Curated Japan inns and hotels by region — browse by location, filter by features. Currently 20 properties, all cross-checked against official sources on June 2026.
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How this page works: Compiled from official booking systems, Michelin Guide, Hitou Association, and other verifiable sources. All prices: 2 people sharing one room, 2 meals (dinner + breakfast), tax included. The WaTabi editorial team has not personally stayed at these inns.
Kanto · Tokyo OtemachiLuxury HotelLuxuryOnsenCity Onsen
One of the very few hotels in central Tokyo with a real natural onsen — drawn from 1,500m underground (ancient seawater aquifer); 17F gender-segregated baths
17-story vertical ryokan: all 84 rooms feature tatami floors + hinoki tubs + shoji screens; just 6 rooms per floor, each floor has a free 'Ochanoma' lounge serving tea, sake, and snacks
The first Koseki Kichizaemon moved here from Yonezawa in the Keicho era; the house became a cure-bath inn in the Tenpo era and took the Koseki-ya name then
5F 'Taisho Romance' renovated rooms (2016) suit travelers uncomfortable with traditional floor futons
Founded in 1932 (Showa 7), 94 years of operation — one of Gero Onsen's oldest established properties and watabi's central-Japan heritage anchor
One of Japan's Three Famous Hot Springs (alongside Kusatsu and Arima) — pairs with our Kusatsu Naraya pick for a Big-Three contrast (Kusatsu's acidic sulfur vs Gero's clear alkaline)
Founded in 1877 (Meiji 10) — one of the oldest established inns directly facing the Yubatake
Draws from the Shirahata source — Kusatsu's oldest, said to have been discovered by Minamoto no Yoritomo in 1193; the inn describes the water as free-flowing from the source 24 hours a day
Three baths: 7F open-air 'Choyozan', 7F 'Kurodake' viewing bath (40m glass facade overlooking the gorge), and 2F 'Keigetsu' secret onsen atmosphere
Faces Mt. Kurodake and Sounkyo's columnar basalt cliffs — staging point for Japan's earliest autumn foliage (late Sept) and the Jan-Feb Ice Waterfall Festival
30-meter hand-carved cave bath — chiseled by founder Goto Tetsuya over 13 years, per the inn's own wording; the literal birthplace of modern Kurokawa Onsen
The Iwato Bath is the original outdoor onsen of Kurokawa — the cornerstone of the village's 'one inn philosophy'
2,311 rooms across 35 floors — the hotel calls itself "one of Japan’s largest" rather than the largest; its site marked a 7th anniversary in September 2026.
The big bath is an artificial hot spring, and the hotel says so itself — its "Komeiseki" bath is labelled (artificial onsen) on the official page, alongside an open-air bath and a microbubble bath.
Two stations at the door — the hotel states 1 min from Bashamichi exit 1C and 3 min from Sakuragicho New South exit.
The corner River View Twin is the only room here with a separate bath and toilet — 22㎡, facing the Ooka River and Landmark Tower; the hotel flags this room type specifically.
Direct 3F connection from Minato Mirai Station — no need to step outside; Queen's Square mall directly attached. Best pick for rainy days or heavy luggage
Part of Queen's Square Block 24 — 6 restaurants, banks, conbini, drugstores all within 1-min walk inside the complex
Opened 1927, Yokohama's oldest luxury hotel — rebuilt 4 years after the Great Kanto Earthquake; staying here feels like sleeping inside a museum
Birthplace of Naporitan (Japanese ketchup spaghetti) — invented by the head chef during postwar US occupation. Coffee House The Cafe still serves the original