- Celebrity Voice Actor: In the Japanese version, Hana is voiced by film and drama actress Aoi Miyazaki, the Wolfman is voiced by actor and model Takao Osawa, the adolescent Yuki is voiced by stage and film actress Haru Kuroki and the adolescent Ame is voiced by drama actor Yukito Nishii.
- Dawson Casting: Played straight in the English Dub of the film. 0-8 year old Yuki was played by 23 year old Lara Woodhull, while 0-7 Ame was played by 31 year old Alison Viktorin.
- In Memoriam: The English dub of the film features a dedication to Nirasaki's voice actor Jerry Russell, who died in September 2013.
- Morphic Resonance: Ame and Yuki's wolf forms have tan fur but keep their human hairstyles. Ame's fur turns completely bluish-grey once he becomes an adult. According to the film's artbook, this was done intentionally to show that the children would always retain some form of humanity even when they otherwise look completely wolfish.
- Posthumous Credit: Despite dying of surgery complications over two weeks before the film's premiere in the United States, Jerry Russell is still given a credit in the film's English dub, having recorded all of his lines months in advance.
- Real-Place Background: While it's never explictly stated where Hana and her kids move to in the country, their new home bears many similarities to the town of Kamiichi in the Toyama prefecture. It's a small rural community tucked within lush wilderness and snowcapped mountains just like in the film. The family house is basically a carbon copy of an actual farmhouse that has been in the area since the 1800s. Kamiichi also happens to be Mamoru Hosoda's hometown.
- Studio Hop: Beginning with this film, all of Mamoru Hosoda's films have been produced by Studio Chizu and distributed by Toho.
Trivia / Wolf Children