Group of complex volcanoes on the island of Honshu
Mount Nasu (那須岳, Nasu-dake) is a group of complex volcanoes located in the northeast part of Nikkō National Park, Japan. The tallest peak is Sanbonyari Peak at a height of 1,916.9 m (6,289 ft). Mount Nasu is one of the 100 Famous Japanese Mountains.
Major peaks
Mount Nasu has the following major peaks:
- Sanbonyari Peak – 1916.9 m
- Chausu Peak – 1915 m
- Asahi Peak – 1896 m
- Minamigatsusan – 1776 m
- Kuro-oya Peak – 1589 m
These peaks are known collectively as Nasu Five Peaks (那須5岳, Nasu-Go-Take).
Climate
Climate data for Mount Nasu (1991−2020 normals, extremes 1976−present)
|
Month
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
Year
|
Record high °C (°F)
|
12.7 (54.9)
|
16.8 (62.2)
|
21.1 (70.0)
|
26.8 (80.2)
|
29.6 (85.3)
|
30.3 (86.5)
|
31.8 (89.2)
|
32.2 (90.0)
|
29.5 (85.1)
|
24.6 (76.3)
|
20.0 (68.0)
|
17.4 (63.3)
|
32.2 (90.0)
|
Mean daily maximum °C (°F)
|
1.9 (35.4)
|
2.7 (36.9)
|
6.8 (44.2)
|
13.0 (55.4)
|
18.2 (64.8)
|
20.7 (69.3)
|
24.3 (75.7)
|
25.4 (77.7)
|
21.4 (70.5)
|
16.1 (61.0)
|
10.9 (51.6)
|
5.1 (41.2)
|
13.9 (57.0)
|
Daily mean °C (°F)
|
−1.7 (28.9)
|
−1.3 (29.7)
|
2.0 (35.6)
|
7.8 (46.0)
|
13.0 (55.4)
|
16.4 (61.5)
|
20.2 (68.4)
|
21.0 (69.8)
|
17.3 (63.1)
|
11.8 (53.2)
|
6.4 (43.5)
|
1.1 (34.0)
|
9.5 (49.1)
|
Mean daily minimum °C (°F)
|
−5.3 (22.5)
|
−5.3 (22.5)
|
−2.4 (27.7)
|
2.6 (36.7)
|
7.7 (45.9)
|
12.3 (54.1)
|
16.7 (62.1)
|
17.5 (63.5)
|
13.8 (56.8)
|
7.7 (45.9)
|
2.0 (35.6)
|
−2.6 (27.3)
|
5.4 (41.7)
|
Record low °C (°F)
|
−11.7 (10.9)
|
−12.1 (10.2)
|
−10.4 (13.3)
|
−6.0 (21.2)
|
−2.3 (27.9)
|
3.6 (38.5)
|
8.7 (47.7)
|
8.9 (48.0)
|
3.2 (37.8)
|
−1.2 (29.8)
|
−6.1 (21.0)
|
−10.2 (13.6)
|
−12.1 (10.2)
|
Average precipitation mm (inches)
|
52.6 (2.07)
|
42.8 (1.69)
|
101.6 (4.00)
|
139.6 (5.50)
|
180.8 (7.12)
|
220.5 (8.68)
|
305.7 (12.04)
|
303.9 (11.96)
|
305.3 (12.02)
|
212.6 (8.37)
|
89.2 (3.51)
|
60.1 (2.37)
|
2,014.7 (79.33)
|
Average snowfall cm (inches)
|
103 (41)
|
79 (31)
|
45 (18)
|
7 (2.8)
|
0 (0)
|
0 (0)
|
0 (0)
|
0 (0)
|
0 (0)
|
0 (0)
|
4 (1.6)
|
55 (22)
|
293 (116.4)
|
Average precipitation days (≥ 1.0 mm)
|
9.1
|
8.3
|
10.4
|
11.3
|
12.1
|
15.9
|
18.3
|
17.0
|
14.8
|
11.5
|
8.3
|
9.1
|
146.1
|
Average snowy days (≥ 1 cm)
|
11.5
|
8.8
|
5.5
|
0.6
|
0
|
0
|
0
|
0
|
0
|
0
|
0.4
|
5.9
|
32.7
|
Mean monthly sunshine hours
|
131.0
|
129.0
|
156.4
|
170.4
|
169.1
|
108.8
|
98.7
|
115.3
|
98.9
|
115.1
|
130.1
|
132.6
|
1,555.2
|
Source 1: JMA[3]
|
Source 2: JMA[4]
|
Eruption
It is estimated that Mount Nasu started erupting 600 thousand years ago. The eruption started from the north end of the mountain range, at Kashi-Asahi Peak. Only Chausu Peak is active today.
Access
Gallery
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Chausu lava dome and Asahi Peak
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Chausu lava dome and fumes
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Asahi Peak
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West view from Sanbonyari Peak
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Sanbonyari Peak and snow in summer
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At the Sanbonyari Peak
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Topographic map
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To Asahi Peak
References
External links
Wikimedia Commons has media related to
Mount Nasu.