Tomoyo Harada, who narrates the film, had starred as Kazuko Yoshiyama in The Girl Who Leapt Through Time (1983).
Each adaptation of "The Girl Who Leapt Through Time" is usually tailored to the era it is being made. However, this adaptation is set in 1965, the year the original novel was released.
The song "Toki no Canzone" is a remake of the The Girl Who Leapt Through Time (1983) theme song "Toki o Kakeru Shojo".