Why is Mieko sent to live with her grandparents?

Mieko is sent to live with her grandparents due to family circumstances, such as her parents' inability to care for her, perhaps due to work commitments or personal issues. This move is often motivated by the hope that her grandparents can provide a stable and nurturing environment for her. Additionally, living with her grandparents allows Mieko to connect with her cultural roots and family history.