Mount Suribachi is a 169-metre -high hill on the southwest end of Iwo Jima in the northwest Pacific Ocean under the administration of Ogasawara Subprefecture, Tokyo Metropolis, Japan. The hill's name derives from its shape, resembling a suribachi or grinding bowl. It is also known as "Mount Pipe", since the volcanic gas and water vapor that rolls in from the su…Mount Suribachi is a 169-metre -high hill on the southwest end of Iwo Jima in the northwest Pacific Ocean under the administration of Ogasawara Subprefecture, Tokyo Metropolis, Japan. The hill's name derives from its shape, resembling a suribachi or grinding bowl. It is also known as "Mount Pipe", since the volcanic gas and water vapor that rolls in from the summit, alongside the rest of the island, give the appearance of a smoking pipe when viewed from the sea.