この絵本は，平成１７年度の長崎市立桜馬場中学校の３年生が平和学習の一環として，長崎工業学校造船科の２年生のときに被爆された，吉田勝二先生の被爆体験講話を聴いて，文化祭で紙芝居として発表しました。そして，平成１８年度の３年生が，さらに詳しく話しを聞き直しながら文章と絵を作成する班に分かれて，平成１９年３月に絵本として完成しました。（長崎市被爆継承課HPより）

The story of this picture book began in 2005, when the third-year students of Sakurababa Junior High School were given an opportunity to hear Mr.Katsuji Yoshida speak about his atomic bombing experiences as part of thier peace education program. After listening to Mr.Katsuji Yoshida who was a second-year shipbuilding student at Nagasaki Prefecture Technical School at the time of the bombing, the students developed a picture-card version of his story for a presentation at their school culture festival. The project was then passed on to the third-year students of 2006, who listened anew to Mr. Yoshida's talks and divided themselves into two groups to work on the script and artwork for a picture book, which was completed in March, 2007.