Last Letter (ラストレター, Rasuto Retā) is a 2020 Japanese romantic drama film written, directed and edited by Shunji Iwai, based on his own novel.
[1][2] The film stars Takako Matsu, Suzu Hirose, Nana Mori, Ryunosuke Kamiki, Hideaki Anno and Masaharu Fukuyama.
While there, Kyoshiro Otosaka speaks to her, and gets her number, telling her that he was in love with her (assuming that she is her sister).
They start exchanging letters, and it is revealed that he had a relationship with her, before it broke off and she went out with an abusive man, who fathered her daughter Ayumi.
He ends up meeting Yuri again, and then finally her daughters who take him to pay respects to Misaki, where Ayumi reveals the letters, and the chapters he would send were a source of support for Misaki during their bad times.