I love driving along this route. There's a small fee but absoutely worth it for the view.
It's also a popular cycling route although pretty tough with all the elevation change and quite the distance.

Cycling Rental: https://www.merida.jp/x-base/en/

About:

The Izu Skyline is a scenic drive in Shizuoka Prefecture, Japan, known for its breathtaking views of Mount Fuji and the surrounding landscape. It's like a picture-perfect road trip with stunning vistas at every turn, making it a must-visit spot for nature lovers and adventure seekers. So, if you're up for some epic views and a memorable drive, the Izu Skyline is definitely worth checking out!