Hiro Shimono Reveals Zenitsu Agatsuma's Secrets in "Demon Slayer"

The Excitement of "Demon Slayer: Kimetsu no Yaiba Infinity Castle"

The first chapter of the "Demon Slayer: Kimetsu no Yaiba Infinity Castle" movie trilogy made its debut in Japan on Friday, July 18, 2025. Fans around the world are eagerly awaiting its international release on September 12, 2025. This latest installment brings Tanjiro and his companions face to face with Muzan Kibutsuji, the original demon, in a dramatic showdown set within the demons’ fortress, the Infinity Castle.

As the story unfolds, fans have been treated to a series of cast interviews that highlight the depth and passion behind the characters. One such interview features Hiro Shimono, the voice actor for Zenitsu Agatsuma. In this conversation, Shimono shares his insights into portraying a new side of Zenitsu and reflects on the significance of the series.

A Journey Through Six Years of "Demon Slayer"

Shimono recalls how it feels to reach the "Infinity Castle Arc" after six years since the anime first premiered in April 2019. He expresses gratitude for the support from fans, which has allowed him to be deeply involved in the project. He notes that while there has been a lot to experience, the journey is still ongoing, and he looks forward to continuing to contribute to the series.

When asked about his approach to recording for the "Infinity Castle Arc," Shimono explains that he prepared by practicing Zenitsu’s lines from the original manga aloud. He also conducted final rehearsals before the recording sessions began, ensuring that he was fully immersed in the character.

Immersive Visuals and Engaging Storytelling

The visuals in the latest film have left a lasting impression on Shimono. He describes the depiction of the Infinity Castle as astonishing, but he emphasizes that it wasn't just the visuals and sound that captivated him. The entire 155-minute film kept him engaged without any lapses in attention, making it an immersive experience.

Shimono also highlights the richness of the content, noting that it felt incredibly detailed yet not overwhelming. Instead, it leaves viewers eager for what comes next, showcasing the depth of the narrative and the effort put into its creation.

Memorable Experiences and Future Aspirations

Throughout his involvement with "Demon Slayer," Shimono has had numerous memorable experiences. He has traveled overseas and explored various locations, including Tokushima during "Machi☆Asobi." He also mentions enjoying soba noodles and standing under a waterfall, adding a lighthearted touch to his reflections.

He acknowledges the continuous evolution of the franchise, highlighting the incredible talent and dedication of the team at ufotable. During a kickoff meeting for the movie, he was amazed by their process of creating captivating content, reinforcing his admiration for their work.

The World of "Demon Slayer: Kimetsu no Yaiba Infinity Castle"

The story follows Tanjiro Kamado, a boy who joins the Demon Slayer Corps after his younger sister Nezuko is turned into a demon. As he grows stronger and deepens his bonds with fellow members, Tanjiro faces many challenges alongside his friends, Zenitsu Agatsuma and Inosuke Hashibira.

Throughout his journey, Tanjiro battles demons with the help of the Hashira, the highest-ranking swordsmen of the Demon Slayer Corps. These include Flame Hashira Kyojuro Rengoku aboard the Mugen Train, Sound Hashira Tengen Uzui within the Entertainment District, and Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji at the Swordsmith Village.

As the Hashira prepare for the upcoming battle against the demons through the Hashira Training program, Muzan Kibutsuji appears at the Ubuyashiki Mansion. With the head of the Demon Corps in danger, Tanjiro and the Hashira rush to the headquarters, only to be plunged into a mysterious space by Muzan's hands.

This mysterious space turns out to be the demons' stronghold—the Infinity Castle. Here, the final battle between the Demon Slayer Corps and the demons begins, setting the stage for an epic confrontation.

Key Cast Members

Tanjiro Kamado: Natsuki Hanae
Nezuko Kamado: Akari Kito
Zenitsu Agatsuma: Hiro Shimono
Inosuke Hashibira: Yoshitsugu Matsuoka
Kanao Tsuyuri: Reina Ueda
Genya Shinazugawa: Nobuhiko Okamoto
Giyu Tomioka: Takahiro Sakurai
Tengen Uzui: Katsuyuki Konishi
Muichiro Tokito: Kengo Kawanishi
Shinobu Kocho: Saori Hayami
Mitsuri Kanroji: Kana Hanazawa
Obanai Iguro: Kenichi Suzumura
Sanemi Shinazugawa: Tomokazu Seki
Gyomei Himejima: Tomokazu Sugita
Akaza (Upper Rank Three): Akira Ishida