Rengoku's final moments have prompted reactions online such as, "Could anyone encourage others like this at the moment of realizing their own death?" "Rengoku's final smile makes me cry so much," and "The gentle expression of Rengoku reflected in Tanjiro's eyes..."

The "Demon Slayer: Kimetsu no Yaiba" series is based on the manga of the same name by Koyoharu Gotoge, serialized from 2016 to 2020 in "Weekly Shonen Jump." The story, set in the Taisho era, depicts the battles of a boy, Tanjiro Kamado, whose family was killed by demons. The TV anime "Demon Slayer: Kimetsu no Yaiba Tanjiro Kamado, Unwavering Resolve Arc" started airing in April 2019 and quickly became a hot topic. The sequel film, "Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train," surpassed 50 billion yen in worldwide box office revenue. The original manga has reached a cumulative worldwide circulation of 220 million copies, marking it as a major hit in the history of Japanese manga and anime.

Following the "Tanjiro Kamado, Unwavering Resolve Arc," the TV anime continued with "Entertainment District Arc," "Swordsmith Village Arc," and "Hashira Training Arc." It has been announced that the final episodes, "Demon Slayer: Kimetsu No Yaiba The Movie: Infinity Castle," will be produced as a trilogy. "Demon Slayer: Kimetsu No Yaiba The Movie: Infinity Castle Chapter 1—Akaza Returns," released from July 18, 2025, has recorded over 29.9 billion yen in revenue in 45 days of its release.

(C)Koyoharu Gotoge / SHUEISHA, Aniplex, ufotable

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