When seeking to explore an epistolary book quality, this book has the great merit of proposing a real correspondence between a young child and his mother in Japan during World War II (until 1948). Very touching letters reveal to us the feelings and concerns of a boy who wrote to his mother from the age of 14 until the age of 18. The structure of the work is quite interesante because it contains exchanges of letters by mail when the child decides to stay separated from his family to continue to study, of written exchanges in a notebook and a diary when her mother n does not have the time to reply. The first part reveals the feelings of the young child; In the second part, the adolescent and young adult analyzing the defeat of Japan, his relationship with his parents and the consequences of the bombs on Hiroshima and Nagasaki. This opens a window both on the literary expression of feelings and on contemporary history (World War II). The book is not hard to read and is well suited to teenagers the same age as the hero.