Bad news, Toaru fans — A Certain Magical Index Season 4 is still not confirmed. As of September 2025, there’s been no official word from animation studio J.C.Staff or publisher Kadokawa about a continuation. The third season ended all the way back in 2019, and the silence since then has left fans frustrated and confused.
Things got even more complicated earlier this year when the studio announced two major projects: A Certain Scientific Railgun Season 4 and a new spin-off, A Certain Dark Side’s ITEM. For the first time ever, the Toaru franchise moved ahead without its main story — leaving Touma Kamijo’s fate hanging in doubt.
No, Index Season 4 Is Not Confirmed
Let’s clear this up right away — there’s no official confirmation for A Certain Magical Index Season 4. Any “leaks” or rumors floating around online are just fan speculation.
If there were real news, it would come straight from Kadokawa, J.C.Staff, or the official Toaru Project accounts. So far, none of them have said a word about Index’s return.
The franchise is clearly alive — with Railgun and ITEM both in the works — but Index itself seems stuck in limbo.
Why Was Railgun Season 4 Announced Without Index?
This is the big question every fan is asking. And the short answer? Business.
Index Season 3 was notoriously messy. It tried to cram nine full light novel volumes into just 26 episodes, resulting in rushed storytelling and confusing pacing. Even longtime readers struggled to follow the plot.
Meanwhile, A Certain Scientific Railgun has always been the more popular and polished series — better animation, smoother pacing, and stronger sales. It’s likely that the production committee is testing the waters with Railgun and ITEM first, to see if there’s still enough financial interest in the franchise before committing to another complex and expensive Index adaptation.
What Went Wrong With Season 3
After following this series for years, it’s clear the main issue was pacing.
The final “World War III” arc from the light novels spans multiple volumes, featuring dozens of characters and massive battles. But the anime squeezed it all into a standard two-cour season. The result? Important scenes were cut, emotional moments were lost, and newcomers were left completely lost.
In short, the show didn’t do justice to what was supposed to be the epic conclusion of the first saga.
Plenty of Source Material for a Comeback
If you’re wondering whether there’s enough story left for Season 4 — absolutely.
The anime’s first three seasons adapted the 22-volume “Old Testament” series. But the story continues into a massive 23-volume sequel, A Certain Magical Index: New Testament, and even further into the still-ongoing Genesis Testament.
In other words, there’s enough material for five or six more seasons, if handled properly.
What Would Season 4 Be About?
If Index ever returns, Season 4 would kick off the New Testament storyline.
The story picks up after the World War III arc, with Touma Kamijo navigating a world that’s subtly changed. A powerful new organization called GREMLIN, blending both magic and science, emerges as the next major threat.
Expect new characters, bigger stakes, and a darker tone. The series would likely be titled A Certain Magical Index: New Testament to mark the start of a new era.
Who Would Return?
While nothing’s been confirmed, it’s safe to assume J.C.Staff would continue to handle the animation — they’ve produced every Toaru anime so far.
Likewise, the beloved Japanese voice actors — Atsushi Abe (Touma Kamijo) and Yuka Iguchi (Index) — would almost certainly reprise their roles. After all, they’ve been the voices of these characters for over 15 years.
Where to Watch the Toaru Universe
If you want to revisit the series or start from scratch, the entire Toaru universe — including Index, Railgun, and Accelerator — is available to stream on Crunchyroll and Funimation.
For the best experience, longtime fans suggest alternating between the series for a full chronological view, but newcomers can easily enjoy them in release order too.
So… Will We Ever Get Index Season 4?
Honestly? Probably — but not yet.
The Toaru franchise has a history of long gaps. Fans waited nearly seven years between Index II and Index III. So a comeback isn’t off the table.
Right now, everything depends on how well Railgun Season 4 and A Certain Dark Side’s ITEM perform. If both become hits, it’ll send a clear message to Kadokawa: fans still want more Index.
If that happens, maybe — just maybe — Touma, Index, and Accelerator will finally return for the well-paced, faithful adaptation fans have been waiting for.
