야마카와 온천 고스기안

♨️A Stillness Held by Mountain and River

Kumamoto · Yamakawa Onsen Kosugian

1

A Tiny 6-Room Hideaway

• 🏡Deep in the mountains of Aso Oguni, a small ryokan with just 6 rooms (5 Japanese-style, 1 Japanese-Western)
• 🌿Open the window and the green of the mountains, the garden, and the sound of the river all come right in
• 🛏️Beyond the main house, book the Annex privately for 1–6 guests, or the whole Main Building for 3–22

2

100% Source-Water Kakenagashi Private Baths

• ♨️Four private baths, all run kakenagashi-style on 100% source water, straight from the spring
• 🌊The only outdoor bath, 'Seseragi no Yu,' blends with the river and rocks running through the property
• 🛁A sulfate spring that softens the skin and is said to help with chronic skin conditions, neuralgia, and muscle pain

3

Private Baths to Suit Your Mood

• 🪨'Iwaburo,' a wide rock bath, offers an openness distinct from the outdoor bath
• 🌲'Hinokiburo,' a proper cypress tub, faces a large window onto the seasons
• 🕯️'Hajimari no Yu,' the smallest and the first ever built, suits a small party best

4

Mountain-View Japanese and Japanese-Western Rooms

• 🪟Five Japanese-style rooms — Keyaki, Sakura, Kobushi, and more — each facing the garden, sleeping up to 4
• 🛋️'Kaede,' the Japanese-Western room, has two beds plus a tatami area, sleeping up to 3
• 📺Every room has its own toilet, AC, TV, and fridge, plus free Wi-Fi and yukata among the amenities

5

Kosugi Nabe: Choose from 5 Hot Pots

• 🐎The one-night, two-meal 'Kosugi Nabe Plan' opens with the local specialty, horse sashimi
• 🥩Choose your main from 5 hot pots, including Akaushi beef sukiyaki and Asobi pork shabu-shabu
• 🍲Options run from chicken mizutaki to a tomato vegetable pot and a millefeuille-style pot

6

A Table Full of Local Ingredients

• 🥬A tomato-based vegetable pot loaded with farm-direct vegetables grown on Aso's famous spring water
• 🐖A millefeuille-style pot layering Kumamoto's Higo Asobi pork with fresh vegetables
• 🎂An anniversary plan (¥5,000) adds a cake and room decoration

7

The Annex and Main Building, All to Yourself

• 🚪Set apart from the main house, the 'Annex' is for 1–6 guests, a hideaway where you won't cross paths with other guests
• 👥The 'Main Building,' booked whole for 3–22 guests, suits clubs and workation groups, with free Wi-Fi
• ♨️The Annex's kakenagashi private baths are open freely to every guest staying

8

The Way to Aso Oguni

• 🚗About 20 minutes via National Route 387 from Kusu IC on the Oita Expressway
• 🚐A free shuttle runs between Kosugian and the 'Kurokawa Onsen' bus stop
• ✈️About 80 minutes from Aso Kumamoto Airport, or 100 minutes from JR Kumamoto Station (paid pickup available)

Kosugian, a mountain ryokan of just six rooms, offers four private baths fed entirely by kakenagashi spring water, with the river and garden all your own. Warm up with Kosugi Nabe made from local ingredients, and let the quiet of the mountains and river settle in, far from the noise of the city.

#KumamotoRyokan#AsoOguni#YamakawaOnsen#Kosugian#Kakenagashi#PrivateOnsen#Rotenburo#KosugiNabe

* This introduction was compiled from information published by each property (official website and similar sources), so some details may differ from what you find on the day. It is AI-assisted and can contain errors — please check the official website and the details shown at booking before you reserve.

From onsen etiquette to check-in — the things worth knowing first.

Check In/Check Out Policy · Check In: 15:00 · Check Out: 10:00 · Last Check In: 20:00

* These policies are the property's own text, in English; the cancellation policy shown at booking takes precedence.