Koshin Sanso

庚申山荘

1,492 m · Nikkō-shi, Tochigi · 0.7 km from the summit of Mt. Kōshin

A municipal unmanned shelter on the southern side of Koshinyama in Ashio, Nikko. It is reached from Ginzandaira via the Koshin valley, Ichino-torii and the trail beside Mizunomote-sawa, and serves routes to Koshinyama and the classic approach to Sukaisan. Following repairs, it reopened in 2026 as a free, year-round, no-reservation shelter rather than a commercial lodge.

unstaffed

Website: www.city.nikko.lg.jp ／ Phone 0288-93-3116

Prices (2026)

Emergency shelter use: ¥0

Koshin Sanso weather (hourly, 14 days)

Sunrise today 06:07, sunset 16:45

		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°	2°	3°	1°	1°	1°	3°	8°	10°	11°	8°	5°	5°	5°	6°	7°	10°	13°	12°	9°	7°	7°	7°	6°	12°	15°	13°	7°	6°	4°	3°	1°	3°	3°	2°	-1°	-1°	-1°	-1°	-1°	3°	7°	6°	1°	0°	1°	1°	1°	4°	6°	3°	2°	3°	5°	2°	1°	1°	2°	0°	-2°	4°	6°	1°	0°	5°	2°	-1°	-3°	5°	6°	-1°	1°	8°	9°	6°	7°	13°	8°	2°	-2°	4°	5°
Precipitation	mm															0.5	1.2	8	9	1.6		0.1	0.1																															0.1	0.6		0.2		0.2	1.2	1.7	0.1						0.2										4.1	8			0.3
New snow	cm																																																											1.0	1.3	<.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	<1	<1	<1	<1	<1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Wind	m/s	2	1	0	0	1	1	1	1	0	1	1	2	2	1	1	1	1	2	2	0	1	0	1	1	1	1	3	3	2	2	2	4	5	5	6	7	7	5	5	4	4	3	3	3	1	0	1	0	1	1	1	1	0	0	1	2	0	3	7	7	2	2	1	2	1	1	3	5	2	3	1	1	1	1	1	1	1	1	1	6	5	2	1	1
Wind gusts	m/s	9	7	4	4	4	4	4	4	4	4	6	8	8	6	5	6	6	9	8	5	5	5	4	5	5	5	11	11	11	8	9	14	16	18	19	23	22	21	17	16	15	14	12	11	10	6	6	6	6	6	6	7	5	3	4	7	8	9	25	26	23	9	7	9	7	6	11	17	15	9	8	6	6	4	5	8	6	8	8	21	20	18	7	7
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