The music for the role-playing video game series Ni no Kuni, developed by Level-5 and published in Western regions by Bandai Namco Entertainment, was composed by the team of Joe Hisaishi and Rei Kondoh, and performed by the Tokyo Philharmonic Orchestra. Hisaishi, known for his previous work on Studio Ghibli films, agreed to work on the games after witnessing the development team's passion for the project. He wrote 21 tracks for the games across seven days, and was continually encouraged by the complexity of his compositions. Hisaishi aimed to make the music reflect the fantasy genre, creating a compatibility between the soundtrack and the game world.