Background and development Takashi Yamazaki in 2023.
Toho first approached then-emerging filmmaker
Takashi Yamazaki around 2005, while he was making
Always: Sunset on Third Street, with an offer to direct a
Godzilla film. Yamazaki declined at the time, concluding that his
Godzilla would need to be entirely made with
computer-generated imagery (CGI), which was not yet feasible with the then-limited CGI technology available in Japan. Two years later, Yamazaki incorporated a dream-like sequence featuring Godzilla into
Always: Sunset on Third Street 2 (2007).
Godzilla Minus One producer
Kazuaki Kishida later explained that Toho kept Yamazaki in mind for a future
Godzilla project, viewing it "not as a question of if but when to do it". Following the critical and commercial success of
Shin Godzilla (2016) in Japan, Toho received numerous proposals for live-action follow-ups. According to producers
Kenji Yamada and Kishida, studio executives rejected these ideas, believing the next film needed to be entirely new and exceptional.
Godzilla Minus One ultimately became Yamazaki's third time working on a production utilizing Godzilla, as he also created the
motion simulator attraction
Godzilla the Ride: Giant Monsters Ultimate Battle (2021) for
Seibu-en during pre-production.
Godzilla (2014) director
Gareth Edwards identified Spielberg's films
Close Encounters of the Third Kind (1977) and
Jurassic Park (1993), and
Christopher Nolan's
Dunkirk (2017) as other evident influences on the film. A
novelization of the film, written by Yamazaki, was published in Japan by
Shueisha on November 8, 2023. The novel features a scene set on Odo Island that Yamazaki proposed for the film but was left unfilmed since Toho refused to allow him to do
pick-ups.
Casting (pictured in 2017) performed her scenes for the film and
Hirokazu Kore-eda's
Monster simultaneously. Yamazaki sought to cast talented individuals who were able to give convincing performances of people living during the Shōwa period and could make Godzilla's presence in the film seem more realistic. His casting decisions were influenced little by the previous
Godzilla films, since this movie was about the lives of ordinary Japanese in the 1940s rather than politicians, bureaucrats, scientists, and the
Self-Defense Forces. The reason for this was that Yamazaki wanted audiences to empathize with and connect with the characters despite the post-war setting. During preproduction, producer Minami Ichikawa offered
Ryunosuke Kamiki and
Minami Hamabe to play the film's leads, Kōichi Shikishima and Noriko Ōishi, prior to them playing similar roles in the
NHK drama series
Ranman (2023). According to Yamazaki, the media criticized this casting, believing it would be too similar to their roles in
Ranman, when it was disclosed the two would star in the film at a press conference on September 4, 2023. Yamazaki also revealed that he cast
Kuranosuke Sasaki as Captain Seiji Akitsu because of his performances in
Asadora such as
Hiyokko (2017), which had a major influence on him. One of the producers approached
Sakura Ando about playing the role of Shikishima's neighbor before the COVID-19 outbreak, but she had to wait several years to play the role. However, when she finally got the chance to act, the producer suggested that she choose between playing in the film or
Hirokazu Kore-eda's
Monster since they were being filmed simultaneously. Refusing to make an appearance in just one of the films, Ando said she "fought for it and in the end [...] got to be in both". Ōishi and Shikishima's adopted daughter Akiko was originally planned to be a boy. After meeting two-year-old
child actress Sae Nagatani, however, Yamazaki decided to change this in order for her to play the role. When questioned how he managed to get Nagatani to cry for some scenes, the director responded "I found a genius".
Creature design The design of Godzilla in
Minus One is a variation of the one in
Godzilla the Ride. Inspired by the
Godzilla, Mothra and King Ghidorah: Giant Monsters All-Out Attack design, Yamazaki initially envisioned his design having "half-moon shaped eyes", but modeling head Kosuke Taguchi gave it "almond-shaped" ones instead, with the final design having "golden, almond-shaped eyes". Yamazaki also elaborated that since the crew created this Godzilla in digital form: "it allowed for much more detail than what was possible with any type of handcrafted version. So we were able to increase the resolution of the scales, for example, and make them feel really, really sharp and give it this aggressive texture. And in terms of the bottom half of Godzilla, we made it feel very heavy and dense in a way that made the viewer feel like this mountain and triangular silhouette was walking and moving through a space." Yamazaki attempted to make this Godzilla the most horrifying version yet. The crew designed Godzilla to be ferocious, violent, and dynamic, with a static, god-like aspect. Its dorsal fins were made more "spiky and ferocious" than the incarnation in
Godzilla the Ride, as if its regenerative energy had become disorderly. Yamazaki stated that the team also tried to make Godzilla the "deadliest in history" adding that it is "discerning today, experiencing the freshness and fear felt by audiences at the time".
