Who is Toshiko Sasaki from Hiroshima and what is their importance?

Sasaki was a clerk in the personnel department of the East Asia Tin Works. Sasaki is not related to Terufumi Sasaki. She was at work when the atomic detonation took place and was immediately buried by an avalanche of books and debris. She remained buried for many hours with a compound fracture of her leg. After being rescued from the debris she was given up as medically hopeless and was abandoned with two other individuals. However, she survived. Over the next months, she was transferred frequently among medical facilities until her leg eventually healed without being set.