Mount Yoko (Southern Yatsugatake)
{{Short description|Mountain in Honshū, Japan}}
{{Infobox mountain
| name = Mount Yoko
| other_name = 横岳
| photo = Akadake4.JPG
| photo_caption = Mount Iō and Mount Yoko, from Mount Aka. (August 2007)
| elevation_m = 2829
| elevation_ref =
| prominence_m = 140
| prominence_ref =
| parent_peak = Mount Aka
| listing = List of mountains and hills of Japan by height
| language = Japanese
| range = Southern Yatsugatake Volcanic Group
| map = Japan
| coordinates = {{coord|35|58|59|N|138|22|27|E|region:JP_type:mountain|display=inline,title}}
| coordinates_ref=
| topo = Geographical Survey Institute 25000:1 八ヶ岳西部,
25000:1 八ヶ岳東部,
50000:1 八ヶ岳
| type = Volcanic
| age = Quaternary
| volcanic_arc = Northeastern Japan Arc
| last_eruption =
| first_ascent =
| easiest_route =
}}
{{nihongo|Mount Yoko|横岳|Yoko-dake}} is located in the Southern Yatsugatake Volcanic Group of the Yatsugatake Mountains, Honshū, Japan.
File:Iodake2.JPG, and Mount Amida from Mount Iō. (August 2008)]]
