Actually, it seems that part of it survives at the Meiji-Mura Museum near Nagoya (see the above link for details). Surviving bits are mostly in the form of exterior stone decorations, lobby furnishings and such because the brick and concrete construction of the original could not be disassembled.
It happened that I was in Japan a few times while serving in the U.S. Army and took some slide photos of the hotel that I recently scanned and digitally adjusted. The images aren't very good, but at least they offer a sense of what the Imperial Hotel was like a few years before it was demolished. Had I known its future, I probably would have taken many more photos to document the building.
Stars and Stripes newspaper.. The weather was gloomy the day I took these photos. Worse, the film I used was Kodak's Ektachrome, a cheaper alternative to its now-discontinued Kodachrome color film. Seen here is the entrance and reflecting pond. Among the cars shown are a Chevrolet and a Cadillac, Japan having little in the way of domestically built large automobiles in those days.