Why Did Naokatsu Tsuda Direct That Time I Got Reincarnated as a Slime Season 4? Structural Changes and Studio Eight Bit’s Vision Explained
That Time I Got Reincarnated as a Slime Season 4 is shaping up to be a very different beast from the seasons that came before it. The biggest reason? Naokatsu Tsuda is taking over as director.
At first glance, that might look like a simple staff change. It isn’t.
For a series as established as Tensura, changing the director after three successful seasons is a pretty serious decision. Atsushi Nakayama had become strongly associated with the anime after taking over from Yasuhito Kikuchi, and fans had grown used to the way he handled Rimuru’s story.
So why Tsuda?
After looking at the scale of Season 4 and where the story is heading, I honestly think the decision makes a lot more sense than it might seem at first.
This isn’t just another season of Rimuru getting stronger, meeting new characters, and building Tempest. The story is becoming bigger, more political, more complicated, and eventually much more violent. The director needs to be able to sell that scale without letting the anime become a collection of conversations around a table.
And that’s exactly where Tsuda could make a difference.
A Director Change at Exactly the Right Time
The first three seasons had very different identities.
Yasuhito Kikuchi established the original visual language of the adaptation, while Atsushi Nakayama guided Seasons 2 and 3 through some of the franchise’s most important developments. Season 3, in particular, spent a huge amount of time dealing with Tempest’s politics, diplomacy, economics, and internal planning.
Personally, I didn’t hate that.
In fact, I like the political side of Slime. Watching Rimuru turn Tempest from a monster settlement into an actual world power is one of the things that separates Tensura from a lot of other isekai.
But anime has a problem that light novels don’t.
A conversation can be fascinating on the page and painfully static on screen.
That’s where Season 3 sometimes lost momentum for me. There were episodes where the information mattered, but the presentation didn’t always have enough visual energy to match it.
Season 4 has even more complicated material to adapt.
That makes Tsuda’s arrival particularly interesting.
Why Naokatsu Tsuda Fits the Next Stage of Tensura
If you’ve followed Naokatsu Tsuda’s career, the obvious comparison is JoJo’s Bizarre Adventure.
Tsuda was heavily involved in the anime adaptation of JoJo, working across major parts including Stardust Crusaders, Diamond Is Unbreakable, and Golden Wind. That’s a very different franchise from That Time I Got Reincarnated as a Slime, obviously.
But there’s an important similarity.
Both series can become extremely dialogue-heavy while still needing to feel visually exciting.
That’s a difficult balancing act.
Tsuda’s directing background is useful here because he understands how to make characters standing around and talking feel like something is actually happening. Camera placement, composition, pauses, expressions, dramatic cuts and visual emphasis can completely change the energy of a scene.
And Season 4 is going to need that.
Rimuru isn’t simply fighting monsters anymore. He is dealing with politicians, merchants, Demon Lords, powerful nations and people who understand that Tempest’s economic growth could completely change the balance of power.
That is much more interesting when the direction gives those scenes some weight.
Tsuda Already Had a Connection to the Slime Franchise
Another reason I like this choice is that Tsuda isn’t walking into the franchise completely cold.
He previously worked on That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond, serving as Second Unit Director.
That’s important because directing a long-running TV anime is not just about having a recognizable name.
You need to understand the franchise.
You need to know how its characters move, how its world is supposed to look, what kind of emotional beats the audience expects, and how the studio actually works.
Tsuda had already spent time inside the Tensura production environment.
So rather than saying, “Let’s bring in a completely different director and hope for the best,” Eight Bit had someone with previous experience on the property who could potentially bring a new perspective without throwing away everything that had already been established.
That feels like a much safer gamble.
Season 4 Is Going to Be Much Bigger
This is probably the biggest factor behind the decision.
The story after the Founding Festival doesn’t stay small for very long.
Tempest’s rise starts creating problems far beyond its borders. Economic influence becomes political influence, and political influence eventually attracts enemies.
The Rozzo family becomes increasingly important, particularly Granville Rozzo and Mariabel Rozzo. At the same time, the story expands toward Leon Cromwell’s territory and the larger threat represented by the Eastern Empire.
