is a 2009 Japanese animated science fiction film directed by Mamoru Hosoda, produced by Madhouse, and distributed by Warner Bros. Pictures. The film's voice cast includes Ryunosuke Kamiki, Nanami Sakuraba, Mitsuki Tanimura, Sumiko Fuji, and Ayumu Saitō. Set in 2010, Summer Wars tells the story of Kenji Koiso, a timid eleventh-grade math genius who is taken to Ueda by twelfth-grade student Natsuki Shinohara to celebrate her great-grandmother's 90th birthday. However, he is falsely implicated in the hacking of a virtual world by a self-aware, sadistic Artificial Intelligence named Love Machine. Kenji must repair the damage done, and find a way to stop the rogue computer program from causing any further chaos.
After producing The Girl Who Leapt Through Time, Madhouse was asked to produce something new. Hosoda and writer Satoko Okudera created a story about a social network and a stranger's connection with strange family. The real-life city of Ueda was chosen as the setting for Summer Wars as part of the territory was once governed by the Sanada clan and was close to Hosoda's birthplace in Toyama. Hosoda used the clan as the basis for the Jinnouchi family after visiting his then-fiancée's home in Ueda.
Production of Summer Wars commenced in 2006. Art director Youji Takeshige incorporated Japanese houses into his background designs. Hosoda also insisted that 80 family members were to be included as main characters. The project was first announced at the 2008 Tokyo International Anime Fair and the first trailer of the film was released in April 2009. Audience interest was fueled primarily through word of mouth and Internet publicity. A manga adaptation of the film was written by Iqura Sugimoto and began its serialization in July 2009.
Summer Wars premiered in Japan on August 1, 2009. It grossed over US$1 million in its opening weekend in 127 theaters and ranked No. 7 at the box office. The film was well received by critics and the general audience and was financially successful, earning $18 million worldwide. It won several awards such as the 2010 Japan Academy Prize for Animation of the Year, the 2010 Japan Media Arts Festival's Animation Division Grand Prize, the Anaheim International Film Festival's Audience Award for Best Animated Feature and was nominated for the 2009 Golden Leopard award at the Locarno International Film Festival.
Plot
In 2010, Kenji Koiso is a young student at Kuonji High School with a gift for mathematics and a part-time moderator in the massive computer-simulated virtual reality world OZ along with his friend Takashi Sakuma.
One day, Kenji is invited by fellow Kuonji student Natsuki Shinohara to participate in her great-grandmother Sakae Jinnouchi's 90th birthday. After traveling to Sakae's estate in Ueda, Nagano, Natsuki introduces Kenji as her fiancé to Sakae, surprising them both. Kenji meets several of Natsuki's relatives and discovers that the Jinnouchis are descendants of a samurai (vassal of the Takeda clan) who challenged the Tokugawa clan in 1615. He also meets Wabisuke Jinnouchi, Natsuki's half-great-uncle and a software engineer who has been living in the United States since stealing the family fortune 10 years ago.
Kenji receives an e-mail with a mathematical code and cracks it. However, a program called Love Machine uses Kenji's solution to hijack his avatar and hack into OZ's system. Kenji, Sakuma, and Natsuki's cousin Kazuma Ikezawa confront Love Machine, but it defeats Kazuma's avatar King Kazma and continues absorbing the system's accounts, causing catastrophic traffic congestion and disabling electrical devices. Two of Sakae's relatives, Rika and Shota Jinnouchi, deduce Kenji's involvement. Shota arrests Kenji, but the congestion causes Natsuki to return them to the estate.
Sakae calls associates in important positions in Japanese society and relatives who work in emergency services, encouraging them to work their hardest to reduce chaos and damage, comparing the situation to war. Kenji returns control of the system to the moderators and engineers while Sakuma discovers that Kenji actually misspelled one part of the code. Wabisuke reveals that he developed the program and sold it to the United States Armed Forces for a test run and expanding it into a powerful virtual intelligence. Sakae later encourages Kenji to take care of Natsuki during a Koi-Koi match.
The next morning, Kenji and the Jinnouchis find Sakae dead. Her youngest son Mansaku explains that she had angina, and that Love Machine had deactivated her heart monitor. Kenji, Sakuma, and most of the Jinnouchis form a plan to defeat Love Machine with a supercomputer using ice blocks as a coolant, while Natsuki and the others prepare a funeral for Sakae.
Kenji, along with Sakuma and the others, capture Love Machine, but Shota carries the ice blocks to Sakae's body, overheating the supercomputer. Love Machine absorbs King Kazma and redirects the Arawashi Asteroid Probe onto a collision course with a nuclear power plant. Meanwhile, Natsuki discovers a will left by Sakae and reunites with Kenji and the rest of the group. Natsuki has Wabisuke return home before the family reads Sakae's will, asking them to reconcile with Wabisuke. Realizing that Love Machine sees everything as a game, Kenji has the Jinnouchis confront Love Machine to play Hanafuda Koi-Koi in OZ's casino world, wagering their accounts. Natsuki wins several rounds, but gets distracted and nearly loses her "winnings".
However, OZ users worldwide enter their own accounts into the wager on Natsuki's side, prompting the system's guardian programs—the blue and red whales known as John and Yoko—to upgrade Natsuki's account. Natsuki wagers what the 150 million avatars had given to her in a single hand and critically injures Love Machine, prompting it to redirect the Arawashi towards Sakae's estate. Kenji repeatedly tries breaking into the probe's GPS, while Wabisuke disables Love Machine's defenses. After being revived and assisted by several of the Jinnouchis' avatars, King Kazma destroys Love Machine. Kenji infiltrates the GPS to redirect the Arawashi away from the estate, destroying the estate's entrance and causing a geyser to erupt. As the Jinnouchis celebrate their victory as well as Sakae's birthday, they have Natsuki kiss Kenji after they confess their love to each other.
