when tanabe turned 60, he changed his mind. he felt a need to pass down to future generations what ground zero used to look like. tanabe used computer graphics to recreate the streets and houses before the explosion. his documentary films have been screened abroad. he realized that many people didn't know the consequences of the bombing. >> translator: in reality, a large number of civilians were sacrificed and subjected to suffering, but many people don't realize this. >> reporter: tanabe thought hard to make sure the facts were understood. he interviewed former residents to learn more about what they had experienced. creating the new film took five years. it was ready for viewing in new york. tanabe depicted the daily lives of people in hiroshima before the tragedy. in addition to the computer graphics, he included videos, drawings and photos he collected. in the morning of august 6th, 1945, the bomb was dropped. drawings by survivors portrayed the agony. >> they were drawn by the survivors themselves. >> reporter: including