. >> reporter: sakue shimohira has been doing this for more than half her life, meeting young people and telling her stories. the 74-year-old was was 10 when a war plane dropped an atomic bomb on her home in nagasaki. she lost a mother, a brother, and two sisters. >> translator: i still remember people with burned skin and people whose organs had come out of their bodies. i still hear people screaming. they'd rather be killed. >> reporter: shimohira has been campaigning for the global abolition of nuclear weapons at home and abroad. she he's traveled to more than 20 countries, including the u.s., france, and russia. >> no more war! >> no more war! >> reporter: shimohira has dealt with the after-effects of radiation for decades, and now she visits the hospital a few times a week. doctors believe she'll lose her sight within five years. >> translator: i don't know what i'd do if i couldn't see. i'm worried. i don't have much time left. >> reporter: but she's found someone to follow in her footsteps. yuna aihara is a university student from a city near tokyo. three years ago, she heard