Mount Nokogiriyama is a hidden treasure which I am very surprised to hear that hardly anyone knows about. A few years ago a huge road that travels just less than 10 km under the sea and just under 5 km over it, made it much easier and faster to get across Tokyo bay. (you can also get there by ferry and cable car if you don’t drive) This means that in just 1.5 hours you can get from Tokyo to Mount Nokogiriyama. And to be honest even the tunnel and bridge to get across the bay is worth the trip! I hadn’t expected there to be as much to see as there was in the area and we could have spent a lot more time there than we did. You do have to love walking though and have no problem with stairs because there are a lot of stairs (so no prams). It’s well worth it though and I would return more than once myself.