One of the quintessential images of Japan, Fuji is a mountain and hike well worth the acclaim bestowed upon it. Standing tall at 3,776 meters, this active volcano offers views unlike any other in Japan and a hike that's challenging enough to push your limits, but not so difficult as to keep away amateur hikers. Along with Mount Tate and Mount Haku, Fuji is considered one of the three Holy Mountains of Japan, and should be treated accordingly. This hike isn't too difficult, but damn well deserves respect and is underestimated at the hiker's peril.