本沢温泉

2,100 m · Minamimaki, Nagano · 1.2 km from the summit of Mt. Neishi

A year-round hot-spring mountain lodge at about 2,100 m on the east side of Iodake in the Yatsugatake range, Minamimaki, Nagano. In summer, ordinary cars stop at the Honzawa Onsen entrance and guests continue on foot along the Yukawa valley trail. It is known for the open-air Unjo-no-Yu at 2,150 m and the indoor Kokemomo-no-Yu, fed by a different spring.

2026: open all year · reservation required · sleeps 100

Website: www.yatsu-honzawaonsen.com ／ Book 090-5446-1205 ／ Phone 090-3140-7312

Prices (2026)

1 night with dinner and breakfast, new building private room: ¥14,000
1 night with dinner and breakfast, main building private room: ¥12,000
1 night with dinner and breakfast, main building shared room: ¥11,000
Room only, no meals (Private room in new building): ¥11,000
Room only, no meals (Private room in main building): ¥9,000
Room only, no meals (Shared room in main building): ¥8,000

本沢温泉 weather (hourly, 14 days)

Sunrise today 06:10, sunset 16:50

		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		15	17	19	21	23	1	3	5	7	9	11	13	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	18	21	0	3	6	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	3	9	15

Temperature	°C	8°	4°	3°	1°	1°	1°	1°	0°	1°	7°	10°	11°	9°	5°	5°	5°	5°	5°	8°	11°	10°	8°	6°	6°	6°	6°	10°	13°	12°	5°	2°	-1°	-2°	-4°	2°	4°	3°	-2°	-3°	-2°	-3°	-3°	5°	8°	6°	1°	1°	1°	1°	1°	5°	6°	1°	0°	4°	7°	1°	-1°	0°	1°	-3°	-4°	4°	6°	-2°	-1°	3°	3°	-4°	-3°	5°	8°	0°	0°	7°	8°	5°	5°	10°	8°	1°	-2°	3°	7°
Precipitation	mm																2.3	8	3.9	0.4		0.7				0.1	0.1																																0.3	0.3									0.2									9	11		1.4	0.8
New snow	cm																																																										0.2	0.2									<.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	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
Wind	m/s	1	0	0	0	0	0	0	0	0	1	1	1	1	2	2	2	1	0	1	0	1	1	1	1	2	1	2	3	3	1	1	2	2	2	3	4	3	1	1	1	1	1	1	1	1	0	1	0	1	1	1	2	1	1	2	4	2	3	5	4	1	1	2	2	0	1	3	2	1	1	1	2	1	2	3	2	2	2	2	3	2	1	1	1
Wind gusts	m/s	7	6	4	4	5	5	4	4	4	5	6	7	7	10	11	11	11	10	7	6	10	9	8	9	10	10	11	12	13	11	10	11	12	12	14	15	14	11	8	8	8	8	7	7	8	6	7	8	9	9	9	11	7	5	8	17	14	15	21	23	17	8	8	11	9	8	11	13	10	7	6	7	7	8	10	14	12	16	13	13	13	8	5	7
Wind dir.		↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓

Facilities and rooms

Open: 2026: open all year
Rooms: dormitory, private rooms
Check-in: 16:00
Check-out: 08:00
Hot spring: Unjo no Yu open-air bath; free for guests, ¥1,000 for day visitors
Bath: Indoor bath “Kokemomo no Yu”; 24 hours for overnight guests, ¥1,000 for day visitors
Shop: Bath tickets sold
Parking: Honzawa Onsen entrance: 20 cars; near gate: 8 cars (4WD only up to gate)
Location: 36.012011, 138.372824

Mountains near 本沢温泉

Huts, campsites and lodging near 本沢温泉

Mountain huts

Campsites

本沢温泉テント場 0.0 km
夏沢だけかんばキャンプ場 1.7 km
ミドリ池キャンプ場 1.8 km
黒百合ヒュッテテント場 2.4 km
赤岳鉱泉テント場 3.0 km

Lodging

Karasawa Kousen 4.1 km
稲子湯 4.3 km

Mountains and hiking routes in Nagano