The Japanese Archipelago Explodes!!

The great geologist Dr. Tomishima discovers that Japan's volcanoes are interconnected, and he pinpoints the core. Creating a blast there would cause all of Japan's volcanoes to explode at once. Bone Bambara steals Dr. Tomishima's map of the core of the volcanoes, and sets off an explosion there, but nothing happens. The doctor had prepared a fake map.