KONTORA
Guided by her grandfather's WWII-era diary, Sora searches for a mysterious trove in the wilderness of her hometown. Meanwhile, a mysterious mute and backward-walking homeless man wanders into town who may be the catalyst to put her shattered relationship with her father back together.
Starring Wan Marui, Hidemasa Mase, Taichi Yamada, Seira Kojima, Takuzo Shimizu, Ai Sakauchi
Watch "KONTORA" on Amazon Prime released in 2021. It's a drama and family movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.