Nakajima G10N
The Nakajima G10N Fugaku (Japanese: 富岳 or 富嶽, "Mount Fuji"), was a planned Japanese ultra-long-range heavy bomber designed during World War II. It was conceived as a method for mounting aerial attacks from Japan against industrial targets along America's West Coast. Japan's worsening war situation resulted in the project's cancelation in 1944 and no prototype was ever built.
Read more about Nakajima G10N: Design and Development, Operators (planned), Specifications (Project Z / Fugaku Projected)