Kingdom Hearts IV: Everything We Know About the Story, Worlds, Characters and Release

Sora is missing, Donald and Goofy are looking for him in the Underworld, and Square Enix has finally put a release window on the game built around finding out what happened. Here’s the confirmed state of Kingdom Hearts IV — release timing, platforms, story setup, worlds, cast and what’s still genuinely unknown — kept current as Square Enix reveals more.

When does Kingdom Hearts IV come out?

Late 2027, according to Square Enix’s own August 15, 2026 announcement made during D23: The Ultimate Disney Fan Event. No specific month or day has been announced, and Square Enix’s press materials continue to describe the game as available to wishlist rather than pre-order — a distinction worth keeping straight, since it means final pricing and exact release logistics haven’t been locked in publicly either.

That timing lines up deliberately with the franchise’s own history. The original Kingdom Hearts launched on PlayStation 2 in March 2002, and Square Enix has confirmed the series turns 25 in 2027, unveiling a dedicated anniversary logo alongside the platform announcement in June 2026.

What platforms is it coming to?

Nintendo Switch 2, PlayStation 5, Xbox Series X|S and PC. Square Enix confirmed the full lineup during a June 9, 2026 Nintendo Direct showcase, with a dedicated trailer built around the reveal. PC availability was later specified through the Microsoft Store on Windows, consistent with how the publisher has been distributing its PC catalogue.

There’s no confirmation yet of a Steam or Epic Games Store listing specifically for Kingdom Hearts IV, cloud versions, or any platform-exclusive content — none of that has been addressed in official materials as of this writing. Treat the current platform list as final for now, but incomplete on distribution specifics.

What is the story?

Kingdom Hearts IV picks up directly from where Kingdom Hearts III left off. After the fight with Xehanort, Sora used the power of waking to bring Kairi back — against every warning about what that power costs — and paid for it by disappearing from his own reality entirely.

He wakes up in Quadratum, a realistic modern city built to resemble Tokyo’s Shibuya district, searching for a way home. Donald and Goofy aren’t with him this time. Square Enix’s official framing splits the story in two: Sora investigates Quadratum from the inside, while Donald, Goofy and a playable Mickey Mouse search the Underworld and beyond for clues to where he went. This new arc is being called the Lost Master Arc, and it’s positioned as a genuine follow-up to the Dark Seeker Saga rather than a soft reboot — the confirmed Coco world and the returning Underworld setting both draw on locations and mythology the series has used before, just picked up from a new angle.

Two other confirmed pieces matter here. Strelitzia, a character tied to the ancient Keyblade War era explored in Kingdom Hearts Union χ, is present in Quadratum despite having died long before Sora’s time — a mystery the games haven’t resolved. And Yozora, who first appeared as a character inside an in-universe video game in Kingdom Hearts III’s Toy Box world before turning out to be real in the Re Mind secret episode, is connected to Quadratum’s imagery in ways Square Enix hasn’t fully explained.

That’s the extent of what’s officially confirmed about the plot. Square Enix has not detailed how the Coco world fits into the main Quadratum storyline, what Sora’s actual objective becomes once he understands where he is, or how the Donald/Goofy/Mickey side of the story reconnects with his.

It’s worth being clear about why this is a genuinely new starting point rather than a soft reset dressed up as one. Kingdom Hearts III closed out the Dark Seeker Saga, the arc that had run since the original 2002 game, and it closed it in a way that visibly cost something: Sora doesn’t win for free. The power he uses to save Kairi is one Master Yen Sid and others explicitly warn him not to touch, and the series has spent every game building up the idea that reality-bending power always has a price attached. Quadratum is that price made literal. Square Enix isn’t asking players to accept a new status quo on faith — the story has been building toward some kind of consequence for Sora’s habit of refusing to lose people for over a decade, and the Lost Master Arc is where that bill comes due.

What is Quadratum?

