The House Where the Mermaid Sleeps is a Japanese drama film directed by Yukihiko Tsutsumi. Kaoruko and Kazumasa Harima are a separated couple who both struggle with guilt and regret over their past mistakes in their relationship and parenting. The news of their daughter's accident brings them back together and they must face the difficult decision of what to do with their daughter's organs.
As they wait for their daughter's heart to stop beating, the couple reminisces about their past and realizes how much they've taken their family for granted. The film tackles themes of grief, love, and forgiveness as the couple tries to come to terms with their daughter's death and the aftermath of their divorce.
The film also explores the perspectives of other characters, such as the doctors and recipients of the donated organs. The House Where the Mermaid Sleeps offers a poignant reminder of the fragility of life and the importance of cherishing every moment with loved ones.