Chi: Chikyuu no Undou ni Tsuite: Story, Cast and Series Facts

Story and premise

Twelve-prodigy Rafal believes in living rationally so as to earn praise and respect from society while not being led astray by his emotions. To this end, he publicly states his intention to study theology—the academic field held in highest regard in early 15th-century Poland. However, an encounter with a mysterious man upends Rafal's life, sparking an illogical desire to pursue his passion for astronomy instead.

Rafal is determined to prove the beauty and rationality of heliocentrism—the theory that the Earth revolves around the Sun. This belief is considered heretical by the powerful Church, which promotes geocentrism—the Sun revolving around the Earth—as the sole truth of the universe. Those whose beliefs do not align with the will of the Church suffer unfathomably gruesome consequences.

In pursuit of evidence for a heliocentric model of the universe, Rafal grapples with obtaining precise calculations and building empirical theories. His greatest challenge, however, lies in conducting this research discreetly—lest he wish to meet the same fate as other heretics.

Series details

• Title: Chi: Chikyuu no Undou ni Tsuite
• Format: Animation
• Language: Japanese
• Genres: Drama, Anime, History
• Premiere date: 2024-10-05
• Final broadcast date listed: 2025-03-15
• Status in TVmaze: Ended
• Network listed by TVmaze: NHK
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVmaze community rating: 6.3/10
• TVMaze ID: 79152
• IMDb ID: tt33044444
• TVDB ID: 421583

Seasons in the TVmaze catalogue

• Season 1: premiered 2024-10-05; final listed air date 2025-03-15.

Source and licence

Adapted from Chi: Chikyuu no Undou ni Tsuite on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.