Development
Conceived as a project for Level-5's tenth anniversary, Ni no Kuni: The Another World was announced in the September 2008 issue of Famitsu, as a title for the Nintendo DS. In June 2010, Level-5 announced that the game would also be released for the PlayStation 3, with significant differences; the DS version was renamed Ni no Kuni: Dominion of the Dark Djinn, while the PlayStation 3 version was given the title Ni no Kuni: Wrath of the White Witch. Both versions were revealed to be in development separately, only retaining the same "story axle", while features such as artwork, graphics and specifications all received significant changes. Some character names were changed for the English version: Shizuku was changed to Drippy, Maru to Esther, Jairo to Swaine, Lars to Marcassin, and Jabou to Shadar, among others. Journalists noted that the game's announcement ignited widespread anticipation within the gaming industry.
Level-5 collaborated with Studio Ghibli to produce the game's animated sequences, and the game features graphics and visuals replicating the traditional animation style of Studio Ghibli films. The collaboration began when musician Naoya Fujimaki, who had previously worked with both companies, introduced Level-5 president Akihiro Hino to Studio Ghibli president Toshio Suzuki. At the time, Studio Ghibli had completed work on Ponyo (2008), and the animation team had no ongoing projects, which influenced Suzuki's decision to collaborate with Level-5. Another influencing factor of the collaboration was witnessing Hino's passion for the project. Studio Ghibli approached the production process in the same way that they would create an animated film. Work on the animation began in July 2008, and took much longer than the predicted three months.
Studio Ghibli's Yoshiyuki Momose served as the director of animation, drawing character designs and storyboards. Hino wished Dominion of the Dark Djinn and Wrath of the White Witch to have a heartwarming feel; the artwork and character movements was greatly inspired by Studio Ghibli's work, particularly due to their attention to detail, as well as their talent in creating storyboards and utilizing camera control. The development team constantly watched Studio Ghibli's films during development. The team wanted the theme of the game to resonate with children; they initially considered the idea of expressing adventure and dreams. They later explored the concept of a child's greatest influence, their mother, and the possibility of losing them. The game's main playable character, Oliver, is a 13-year-old boy. The team decided to make him a child as they wished to showcase a coming of age story. They wanted children to empathize with Oliver's development, and adults to relive the excitement of their adolescence.
For Dominion of the Dark Djinn, the development team found that the Nintendo DS was best suited to the game's development. Alongside the launch of Dominion of the Dark Djinn on December 9, 2010, Level-5 also launched the first chapter of Hotroit Stories for mobile devices through the Roid service. Wrath of the White Witch was developed for the PlayStation 3. The team planned to bring the game to the console from the beginning of development, but opted to work on the DS version of the game beforehand due to the larger number of DS users in Japan at the time. The team found they could render the game world with great detail, using the hardware to its full potential to present the animation, world and music. Hino felt that the PlayStation 3 version allowed the game's music to accompany the imagery, which was not possible on the DS version.
Following the Japanese launch of Wrath of the White Witch on November 17, 2011, Level-5 developed Daibouken Monsters. The development of the game is the result of a comprehensive partnership between Level-5 and GREE, which resulted in the former developing three titles for the latter. Early registrations for the game began on March 21, 2012, and it launched for mobile devices through the GREE service on May 11, 2012.
Level-5 worked with localization company Shloc to translate Wrath of the White Witch for Western regions; the two studios collaborated for many weeks. The team found great difficulty when localizing the game for Western regions, particularly due to the large amounts of text and audio that required translation. Other minor changes to the artwork and animation also occurred, such as making Oliver bow in a Western manner. By December 12, 2012, development on the localized version of Wrath of the White Witch stopped as the game was submitted for manufacturing. It was released in North America on January 22, 2013, in Australia on January 31, and in Europe on February 1. The game was released for the Nintendo Switch on September 20, 2019, alongside a remastered version for the PlayStation 4 and Windows, featuring enhanced graphical capabilities. The remastered version was released for Xbox One and Xbox Series X/S on September 15, 2022.
Ni no Kuni II: Revenant Kingdom was announced at PlayStation Experience on December 5, 2015. It was released for the PlayStation 4 and Windows on March 23, 2018, and for Nintendo Switch on September 17, 2021; it is scheduled to release for Xbox One and Xbox Series X/S on March 21, 2023. Studio Ghibli was not directly involved with development. Hino said that the game aimed to better fulfill the ambitions of the original game, with deeper stories and improved visuals. In June 2019, Hino stated that a third main instalment in the series was in development.
A third mobile game, titled Ni no Kuni: Cross Worlds, was released for Android and iOS in Japan, South Korea, and Taiwan on June 10, 2021, developed by Netmarble. Hino approached Netmarble in early 2018 with a proposal for an MMORPG based on Ni no Kuni, having been impressed with its previous game Lineage 2: Revolution. Netmarble general producer Bum-jin Park felt that the artistic style of the series would work well on mobile devices, though noted that it caused some trouble as the development team wanted to preserve its value. The game was developed independently by Netmarble based on initial guidelines presented by Level-5. Its three-year development involved core members of the team from Lineage 2: Revolution. The developers intend to release updates for the game every two weeks in response to player feedback.
Music
When Studio Ghibli agreed to produce the animated sequences of Ni no Kuni, they contacted Joe Hisaishi to work on the game's music. Hisaishi, who previously worked with Studio Ghibli on films such as Princess Mononoke (1997) and Spirited Away (2001), met with Hino. After witnessing Hino's passion for the project, Hisaishi agreed to work on the game's soundtrack. Rei Kondoh also created background music for the score, and all in-game music was performed by the Tokyo Philharmonic Orchestra. "Kokoro no Kakera", the theme song for Dominion of the Dark Djinn and Wrath of the White Witch, was written by Hisaishi; his daughter Mai Fujisawa performed the song in Japanese, while chorister Archie Buchanan performed the English version. The team found great difficulty in selecting a performer for the English version, though ultimately settled upon Buchanan due to his ability to convey the "vulnerability and innocence" of the game's characters in a "moving and powerful performance". For the orchestral music to fit onto the Nintendo DS at a high quality, Ni no Kuni: Dominion of the Dark Djinn was shipped on a 4-gigabit game card. Hisaishi also worked on the score for Ni no Kuni II: Revenant Kingdom.
Two Ni no Kuni soundtracks were commercially released. An album titled Ni no Kuni: Shikkoku no Madoushi Original Soundtrack was released in Japan on February 9, 2011, featuring music from Dominion of the Dark Djinn. A two-disc soundtrack was later released on March 28, 2013; the first disc is a re-release of the Japanese soundtrack, while the second disc contains additional tracks from Wrath of the White Witch.