Mount Karasuba (烏場山, Karasuba-yama) is a mountain of modest height on the border of the cities Minamibōsō and Kamogawa in Chiba Prefecture, Japan, reaching an elevation of 266.6 m (875 ft).

The kanji for Mount Karasuba, 烏 and 場, mean 'crow' and 'place' respectively.

It is home to many examples of the Japanese stone oak and the sudajii castanopsis, an evergreen beech tree.

The area around the Odawara district of Minamibōsō is a base for floriculture, and there are many flower fields at the base of Mount Karasuba, even in winter.

[1] The hiking trail that leads to Mount Karasuba is accessible from Wadaura Station in Minamibōsō via the JR East Uchibō Line, although the hike to the summit can take several hours.