How Old Is Zenitsu Agatsuma in A Silent Voice?

Let's cut right to the chase: if you're looking for information on Zenitsu Agatsuma's age, you've come to the right place! However, there's a crucial distinction we need to make first. Zenitsu Agatsuma is a beloved character, but he is not from A Silent Voice (Koe no Katachi). Zenitsu Agatsuma is one of the main protagonists from the hugely popular anime and manga series Demon Slayer: Kimetsu no Yaiba.
It’s easy to get characters and series mixed up, especially with so many incredible anime and manga out there. A Silent Voice is a poignant and critically acclaimed film and manga exploring themes of bullying, redemption, and connection, focusing on the character Shoya Ishida and Shoko Nishimiya. Meanwhile, Demon Slayer is an action-packed, fantastical journey following Tanjiro Kamado as he battles demons to save his sister Nezuko, where Zenitsu plays a vital, albeit often comically fearful, role. Now that we’ve clarified Zenitsu’s true narrative home, let’s explore everything you need to know about his age and how it shapes his incredible journey in the world of Demon Slayer.

Setting the Record Straight: Zenitsu Agatsuma's True Narrative Home

Understanding that Zenitsu Agatsuma belongs to the Demon Slayer universe is key to appreciating his character development and storyline. His age, personality, and struggles are intrinsically linked to the dangers and demands of being a Demon Slayer. To truly grasp his significance, you might want to and see how his background informs his actions.

Zenitsu's Age in Demon Slayer: Kimetsu no Yaiba – The Official Details

During the main events of Demon Slayer: Kimetsu no Yaiba, Zenitsu Agatsuma is officially 16 years old. This age is consistently confirmed across the manga and various official supplemental materials, including character data books. His birthday falls on September 3rd, making him a Virgo. He maintains this age from his very first appearance during the intense Final Selection arc, through pivotal storylines like the Entertainment District Arc, and beyond.
While the primary narrative spans approximately two years, it's highly probable that Zenitsu turns 17 by the time of the final, epic confrontation with Muzan Kibutsuji. For those curious about his first moments of action, you can and begin to trace his path. For more personal details, and uncover what characteristics a Virgo Demon Slayer might possess.

Why Zenitsu's Age Matters: Growth, Fear, and Power

Zenitsu's age of 16 is not just a number; it's central to his physical capabilities and emotional landscape. His youthful body and developing nervous system are perfectly suited for the explosive speed and rapid recovery required by his unique Thunder Breathing technique, particularly his masterful First Form. However, this same adolescence brings with it a torrent of anxiety, profound self-doubt, and paralyzing fear, often preventing him from fully utilizing his power while conscious.
His emotional volatility, intense panic responses, and even his dramatic romantic obsessions (especially towards Nezuko) are portrayed as age-appropriate reactions to the traumatic and life-threatening situations he constantly faces. It's a testament to his character that he continues to fight despite his overwhelming fear. If you're fascinated by his combat style, you'll want to and understand its power.

Zenitsu Among Peers: A Look at the Demon Slayer Corps' Youth

Zenitsu's age places him squarely within the younger generation of Demon Slayers, alongside many of the series' core protagonists:

  • Tanjiro Kamado: Also 16 years old.
  • Kanao Tsuyuri: Shares Zenitsu's age at 16.
  • Genya Shinazugawa: Another 16-year-old in the group.
  • Inosuke Hashibira: Slightly younger at 15.
  • Nezuko Kamado: Chronologically 14 years old (though transformed into a demon for years). To delve deeper into her story, and her journey.
    This youthful cohort contrasts sharply with the generally older Hashira, the elite swordsmen of the Demon Slayer Corps, who typically range from 18 to 27 years old (e.g., Giyu Tomioka at 21, Tengen Uzui at 23). The notable exception is Muichiro Tokito, the Mist Hashira, who is remarkably the youngest at 14. Even the leader, Kagaya Ubuyashiki, is 23. This stark difference in age highlights the immense burden placed on these young heroes, especially when battling ancient demons like Akaza (200+) and Muzan Kibutsuji (1000+). To understand the full hierarchy, and their impressive backgrounds.
    In an epilogue set years later, we see an adult Zenitsu in his twenties, happily married to Nezuko. Their relationship is a sweet culmination of his unwavering devotion. You can to see how their bond evolved. For a complete overview of the ages of all the key characters, .

The Voices Behind the Fearful Slayer: Zenitsu's Voice Actors

Zenitsu Agatsuma's iconic personality is brought to life by phenomenal voice actors who perfectly capture his range from terrified whimpers to powerful, unconscious battle cries. In Japanese, Zenitsu is most frequently voiced by the incredibly talented Hiro Shimono across numerous titles. For English-speaking audiences, Aleks Le provides his memorable voice.
These actors, among others like Jose Luis Piedra, Mosè Singh, and Maxime Baudouin for the 2019 TV show, have lent their voices to Zenitsu in a variety of media, including:

  • The 2019 TV series Demon Slayer: Kimetsu no Yaiba
  • Feature films such as Mugen Train (2021) and the upcoming Infinity Castle (2025)
  • Video games like Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles (2021), Sweep the Board! (2024), and even Granblue Fantasy (2014)
    To appreciate the talent behind the character's memorable performance, and learn more about their incredible work.
    So, while Zenitsu Agatsuma doesn't exist in A Silent Voice, his journey and development as a 16-year-old Demon Slayer in Kimetsu no Yaiba are rich with detail, personal growth, and thrilling action. We hope this comprehensive overview helps clarify his role and encourages you to explore more about this wonderfully complex character within his true universe.