Suddenly, Rimuru’s world is filled with factions that don’t necessarily want to attack Tempest with an army.
Some want to control it.
Some want to manipulate it.
Some want to destroy its influence before it becomes too powerful.
That kind of story needs a director who can handle multiple storylines happening at once.
And that’s one of the reasons Tsuda makes sense to me.
What Season 4 Needs From Its Director
- Strong ensemble management
- Better visual momentum during exposition
- Clear staging for large-scale conflicts
- A sense of escalation between political and military arcs
- Consistent direction across a very long production
The last point may be the most important.
The Five-Cour Plan Changes Everything
One of the most interesting aspects of Season 4 is its reported scale.
The production is planned as a five-cour project, with the initial run consisting of two consecutive cours and the overall story expected to stretch across roughly 60 episodes.
That’s enormous.
We’re not talking about a short 12-episode experiment here.
A project of that size needs someone who can think beyond individual episodes. The director has to understand where the story is going several arcs ahead and make sure the buildup actually pays off.
If the production is trying to create a long-form adaptation of this scale, consistency becomes incredibly important.
You don’t want one major arc to feel like a completely different anime from the next.
You also don’t want the staff spending so much energy on spectacle that the political material becomes lifeless.
Tsuda’s biggest challenge may actually be finding the balance between the two.
The Staff Changes Are Just as Interesting
The director isn’t the only major change.
The Season 4 structure also brings several notable staff adjustments:
| Role | Season 4 Staff |
|---|---|
| Director | Naokatsu Tsuda |
| Assistant Director | Kenji Yasuda |
| Supervising Director | Atsushi Nakayama |
| Series Composition | Hitomi Ogawa |
| Music | R.O.N. |
The most interesting name there might actually be Nakayama.
He isn’t simply disappearing from the franchise.
Instead, moving into a Supervising Director position allows him to remain involved while giving Tsuda greater room to establish his own approach.
That’s a smart compromise.
You get a new creative voice without completely abandoning the experience accumulated during the previous seasons.
Will Tsuda Fix Slime’s Pacing Problems?
This is where I’d be a little careful.
I wouldn’t expect Tsuda to magically transform Slime into a nonstop action anime.
And honestly, I wouldn’t want that.
One of the reasons I enjoy Tensura is that Rimuru’s strength isn’t only about fighting. Watching him negotiate, build alliances, develop Tempest and manipulate international politics is part of the fun.
The problem isn’t that there is too much dialogue.
The problem is when dialogue doesn’t feel dramatically engaging.
That’s the distinction Season 4 needs to understand.
If Tsuda can turn political conversations into tense character scenes, then the change could be fantastic.
Imagine a meeting where everyone is technically sitting still, but the direction makes you feel that one wrong sentence could trigger a war.
That’s the kind of Slime I want to see.
My Take on the Naokatsu Tsuda Change
Honestly, I think Naokatsu Tsuda is one of the more logical choices Eight Bit could have made for this particular stage of the story.
Not because he’s automatically going to make Season 4 better than every previous season. That’s impossible to guarantee.
But because the franchise itself has changed.
Rimuru has changed.
Tempest has changed.
And the conflicts have changed.
The early Slime story was largely about survival, friendship, evolution and building a home. Now we’re moving toward something much closer to a giant fantasy political drama, where nations and powerful individuals are constantly calculating their next move.
That’s a different directing challenge.
Tsuda’s experience with huge casts, dramatic staging and long-form storytelling could be exactly what the series needs.
The biggest question isn’t whether he can direct action scenes. I’m much more interested in seeing what he does with the quiet scenes.
Can he make a council meeting feel dangerous?
Can he make Rimuru’s political decisions carry real weight?
Can he make the Rozzo storyline feel like a genuine threat instead of another exposition-heavy arc?
If the answer is yes, Season 4 could end up feeling like a genuine evolution of That Time I Got Reincarnated as a Slime, rather than simply another continuation.
And that’s why I’m actually pretty excited about the director change.
Tsuda isn’t replacing the identity of Slime. He may be exactly the person needed to show what that identity looks like now that Rimuru’s world has become so much larger.
