Mount Nasu
{{More citations needed|date=February 2022}}
{{Short description|Group of complex volcanoes on the island of Honshu}}
{{Infobox mountain
| name = Mount Nasu
| other_name = 那須岳
| photo = 20090321MtNasuTagged.jpg
| photo_size =
| photo_alt =
| photo_caption = Nasu Mountains
| highest = Sanbonyari Peak
| elevation_m = 1916.9
| elevation_ref = {{cite opentopomap|Mount Nasu|37.15|139.96144|2023-06-12}}
| prominence_m = 1009
| prominence_ref = https://worldribus.org/japanese-archipelago/
| range = Ōu Mountains
| parent_peak =
| listing = Mountains of Japan, Ribu
| language = Japanese
| pronunciation =
| location = On the border of Nasushiohara and Nasu of Tochigi Prefecture, Nishigō, Nishishirakawa of Fukushima Prefecture, Japan
| map = Japan
| map_alt =
| map_caption =
| map_size =
| label = Mount Nasu
| label_position = right
| coordinates = {{coord|37|09|N|139|57|E|type:mountain_scale:100000|format=dms|display=inline,title}}
| coordinates_ref =
| topo =
| type = Complex volcano
| volcanic_arc/belt=
| age =
| last_eruption = November 1963{{cite gvp|name=Nasudake|vn=283150|access-date=2021-06-24}}
| first_ascent =
| easiest_route =
|fetchwikidata=ALL
}}
{{nihongo|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 {{Convert|1916.9|m|ft|0|abbr=on}}. 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 {{nihongo|Nasu Five Peaks|那須5岳|Nasu-Go-Take}}.
Climate
{{Weather box
|collapsed = Y
|single line = Y
|metric first = Y
|location = Mount Nasu (1991−2020 normals, extremes 1976−present)
|Jan record high C = 12.7
|Feb record high C = 16.8
|Mar record high C = 21.1
|Apr record high C = 26.8
|May record high C = 29.6
|Jun record high C = 30.3
|Jul record high C = 31.8
|Aug record high C = 32.2
|Sep record high C = 29.5
|Oct record high C = 24.6
|Nov record high C = 20.0
|Dec record high C = 17.4
|year record high C = 32.2
|Jan high C = 1.9
|Feb high C = 2.7
|Mar high C = 6.8
|Apr high C = 13.0
|May high C = 18.2
|Jun high C = 20.7
|Jul high C = 24.3
|Aug high C = 25.4
|Sep high C = 21.4
|Oct high C = 16.1
|Nov high C = 10.9
|Dec high C = 5.1
|Jan mean C = −1.7
|Feb mean C = −1.3
|Mar mean C = 2.0
|Apr mean C = 7.8
|May mean C = 13.0
|Jun mean C = 16.4
|Jul mean C = 20.2
|Aug mean C = 21.0
|Sep mean C = 17.3
|Oct mean C = 11.8
|Nov mean C = 6.4
|Dec mean C = 1.1
|Jan low C = -5.3
|Feb low C = -5.3
|Mar low C = -2.4
|Apr low C = 2.6
|May low C = 7.7
|Jun low C = 12.3
|Jul low C = 16.7
|Aug low C = 17.5
|Sep low C = 13.8
|Oct low C = 7.7
|Nov low C = 2.0
|Dec low C = -2.6
|Jan record low C = -11.7
|Feb record low C = -12.1
|Mar record low C = -10.4
|Apr record low C = -6.0
|May record low C = -2.3
|Jun record low C = 3.6
|Jul record low C = 8.7
|Aug record low C = 8.9
|Sep record low C = 3.2
|Oct record low C = -1.2
|Nov record low C = -6.1
|Dec record low C = -10.2
|precipitation colour = green
|Jan precipitation mm = 52.6
|Feb precipitation mm = 42.8
|Mar precipitation mm = 101.6
|Apr precipitation mm = 139.6
|May precipitation mm = 180.8
|Jun precipitation mm = 220.5
