The upcoming original television anime series, SI-VIS: The Sound of Heroes, has released a new teaser video featuring an insert song, alongside an announcement of additional key staff members. The series, a collaboration between Aniplex and Sony Music, is slated to premiere on Fuji TV and other stations on October 5, 2025, at 9:30 a.m. JST, with Crunchyroll streaming it worldwide outside of Asia.
New Teaser Highlights Musical Action and Heroic Narrative
The recently released teaser video provides a glimpse into the anime’s unique blend of music and heroic action. It features an insert song performed by the in-show co-ed vocal unit “SI-VIS,” emphasizing the central role of music in the series. The anime’s tagline, “Artist heroes who save the world through music are born (debut),” perfectly encapsulates the concept.
The Core Concept: Idols as Secret Saviors
SI-VIS: The Sound of Heroes centers on a wildly popular co-ed vocal unit named SI-VIS, renowned for their exceptional singing and performance skills both in Japan and internationally. However, their public persona as entertainers hides their true identity: a group of heroes battling a mysterious calamity threatening to destroy the world. Their live performances are not merely concerts; they are crucial battles where the energy from the audience is harnessed to fuel their fight against evil, all while maintaining their secret identity. This unique premise combines idol culture with supernatural action, promising a fresh take on the hero genre.
Expanded Staff and Voice Cast Details Revealed
Further details regarding the anime’s production team and voice cast have also been announced, solidifying the talent behind the anticipated series.
Key Production Staff
Fumiaki Maruto, known for his work on Saekano: How to Raise a Boring Girlfriend, is overseeing and writing the series scripts, ensuring a compelling narrative. Hidari, acclaimed for character designs in titles such as Santa Company and Fractale, serves as the original character designer, giving life to the unique visual style of the characters.
Additional newly announced staff members include:
- Director: Daisuke Yoshida
- Character Designers: Naho Otsuki and Nami Fujii
- Sub-Character Designers: Mika Takahashi and Masahiro Yamanaka
- Monster Designer: Tomohisa Onoue
- Chief Animation Director: Yurie Ohtō
- Action Animation Director: Takaaki Hirayama
- Art Director: Takao Makino
- Color Key Artist: Yoshinori Horikawa
- Director of Photography: [Name not specified in search results]
Stellar Voice Cast
The main voice cast for the SI-VIS unit includes a roster of prominent voice actors:
- YOSUKE (Leader): Daisuke Namikawa (Daigo Oishi in MF Ghost)
- Siren: Ayane Sakura (Ochaco Uraraka in My Hero Academia)
- JUNE: Sōma Saitō (Wein in The Genius Prince’s Guide to Raising a Nation Out of Debt)
- Sōji: Nobunaga Shimazaki (Hyuse in World Trigger)
- μ (Myu): Akari Kitō (Nezuko Kamado in Demon Slayer: Kimetsu no Yaiba)
The vocal artists who will provide the singing voices for the in-show unit “SI-VIS” have been carefully selected from Sony Music’s top vocal talents, with further details on these performers to be revealed at a later date.
Anticipation Builds for October Premiere
With a compelling premise, a talented production team, and an exciting voice cast, SI-VIS: The Sound of Heroes is shaping up to be a highly anticipated addition to the Fall 2025 anime season. Fans can look forward to its debut on October 5, 2025, and streaming worldwide via Crunchyroll.
