Zenitsu Gets a New Birthday Look From Ufotable

Zenitsu Agatsuma is officially the star of the show today.

September 3 marks Zenitsu's birthday, and Demon Slayer: Kimetsu no Yaiba is celebrating the occasion with a brand-new illustration from ufotable.

The new artwork puts Zenitsu at the center of a stage, continuing this year's birthday illustration theme for the anime's characters.

And considering everything Zenitsu has gone through, it is a fitting time to celebrate one of the series' most unpredictable Demon Slayers.

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Zenitsu Gets the Spotlight

The new birthday illustration shows Zenitsu taking center stage.

Unlike the intense battle imagery fans usually associate with him, the artwork gives the character a much lighter celebration.

It is a simple reminder of how much Zenitsu has changed throughout Demon Slayer.

He started as one of the series' most frightened characters.

Yet when it truly matters, his abilities can completely change the situation.

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September 3 Is Zenitsu's Birthday

The official Demon Slayer website confirmed today that September 3 is Zenitsu Agatsuma's birthday.

To celebrate, ufotable released a newly drawn mini-character birthday card.

The birthday celebration is also being expanded beyond the illustration.

Fans in Japan can take part in a special Zenitsu Agatsuma Birthday Event 2026 beginning today.

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Ufotable Is Turning Zenitsu Into the Main Attraction

This year's birthday theme places the characters on a stage as if they are the stars of a performance.

Zenitsu's illustration follows that concept.

The event includes special decorations, limited merchandise and birthday-themed food and drinks at participating ufotable locations.

The main celebration runs from September 3 to September 27, 2026, with some locations extending activities to September 28.

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Zenitsu's Thunder Breathing Still Makes Him Special

For all of Zenitsu's screaming, complaining and attempts to escape danger, there is another side to the character.

When he becomes serious, his fighting ability changes dramatically.

His Thunder Breathing techniques have produced some of his most memorable moments in the anime.

That contrast is a huge part of Zenitsu's appeal.

He can spend an entire scene terrified of an enemy and then suddenly become one of the most dangerous people on the battlefield.

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His Biggest Moment Came Against Kaigaku

Zenitsu's importance became even clearer during the Infinity Castle story.

His confrontation with Kaigaku, his former fellow disciple, forced him to confront someone connected directly to his own past.

The fight was not simply another Demon Slayer battle.

It was personal.

Kaigaku represented the path Zenitsu could have taken under different circumstances.

Zenitsu therefore had to fight more than just a demon.

He had to confront someone who shared the same teacher and breathing style.

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Zenitsu Has Come a Long Way

Early Zenitsu was often defined by fear.

He constantly believed that he was going to die.

He would panic whenever a powerful demon appeared.

But his development gradually revealed that his fear did not mean he was weak.

He continued moving forward despite being terrified.

That makes his later accomplishments even more impressive.

His courage is not the absence of fear.

It is what he manages to do while being afraid.

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The Birthday Event Has More Than Just Artwork

Fans celebrating Zenitsu's birthday in Japan can also find special merchandise and themed food items.

The 2026 event includes a new Zenitsu-themed illustration, limited merchandise and birthday decorations at participating ufotable cafes and related locations.

There is also a special online celebration.

A selection of Zenitsu illustrations will be released through ufotable's online channels, while a video featuring scenes from his journey is scheduled to remain available through the end of September 3.

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Zenitsu's Birthday Arrives During a Big Year for Demon Slayer

The timing is particularly interesting.

The Demon Slayer anime franchise remains heavily focused on the Infinity Castle storyline, which has given several major characters their biggest moments yet.

Zenitsu is one of the characters who received an especially important storyline in the first Infinity Castle movie.

That makes this year's birthday celebration feel more relevant than a simple character anniversary.

Fans have recently had another opportunity to see just how much Zenitsu has changed since the beginning of the series.

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The Character Still Has a Huge Fanbase

Zenitsu has always been one of the most divisive characters in Demon Slayer.

Some viewers love his comedy.

Others find his constant screaming frustrating.

But even viewers who dislike his personality often admit that his serious battle scenes are among his best moments.

That contrast has become part of his identity.

Zenitsu is loud.

Zenitsu is terrified.

Zenitsu is also capable of producing some spectacular moments when he stops running.

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Zenitsu's birthday celebration is a nice reminder of just how far the character has come.

From the terrified Demon Slayer introduced at the beginning of the series to the fighter capable of standing against extremely dangerous opponents, Zenitsu has developed into a much more capable character.

And today, ufotable has officially put him center stage.

The new birthday illustration is already out, while the special 2026 celebration is running throughout September.

For Zenitsu fans, September 3 is definitely his day.