special Edition. The hot spring itself is remarkable: ultra-high mineral concentration (approximately 17 times the standard threshold), free-flowing at 69°C, and certified as a National Health Hot Spring — one of only three such designations in all of Kyushu. Yunomoto Bay also ranks among Japan's 100 best sunset views.
IKI RETREAT by Onko Chishin sits on the edge of Yunomoto Bay on Iki Island — a small island off Nagasaki that the Japanese have treated as sacred ground for over a millennium (it has more than 1,000 shrines). All 12 rooms face the Genkai Sea, every single one equipped with a private outdoor onsen bath fed by a 1,700-year-old golden hot spring. The design leans hard into minimalism: natural wood tones, plank beds, low furnishings, floor-to-ceiling windows. Dinner is a kaiseki affair under Executive Chef Seiichi Ota, whose cooking stays rooted in Iki ingredients — local sea urchin, abalone, Iki beef, and whatever the Genkai Sea gives up that day.
Where You'll Stay
5 room types available
Corner Japanese-Style Room
A single 15-mat tatami room positioned at a corner of the building for panoramic bay views, with a 12 sqm terrace and private outdoor onsen bath. Sleeps up to 4 guests. The most compact room type but also the most classically Japanese.
67 sqm
Junior Suite
A spacious two-room suite with dual 10-tatami Japanese-style rooms, a 22 sqm Western-style room, and a 9 sqm terrace with private natural hot spring outdoor bath. Accommodates up to 6 guests — the highest capacity room in the property.
115 sqmKAIRI Suite
The largest room in the property and the only one with a two-person hinoki (cypress wood) open-air bath. Combines a 12-tatami Japanese-style room, a 25 sqm Western-style room, and a 28 sqm living room, plus a 12 sqm terrace facing the bay. Sleeps up to 5 guests.
120 sqmPremium Japanese-Style Room
Two connected 10-mat tatami rooms — one with a futon setup, one configured as a twin bed room — plus a 10 sqm terrace and private outdoor onsen bath. Fully traditional Japanese aesthetic throughout. Sleeps up to 5.
82 sqmPremium Japanese-Western Room
Blends a 10-mat tatami room with a generous 33 sqm Western bedroom, plus a 10 sqm terrace and private outdoor onsen bath. Up to 5 guests. A good middle ground between the suites and the purely Japanese-style rooms.
82 sqmThe Property
Eat & Drink
1 venue on property
Restaurant
Spa & Wellness
Treatment Menu
On Property
How you'll actually spend your days.
Relaxed fishing directly in Yunomoto Bay in front of the property. Rods, sabiki traps, and bait provided. No experience needed.
Private boat fishing cruise in the Genkai Sea. Seasonal options include jigging, tilefishing, gomoku fishing, float fishing, and more. Equipment rental included. An assistant is on board.
Sea kayaking in the crystal-clear waters of the Iki Sea, departing from Dolphin Park (~15 min by car). Multiple departure times daily. Pick-up service available on select days.
Guided evening tour to see Genji fireflies in May. Firefly habitats on Iki are actively protected by local volunteers. Season is mainly May. Duration approximately 30 minutes.
Guided stargazing tour taking advantage of Iki Island's dark skies and clear sea air. Season and weather dependent.
A curated 3-hour island exploration covering key sites: Iki shrines, Kurosaki Fort Ruins, Monkey Rock (the most iconic photo spot on the island), Hara no Tsuji archaeological site (Isshikoku Museum), and a shochu factory tour. Available as arrival or departure transfer routing.
Explore Iki Island by bicycle. Bike rental available at the property.
An early-morning behind-the-scenes tour of Katsumoto Fishing Port auction — normally closed to the public. Departs around 5:30 AM; auction runs 6:00–6:30 AM. The fish you select can be auctioned off and served at your breakfast the same morning.
Color a traditional Oni-kite (demon kite), a Nagasaki Prefecture-designated traditional craft made from bamboo and Japanese paper. Currently only one artisan on the island continues making them. The completed kite can be shipped home.
Pottery workshop where guests create their own cup or tea bowl finished with Yunohana hot spring mineral as an accent. Work is shipped to your home after firing.
Pleasure boat cruise on Yunomoto Bay, which is ranked among Japan's 100 best sunset views. One of the property's most popular experiences.
Amenities & Practical Info
The details that matter for planning.
High-quality skincare products made from Iki island olives are provided in all rooms.
Electric vehicle charging is not available at this property.
Staff certified as onsen sommeliers who can advise on bathing technique, timing, and the mineral properties of the Yunomoto hot spring water.
Property shop selling locally made products including skincare, foods, and the property's own SHIMA craft gin distilled from Iki barley shochu.
Complimentary shuttle between Iki ports and Iki Airport and the property. Advance reservation required. May be shared with other guests.
Gym overlooking Yunomoto Bay with bikes, running machines, and walking machines. Open 6 AM–12 AM.
Each of the 12 rooms has its own private outdoor onsen bath with free-flowing, unblended source water from the 1,700-year-old Yunomoto spring. The water arrives at approximately 69°C and guests self-regulate temperature. The KAIRI Suite has a two-person hinoki (cypress) wood bath.
BUILD YOUR IKI RETREAT BY ONKO CHISHIN PLAN
Rooms, dining, spa, and resort experiences — organized into one trip plan.
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