The world is what we see. It has an objective existence (probably), but it is filtered through our eyes, our ears, our memories. Our love.
“Kira-Kira” is about that fluidness of perception. Things have their objective existence, and the characters apply their own meanings. The sound of grasshoppers. A sun setting on the day of a death. A bear trap. A cheap watch. A Japanese man.
It may be a little, deceptively simple book. But it’s not about the objective reality. It’s all about what you see.