In an effort to expand its anime catalog, Netflix has just launched one of the most historically significant adaptation projects this year. The Ribbon Hero (Japanese title: Ribon Hīrō), original film inspired by Princess Knight, the legendary 1953 manga series by "father of modern manga" Osamu Tezuka, has officially been broadcast worldwide since August 8, 2026.
Princess Knight: the work that gave birth to an entire genre
Princess Knight's significance to the manga industry can hardly be overstated. Considered a manga series gave birth to the shoujo genre and laying the foundation for all subsequent transformation segments of magical female warriors (magical girl), the original work tells the story of Sapphire, a princess born with both a male and a female heart, forced to disguise herself as a prince to maintain her throne. The Ribbon Hero is for the first time This work was adapted into a complete movie, instead of short television versions or excerpts as before.
Plot: Sapphire and the Ribbon Hero crown
Movie follows Sapphire, princess of the fallen kingdom of Silverland. After the disaster named Nergal Having reduced her homeland to ashes, Sapphire wanders in despair until she finds refuge among the people of Goldland. When the destructive forces of Nergal return to threaten her new home, Sapphire takes up her sword, using the mystical ribbon transformation to gain the strength needed to fight and protect those around her, thus giving rise to the name "Ribbon Hero".
The production crew and the director's gratitude
The Ribbon Hero is the director's first feature-length film Yuki Igarashi, produced by anime studio OUTLINE headed by himself, in cooperation with Twin Engine. Character design by Kei Mochizuki (Fate/Grand Order, Touken Ranbu), with collaboration on character ideas from Mai Yoneyama (Cyberpunk: Edgerunners, LAZARUS), a diverse mix of crew from many different areas of the anime and gaming industry.
"With this film, I have put into it all my respect for Osamu Tezuka, the creator of Princess Knight; for Ichizo Kobayashi of the Takarazuka Revue, the origin of the work; and for the classic, pinnacle of entertainment they have brought to the world. They also created their works while overcoming difficulties such as epidemics and wars, and those works have become the foundation of our culture.Yuki Igarashi, Director of The Ribbon Hero
Japanese voice cast
Netflix has announced the full Japanese voice cast for the film, combining veteran faces and rising young talent:
- Sapphire: Saaya Kadokura
- Pine: Seiran Kobayashi
- Velvet: Koki Uchiyama
- Zirco: Mayumi Shintani
- Rock: Yoshimasa Hosoya
- Hecate: Mito Tsukino
The English dub has not yet been announced and information is expected closer to its wider release in international markets.
- Global release date: August 8, 2026, exclusively on Netflix
- Original work: Princess Knight (1953) by Osamu Tezuka
- Director: Yuki Igarashi (first feature-length film)
- Production studio: OUTLINE, in partnership with Twin Engine
- Duration: 1 hour 49 minutes
- Character design: Kei Mochizuki
Why is The Ribbon Hero notable?
Netflix's decision to invest in a completely new adaptation of Princess Knight, rather than a completely new original series, shows that the streaming platform is looking beyond contemporary manga franchises to tap into the foundational cultural heritage of the industry. With director Igarashi publicly emphasizing his respect for Tezuka's legacy in his official statement, The Ribbon Hero positions itself not just as a typical entertainment film but as a tribute to the work that laid the foundation for the entire magical girl genre, from Sailor Moon to countless transformation series that followed.