Secret OSS project to destroy Mount Fujiyama

Hi! All
Sorry, this is the 2nd search try in this forum. Hope not to bother anyone. Most well known alternatives to Downfall Operation were Hiroshima & Nagasaki thouhg l-e-s-s known were this one:
www.vialls.com...
and another one on which I can-not-find-absolutely-nothing on the net and consisted to launch a huge atom bomb on Mount Fuji. Apparently this massive artifact was lost along with the vessel while sailing by a japanese torpedoe.
Anyone of you know any link on this subject.
Thx a lot in advance

I live in Japan, not too far from Tokyo/-Mt. Fuji. I am in the U.S. Air Force as well so maybe I can find out some good information.

Eric