Nanatsuishi-Koya Lodge

七ツ石小屋

1,591 m · Tabayama, Yamanashi · 0.4 km from the summit of Mount Nanatsuishi

Small room-only hut at 1,597m, partway up the Kamosawa route to Kumotoriyama in the Okutama mountains. It is open 365 days a year with a keeper always present, and Mount Fuji is in view. From Okutama Station on the JR Ome Line, Nishi-Tokyo buses run to Kamosawa or Tozura; drivers start from the Tabayama village car park. The hut has no mains electricity, water, delivery service or refuse collection: it runs on solar power, natural spring water, a bio-toilet and supplies carried up on foot. No meals are served — guests bring their own food, pot and stove. The hut sleeps 10 and the campsite 20, both by reservation made by 3pm the previous day. The piped spring water is free for any passing hiker, and a wood stove is lit in winter. It makes the least strenuous base for an out-and-back climb of Kumotoriyama from Kamosawa.

2026: open all year · reservation required · sleeps 10

Website: nanatsuishigoya.com ／ Phone 090-8815-1597

Prices (2026)

Room only, no meals (Per person per night): ¥4,000
Tent camping (per person per night): ¥1,000

Nanatsuishi-Koya Lodge weather (hourly, 14 days)

Sunrise today 06:08, sunset 16:48

		Tue, 11/3		Wed, 11/4											Thu, 11/5								Fri, 11/6								Sat, 11/7								Sun, 11/8								Mon, 11/9							Tue, 11/10				Wed, 11/11				Thu, 11/12				Fri, 11/13				Sat, 11/14				Sun, 11/15				Mon, 11/16				Tue, 11/17
Japan time		21	23	1	3	5	7	9	11	13	15	17	19	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	18	21	0	3	6	9	12	15	21	3	9	15	21	3	9	15	21	3	9	15	21	3	9	15	21	3	9	15	21	3	9	15	21	3	9	15	21	3	9	15	21

Temperature	°C	6°	5°	5°	5°	5°	5°	5°	7°	7°	6°	5°	4°	5°	6°	6°	6°	8°	13°	11°	8°	7°	6°	6°	6°	13°	17°	14°	9°	6°	4°	1°	3°	9°	11°	9°	3°	2°	1°	1°	0°	7°	9°	6°	3°	2°	2°	3°	3°	5°	7°	5°	3°	1°	2°	5°	2°	-2°	4°	4°	-3°	-1°	5°	6°	2°	-2°	7°	8°	-1°	-1°	5°	6°	0°	-1°	7°	9°	7°	6°	13°	13°	3°	3°	3°	4°	2°
Precipitation	mm	2.0	1.4						0.1		0.6	0.8	1.4	3.4	10	15	7	1.3										0.3	0.6	0.1																	0.3	0.2	0.8	0.1	0.3	0.3	1.2	2.5	0.7	0.2	0.1																				6	15		0.3
New snow	cm																																																					<.1	<.1
Snow depth	cm	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	<1	<1	<1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Wind	m/s	0	1	1	1	1	1	1	1	1	2	1	1	0	1	1	1	2	1	1	1	1	2	2	1	0	1	1	1	1	1	1	0	1	1	2	1	0	0	0	0	1	1	2	1	1	1	1	0	1	2	1	1	1	1	2	1	1	6	4	1	0	1	2	1	1	3	2	0	0	1	1	1	1	1	1	1	1	0	4	3	0	1	2	1
Wind gusts	m/s	2	3	4	4	3	4	4	6	6	5	6	5	5	5	5	7	7	6	5	5	6	8	9	9	4	6	6	5	3	4	5	4	5	7	8	6	3	3	3	3	4	6	7	6	5	7	7	6	5	7	7	5	5	5	8	8	6	21	23	15	5	5	8	7	4	10	14	8	3	4	7	5	4	6	11	7	9	9	11	16	8	4	7	6
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Facilities and rooms

Open: 2026: open all year
Rooms: dormitory
Bedding: provided
Water: Piped natural spring water, free for everyone (sink in summer, stored water in winter)
Toilet: Bio-toilet (contribution requested)
Heating: Wood stove in winter
Self-catering: Self-catering hut (bring ingredients, camping cookware and stove; pots and stoves available to rent for groups of 4 or more)
Shop: Bottled drinks, hot drinks, trail snacks, alcohol (hut guests and campers only)
Location: 35.827587, 138.965651

Nanatsuishi-Koya Lodge

Prices (2026)

Nanatsuishi-Koya Lodge weather (hourly, 14 days)

Facilities and rooms

Mountains near Nanatsuishi-Koya Lodge

Huts, campsites and lodging near Nanatsuishi-Koya Lodge

Mountain huts

Campsites

Lodging