The Premonition by Banana Yoshimoto

I had a premonition of setting out on a journey and getting lost inside a distant tide . . .

It was the beginning of summer, and I was nineteen years old. Yayoi lives with her perfect, loving family - something 'like you'd see in a Spielberg movie'. But while her parents tell happy stories of her childhood, she is increasingly haunted by the sense that she's forgotten something important about her past.