|Jul precipitation mm = 305.7
|Aug precipitation mm = 303.9
|Sep precipitation mm = 305.3
|Oct precipitation mm = 212.6
|Nov precipitation mm = 89.2
|Dec precipitation mm = 60.1
|snow colour = green
|Jan snow cm = 103
|Feb snow cm = 79
|Mar snow cm = 45
|Apr snow cm = 7
|May snow cm = 0
|Jun snow cm = 0
|Jul snow cm = 0
|Aug snow cm = 0
|Sep snow cm = 0
|Oct snow cm = 0
|Nov snow cm = 4
|Dec snow cm = 55
|unit precipitation days = 1.0 mm
|Jan precipitation days = 9.1
|Feb precipitation days = 8.3
|Mar precipitation days = 10.4
|Apr precipitation days = 11.3
|May precipitation days = 12.1
|Jun precipitation days = 15.9
|Jul precipitation days = 18.3
|Aug precipitation days = 17.0
|Sep precipitation days = 14.8
|Oct precipitation days = 11.5
|Nov precipitation days = 8.3
|Dec precipitation days = 9.1
|unit snow days = 1 cm
|Jan snow days = 11.5
|Feb snow days = 8.8
|Mar snow days = 5.5
|Apr snow days = 0.6
|May snow days = 0
|Jun snow days = 0
|Jul snow days = 0
|Aug snow days = 0
|Sep snow days = 0
|Oct snow days = 0
|Nov snow days = 0.4
|Dec snow days = 5.9
|Jan sun = 131.0
|Feb sun = 129.0
|Mar sun = 156.4
|Apr sun = 170.4
|May sun = 169.1
|Jun sun = 108.8
|Jul sun = 98.7
|Aug sun = 115.3
|Sep sun = 98.9
|Oct sun = 115.1
|Nov sun = 130.1
|Dec sun = 132.6
|year sun = 1555.2
|source 1 = JMA{{cite web
| url = https://www.data.jma.go.jp/obd/stats/etrn/view/rank_a.php?prec_no=41&block_no=0326&year=&month=&day=&view=h0
|script-title=ja:観測史上1～10位の値（年間を通じての値）
| publisher = JMA
| access-date = February 18, 2022}}
|source 2 = JMA{{cite web
| url = https://www.data.jma.go.jp/obd/stats/etrn/view/nml_amd_ym.php?prec_no=41&block_no=0326&year=&month=&day=&view=h0
|script-title=ja:気象庁 / 平年値（年・月ごとの値）
| publisher = JMA
| access-date = February 18, 2022}}}}
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
- Nasu Sancho Station of Nasu Ropeway
- Sandogoya Onsen Bus Stop of Kanto Transportation
Gallery
File:Mt.Chausu&Mt.Asahi.jpg|Chausu lava dome and Asahi Peak
File:Nasu chausudake.jpg|Chausu lava dome and fumes
File:Nasu asahidake.jpg|Asahi Peak
File:Nasudake02.JPG|West view from Sanbonyari Peak
File:Nasudake03.JPG|Sanbonyari Peak and snow in summer
File:Nasudake08.JPG|At the Sanbonyari Peak
File:Nasu Volcano Group Relief Map, SRTM-1.jpg|Topographic map
File:Nasudake01.JPG|To Asahi Peak
References
{{reflist}}
External links
{{commonscat|Mount Nasu}}
- [http://www.data.jma.go.jp/svd/vois/data/tokyo/301_Nasudake/301_index.html Nasudake] – Japan Meteorological Agency {{in lang|ja}}
- {{cite web|url= http://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/souran_eng/volcanoes/039_nasudake.pdf |title=Nasudake: National catalogue of the active volcanoes in Japan }} – Japan Meteorological Agency
- [https://gbank.gsj.jp/volcano/Act_Vol/nasu/index-e.html Nasudake] – Geological Survey of Japan
{{100 Famous Japanese Mountains}}
{{DEFAULTSORT:Nasudake}}
Category:Mountains of Tochigi Prefecture
Category:Mountains of Fukushima Prefecture
Category:Volcanoes of Tochigi Prefecture