Filming used in the film on display at the
Tachiarai Peace Memorial Museum Principal photography took place on location in the
Chūbu (in the
Aichi and
Nagano prefectures) and
Kantō regions of
Honshu, starting on March 13, 2022, and
wrapping on June 20. Robot declared in February that, due to the film's post-war Japan setting, there would be restrictions on the extras' costume sizes, hairstyles, and hair colors (with hair dyeing being prohibited) for extras participating in filming. The maritime sequences were filmed at
Lake Hamana and in the
Enshū Sea. Between April and June 2022, several community businesses near the
Tenryū River helped the crew modify and maintain boats to shoot navy scenes in Enshū. Other shooting locations included the City Hall in
Okaya, Nagano, the Tsukuba Naval Air Group Memorial Museum in
Kasama, the Former Kashima Naval Air Base Site in
Miho, and the Shimodate General Sports Park in
Chikusei. Scenes featuring the Kyushu J7W
Shinden were partly realized through the construction of a 1:1 scale replica of the aircraft, of which only a single example exists and is located outside Japan in the collection of the
Steven F. Udvar-Hazy Center in
Chantilly, Virginia. Yamazaki noted that "Initially, the budget didn't allow for any portion of the [airplane] to be built" but "thinking outside the box, having a plan B, we were able to find a museum that was willing to purchase the prop after the film was made, which offset the production budget it would have taken to produce the plane in the first place". Thus, following the completion of shooting, the replica was transported to and put on display at the
Tachiarai Peace Memorial Museum in
Chikuzen, Fukuoka in July 2022. Toho donated the replica under anonymity, only revealing their involvement in the construction of the model after
Godzilla Minus One released.
Post-production Visual effects All 610 of the film's visual effect shots were handled by a crew of 35 artists at
Shirogumi's
Chōfu studio, under the supervision of Yamazaki and direction of
Kiyoko Shibuya. According to the
Los Angeles Times, between a quarter and a third of the film's budget was spent on visual effects. Eight months were spent on creating the visual effects. A
TV Shinshu special about Yamazaki released in October 2023 indicated that the team began creating the effects for the film in July 2022. Shirogumi indicated by opening a recruitment call for visual effects designers and compositors in August 2022, that post-production had begun and visual effects were taking place from that same month until January 2023; they later changed the dates to between November 2022 and February 2023. Their website named the 3D animation software
Houdini and
Maya for design and
Nuke for compositing. Yamazaki had made a 3D
maquette design on
ZBrush, with Taguchi augmenting the design by adding his own elements, including the insertion of polygons and rendering displacement maps using
Redshift. Then, the team
retopologized the maquette design and finalized the displacement maps with
Mudbox. After the visual effects were finished, post-production concluded in late May 2023. The ocean sequences were originally not intended to be as sizable in the film until compositor
Tatsuji Nojima, who composes computer-generated water at home as a hobby, presented Yamazaki with some of his water simulations, inspiring the director to rewrite its climax and include more scenes set at sea. The team strived to create these sequences, especially Godzilla's destruction scene. Yamazaki reflected that "It put a huge strain on all of our rendering engines, so we created so much data in the process that when we added it all up it was easily over a petabyte. In the end, we erased the data from the scene where it was done, and made it while opening the hard disk." Yamazaki informed Shinji Higuchi that the film's destruction sequences and on-screen deaths were inspired by the Shibuya sequence from
Gamera 3: Revenge of Iris, in which Higuchi directed the effects. Some of the characters present on-screen during Godzilla's rampage were created using Houdini; around 60 extras were 3D scanned to be replaced by a digital duplicate. Yamazaki also paid homage to previous
Godzilla films by not using any "muscle simulation" for the monster and employed miniatures to depict the post-war Tokyo townscape, which is a traditional Japanese special effect (or
tokusatsu) technique.
Music and sound effects Yamazaki's frequent collaborator
Naoki Satō scored the film, drawing inspiration from
Studio Ghibli's anime movies for the poignant scenes and the music of
Akira Ifukube to accentuate the
kaiju sequences. released
Godzilla Minus One Original Soundtrack, on CD in Japan on October 28, 2023, with a limited edition
vinyl following on November 24. On January 19, 2024, Toho announced that
Waxwork Records would release the score on vinyl overseas, with pre-ordering starting that same day. Natsuko Inoue handled the sound effects. She felt it was her mission to recreate the original Godzilla's roar using a modern sound system. Having tried many methods to keep the sound intact, Inoue decided that it wasn't strong enough, so she opted to record outdoors and use the echoes to enhance it. She decided to play the roar at the
ZOZO Marine Stadium to create the fresh sound effect she desired, believing it was the only stadium that could meet the requirements they needed as it had huge speakers, no ceiling, was spacious, and was slightly sloped. Reminiscing on enhancing the roar at the stadium, Inoue said "I'll never forget the emotion I felt when I played it from the biggest speaker behind the electronic bulletin board"; Yamazaki recalled, "I felt a shiver in the pit of my stomach when I thought that people who actually saw Godzilla would hear this sound." After the crew played the sound at the stadium, they received several complaints from nearby residents. Producer Gō Abe stated that sound effects from the were utilized for the scene where Godzilla attacks a
63 series train, as the crew sought to enhance the postwar setting through practical sounds.
Black-and-white edition During post-production, colorist Masahiro Ishiyama was assigned to create a black-and-white version of the film, titled . Yamazaki proposed that Godzilla's atomic breath should remain in color for the black-and-white edition, similar to how
Akira Kurosawa's black-and-white
crime film High and Low (1963) features colored smoke in one scene. However, this concept was rejected by the rest of the crew. In regards to the
Minus Color version, the director said in a statement: "Rather than just making it
monochrome, it is a cut-by-cut. I had them make adjustments while making full use of various mattes as if they were creating a new movie." This version was also the last credit for producer
Shūji Abe, who died on December 11, 2023; Yamazaki and the visual effects team paid tribute to Abe in their
acceptance speech at the
96th Academy Awards. Toho released
Minus Color in Japanese theaters on January 12, 2024, and in the United States on January 26, where it played until February 1. ==Thematic analysis==