Mount Sukai is an old stratovolcano, but with the whole mountain covered in forest today it does not appear like a typical volcano.

In addition Mount Sukai can be reached from Fudosawa (不動沢, Fudōsawa) in Gunma Prefecture.

Religiously motivated mountain climbing in form of a three-mountain-race along Mounts Koshin, Nokogiri and Sukai was practised in the Edo period.

There are ladders along the ascent to Mount Koshin and the ups and downs on Nokogiri's ridges.

Making use of private transport the summit can be climbed in relatively short time along the Fudosawa route on the Gunma side.