Why does Otsuka choose to reveal the family's reason for moving-and the father's arrest-so indirectly and so gradually? What is the effect when the reason becomes apparent?

Through the revelation of the family in moving gradually, the author can show the negative effects on dividing families. In addition, the author can also symbolize injustice against the Japanese Americans by revealing his father's slow and indirect arrest, showing that it did not happen overnight. In this way, it is possible to show the dark and sad environment of the story.