Amongst all the great views I enjoyed (and photographed) so far, the most beautiful and impressive was the Mount Fuji as seen from the Tōkaidō Shinkansen line. If you take the Shinkansen from Tokyo to Osaka, before arriving at Shizuoka, look to the right side... It is often hidden by fog and clouds, but you may be in luck...
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