Trivia / Summer Wars

• Adaptation First: The manga adaptation came out before the movie.
• Celebrity Voice Actor: Most of the main characters are voiced by celebrities in the original Japanese version. For example, Kenji Koiso is voiced by Ryunosuke Kamiki, Natsuki Shinohara is voiced by actress and model Nanami Sakuraba, Kazuma Ikezawa is voiced by Mitsuki Tanimura and Sakae Jinnouchi is voiced by yakuza film star Sumiko Fuji.
• Children Voicing Children: In the Japanese version, Yuhei, Shingo, Mao and Kana were played by real-life child actors Rikito Ota, Yuki Imai, Sumire Morohoshi and Hinano Minagawa, respectively.
• Crossdressing Voices: Mitsuki Tanimura and Maxey Whitehead as Kazuma Ikezawa.
• Directed by Cast Member:
  • The English dub was directed by Mike McFarland, who voiced Shota Jinnouchi.
  • The Mexican Spanish dub was likewise directed by Yumi Jinnouchi's voice actress, Karla Vega.
• Recycled Script: Viewers who previously watched the Digimon Adventure film Our War Game will probably note the similarities between the films. The reason: both were directed by Mamoru Hosoda.
• Spiritual Successor: Of Our War Game.
• Studio Hop: Mamoru Hosoda's previous film, The Girl Who Leapt Through Time, was distributed by Kadokawa Herald Pictures. For this film, Warner Bros. handled distribution.
• What Could Have Been: News revealed that Summer Wars was rejected by Warner Bros.... in which case, an entirely new dub would've had to be made! Who knows how much the chances of an Oscar nomination would've changed if that had happened!
• Write What You Know: According to Mamoru Hosoda, the premise of this movie is based on a personal experience from the director himself, when he met his girlfriend (and later wife)’s family for the first time. The feeling of mystery and curiosity towards a group of people that not long ago were complete strangers to him, gave him the inspiration for the plot.

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