It doesn't appear suddenly, the top of the cone will first rise over the hills as in today's photo, a view that I enjoyed a lot. Then, while the train speeds towards Shizuoka, you will get to see Mount Fuji in all its splendor.
EXIF info:
Nikon D700
Lens: 24-70mm F/2.8G
Focal Length: 70mm
Aperture: F/7.1
Shutter Speed: 1/1250s
ISO Sensitivity: ISO 320