Fuji Q Highland/富士急ハイランド is an amusement park located in Fujiyoshida in Yamanashi.
This themepark boasts the highest, fastest and scariest roller-coasters in Japan.
It also is at the base of Mount Fuji, which makes it pretty awesome.
It has an hour long haunted house.
One hour. Of being terrified. T_T
They also have a Thomas the Tank Engine land for the more faint hearted.
There’s also a hotel and hotspring resort nearby with a view of Mount Fuji.
Check out their official English website here.