[2] She lived in Hiroshima during World War II and died during the atomic bombing of the city by the United States.
Her brother, Koji Hosokawa, who survived the attack on Hiroshima, made her diary available for publication.
[2] Moriwaki started keeping her diary as an assignment at her school, the Hiroshima Prefectural Girls' HS #1.
In addition to chronicling her daily life, it kept a record of wartime Japan, covering topics from what classes she was taking to sightings of war planes flying overhead.
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