Cast and Crew of Summer Wars

Summer Wars

サマーウォーズ

"Summer Wars" follows teenage math prodigy Kenji Koiso, who agrees to a summer job at the Nagano hometown of his crush, Natsuki Shinohara. Upon arrival, he discovers that Natsuki's family has gathered to celebrate the 90th birthday of their matriarch. Kenji's task is to pretend to be Natsuki's fiancé. During his stay, his attempt to solve a complex mathematical equation inadvertently triggers a collision between a virtual parallel world and reality, leading to a high-stakes battle to save both worlds.

Trivia & Behind-the-Scenes:
1. "Summer Wars" was directed by Mamoru Hosoda, known for blending heartfelt family stories with sci-fi elements, marking his second feature film after "The Girl Who Leapt Through Time."
2. Ryunosuke Kamiki, who voices Kenji, was only 17 years old during recording, bringing authentic youthful energy to the character.
3. The film’s rich depiction of the virtual world "OZ" was inspired by early visions of the internet and social media, painstakingly crafted to reflect a believable and immersive digital society.

Main Cast of Summer Wars

Ryunosuke Kamiki as Kenji Koiso (voice)

Ryunosuke Kamiki

Kenji Koiso (voice)
Ryunosuke Kamiki lent his voice to the character Kenji Koiso in the acclaimed animated film 'Summer Wars.' His performance was widely praised for its natural and heartfelt delivery, capturing the innocence and intelligence of Kenji with remarkable authenticity. What made Kamiki's role unique was his ability to bring depth to a young protagonist navigating both the digital and real worlds, creating a relatable and engaging lead that resonated with audiences of all ages. A lesser-known fact about Kamiki's involvement is that he closely collaborated with director Mamoru Hosoda to understand Kenji's personality, even visiting technological settings for inspiration, which added a layer of realism to his portrayal.
Hitomi Miyauchi as Natsuki Shinohara (voice)

Hitomi Miyauchi

Natsuki Shinohara (voice)
Fans of Hitomi Miyauchi will appreciate her role in 'Summer Wars' as it showcases her versatility and ability to bring warmth and depth to her characters, much like in her iconic performance where she portrayed empathetic and strong-willed individuals. In 'Summer Wars', her character offers a compelling blend of emotional nuance and resilience, aligning with what fans have come to admire in her work. An interesting detail is that Miyauchi was cast partly due to her natural voice tone, which the director felt perfectly embodied the harmony between traditional family values and modern digital challenges explored in the film.
Mitsuki Tanimura as Kazuma Ikezawa (voice)

Mitsuki Tanimura

Kazuma Ikezawa (voice)
In the animated film 'Summer Wars' (2009), Mitsuki Tanimura provided the voice for the character Natsuki Shinohara. This role allowed her to showcase her vocal talents in a high-profile anime project, marking a distinct point in her career primarily known for live-action performances. Unlike her earlier work, which involved on-screen roles in dramas and films, her performance in 'Summer Wars' stood out as it required conveying emotion and personality solely through voice acting. This diversification highlighted her versatility as an actress and expanded her presence in the Japanese entertainment industry.

Crew of Summer Wars

Full backstage crew list →