Voice cast
Character Japanese English Ryunosuke Kamiki Michael Sinterniklaas A teenager and a moderator of the interactive computer world OZ along with his close friend Takashi Sakuma. Kenji is less skilled in dealing with people. Kenji is invited by his friend Natsuki Shinohara for Sakae Jinnouchi's 90th birthday. After receiving a cryptic code on his cell phone and cracking it, he becomes a primary suspect for hacking into OZ. Nanami Sakuraba Brina PalenciaA spirited young woman and a close friend of Kenji Koiso. She hires Kenji to meet her large extended family for her great-grandmother Sakae Jinnouchi's 90th birthday. Mitsuki Tanimura Maxey WhiteheadA second cousin of Natsuki Shinohara. His avatar is King Kazma, a renowned program in OZ. Kazuma is also a hikikomori who seldom leaves his room and uses his talents to win every game in OZ. When he is not in his room he trains in Shorinji Kempo with his grandfather, Mansuke Jinnouchi. Sumiko Fuji Pam Dougherty The 89-year-old great-grandmother of Natsuki Shinohara and indomitable head of the Jinnouchi family. Despite her advanced age she holds the family together. She also has connections in the highest ranks of political and financial circles. Ayumu Saito J. Michael Tatum A handsome and sardonic 41-year-old computer expert, a professor at Carnegie Mellon University, and the half-granduncle of Natsuki Shinohara. Naomi Miwa refers to him as Natsuki's "first love." He is the illegitimate son of Natsuki's great-grandfather, Tokue. He was adopted by Sakae Jinnouchi, whom Wabisuke cares for deeply. Takahiro Yokokawa Todd Haberkorn A 17-year-old fellow moderator of OZ and close friend of Kenji Koiso. Kiyomi Tanigawa Anastasia Muñoz The 47-year-old mother of Natsuki Shinohara. Mutsumi Sasaki Bill Jenkins The 55-year-old father of Natsuki Shinohara. Kazuo works as a member of Tokyo's water department. Mieko Nobusawa Shelley Calene-BlackThe 71-year-old daughter of Sakae Jinnouchi who works as a housewife. Takuya Kirimoto Chuck Huber The 41-year-old son of Mariko Jinnouchi. Riichi is a member of the Japan Ground Self-Defense Force and is stationed in Camp Ichigaya. Sakiko Tamagawa Cynthia CranzThe 42-year-old daughter of Mariko Jinnouchi. She works as an agent of the city's government. Ichirō Nagai John SwaseyThe 70-year-old middle son of Sakae Jinnouchi. Mansuke is an owner of a local fish market. Along with his grandson Kazuma Ikezawa, he trains in Shorinji Kempo. Takashi Kobayashi John Burgmeier The 45-year-old son of Mansuke Jinnouchi. Tasuke works as a shopkeeper of an electronics store. Yutaka Shimizu Mike McFarland The 21-year-old son of Tasuke Jinnouchi. Shota is a police officer who is extremely protective of Natsuki Shinohara. Kaori Yamagata Lydia MackayThe 42-year-old eldest daughter of Mansuke Jinnouchi who is divorced. Tagame Tamura Jennifer Seman The 39-year-old youngest daughter of Mansuke Jinnouchi and mother of Kazuma Ikezawa. Kiyomi is a care worker based in Nagoya. Throughout the film, she is pregnant with Kazuma's sister. Tadashi Nakamura Barry Yandell The 68-year-old youngest son of Sakae Jinnouchi. Mansaku monitors Sakae's health problems. Yoji Tanaka Robert McCollum The 45-year-old eldest son of Mansaku Jinnouchi. Yorihiko works as an EMT in Matsumoto's fire department. Hashiya Nakamura Patrick Seitz The 42-year-old middle son of Mansaku Jinnouchi. Kunihiko works as a fire sergeant in Suwa's fire department. Mitsutaka Itakura Christopher SabatThe 40-year-old youngest son of Mansaku Jinnouchi. Katsuhiko is a firefighter who is a member of Ueda's fire department and assists in the department's rescue squad. Eiko Kanazawa Colleen Clinkenbeard The 37-year-old wife of Yorihiko Jinnouchi. Chigusa Takaku Caitlin Glass The 32-year-old wife of Kunihiko Jinnouchi. Riisa Naka Monica Rial The 38-year-old wife of Katsuhiko Jinnouchi. She is a fanatic when it comes to watching her son Ryouhei play baseball. Naoto Adachi Jason Liebrecht The 17-year-old eldest son of Katsuhiko Jinnouchi. Ryohei plays in his local high school's baseball team. Rikito Ota Brittney Karbowski The 7-year-old middle son of Katsuhiko Jinnouchi. Yuki Imai Alison Viktorin The 6-year-old son of Yorihiko Jinnouchi. Sumire Morohoshi Cherami Leigh The 9-year-old daughter of Yorihiko Jinnouchi. Hinano Minagawa Tia Ballard The 2-year-old daughter of Kunihiko Jinnouchi.
Production
Development Following the critical and commercial success of The Girl Who Leapt Through Time, Madhouse was offered to produce a second film. Whereas Madhouse based the previous film on a novel, the studio was given the chance to create the next film. Mamoru Hosoda, the director of The Girl Who Leapt Through Time, selected a story for both people with family and those without having a family. Production of Summer Wars commenced in 2006.