Nemaze no Toko is a desginated spot of natural beauty and part of the Central Alps Quasi-National Park. It is located randomly on the side of the road. It is a gorge with perfectly eroded rocks. it is worthwhile checking out if driving past but not going out of your way for.
Located in the beautiful onsen town of Noboribetsu is the jigokudani, not to be confused with the more famous jigokudani in Nagano which has bathing monkeys. Jigokudani is an amazing volcanic spring that has views you don't really see anywhere else.
Mt. Nagiso is a small mountain located in the Central Alps. It lacks the alpine feel of some of the other hikes in the area such as Utsugi-dake and Kiso Koma ga Take, but nonetheless is a pretty decent hike. It sees very little foot traffic and has good views over Mt. Ena and onto Mt. Ontake. Some nice easy rock scrambling and some precarious bridges.
Despite being labelled as ruins of a fort, there is literally nothing remaining. It is just a hill with a minor view of the town of Akechi. Don't expect too much. The hike is also a bit confusing.
Osaka no Taki is an area created that was created by the eruption of nearby Mount Ontake. It is home to unique volcanic rock and over 200 different waterfalls.
A loop that takes you past seven different waterfalls and a lake. The first two waterfalls are particularly impressive.
Ryugu Sea Cave is one of the most famous spots in Izu and part of the Fuji-Hakone-Izu National Park. It isn't anything particularly spectacular, but if you are in the area, you may as well visit.
An easy hike with some of the most amazing waterfalls you will see.
An underated hike out in the middle of nowhere in Nagano prefecture. Mind-blowing waterfalls and epic adventure over suspension bridges.
Mount Takao (高尾山, Takaosan) is one of the closest natural recreation areas to central Tokyo, offering beautiful scenery, an interesting temple and attractive hiking opportunities. Although outside the city center, the mountain is still located within metropolitan Tokyo and takes only 50 minutes and 390 yen to reach from Shinjuku.