Quadratum is the realistic city Sora wakes up in — not simply another Disney world on his map, but a location the games treat as existing in a different kind of reality altogether. It looks like a contemporary Japanese city, evokes Shibuya specifically, and gives Sora himself a more grounded visual redesign than the stylized look he’s had in every previous game.

What Quadratum actually is — an afterlife, a separate reality, something else entirely — is still unconfirmed. The evidence connects it to death (Strelitzia), to fiction becoming real (Yozora, Verum Rex), and to Sora’s own reality-warping choice at the end of Kingdom Hearts III, without Square Enix settling which of those threads is closest to the truth.

That’s a lot to unpack in a release-focused overview, and it deserves its own space. Our full breakdown of Quadratum covers Strelitzia, Yozora, the Verum Rex connection and the competing theories in detail.

Confirmed and shown characters

Confirmed as playable:

• Sora, the series protagonist, navigating Quadratum
• Mickey Mouse, playable in a storybook-style world revealed in extended D23 footage — traversal involves squeezing through cracks in walls, solving puzzles, and a transformation into an airplane
• Donald Duck and Goofy, playable as they investigate Sora’s disappearance separately from him

Confirmed as returning, role unspecified beyond appearance: King Mickey (in his standard adult role, distinct from the storybook segment), Hades and a teased Maleficent, per Reuters’ account of the extended D23 panel footage.

Confirmed present in the story, not confirmed playable: Strelitzia and Yozora.

From the Coco world specifically: Miguel and Héctor, the Pixar characters Sora meets in the Land of the Dead sequence shown in the D23 trailer.

Square Enix has not released a broader cast list. Any character not named in official trailers, the official website or Square Enix’s own press materials — including long-standing fan expectations like Riku or Kairi appearing in a major role this time around — should be treated as unconfirmed until the company actually says so.

That absence is worth flagging on its own. Riku spent Kingdom Hearts III’s ending searching for exactly the kind of unfamiliar city Sora is now trapped in — his own vision of Quadratum, seen before Sora ever arrives there, is part of what made the setting feel important in the first place. Nothing in current marketing rules out a role for him, and nothing confirms one either. The gap between “narratively expected” and “officially confirmed” is exactly where Kingdom Hearts coverage tends to go wrong, and it’s worth holding the line on that distinction here specifically.

Confirmed worlds

Quadratum is the central setting and, per Square Enix’s own description, the story’s narrative hub rather than one world among many.

The Coco-inspired Land of the Dead is the first confirmed Disney/Pixar world revealed for the game, shown in detail in the August 2026 D23 trailer. Our full report on the Coco reveal covers the footage, the returning-Pixar-world pattern the series has used since Kingdom Hearts III, and what’s confirmed about how Miguel and Héctor factor in.

The Underworld returns as the setting for Donald, Goofy and Mickey’s search, based on the Hades appearance referenced above — consistent with the Greek-mythology setting Kingdom Hearts has used since the original game’s Olympus Coliseum world.

The “Paper Mickey Mouse” storybook world is confirmed to exist as a distinct gameplay segment, though Square Enix hasn’t given it an official name tied to a specific Disney film the way Coco is tied to Coco.

No other worlds have been confirmed. Speculation about specific upcoming Disney or Pixar properties beyond what’s listed here is exactly that — speculation, however reasonable given the series’ history — and doesn’t belong in a features list until Square Enix says otherwise.

Gameplay

The confirmed gameplay picture is still mostly about tone and presentation rather than detailed systems.

Quadratum combat shown in trailers keeps Sora’s real-time Keyblade action intact, rendered in the more realistic visual style the city demands — a departure from the exaggerated, storybook-adjacent look of Kingdom Hearts III’s Disney worlds. The Coco footage, by contrast, shows combat that leans back into that stylized, colorful presentation, suggesting the game will shift its visual and possibly mechanical register depending on which reality Sora — or Mickey, Donald and Goofy — is currently in.

The Mickey storybook segment is the most mechanically distinct piece shown so far: movement through environmental gaps, puzzle-solving, and a mid-level transformation into an airplane, none of which resembles standard Kingdom Hearts traversal. Square Enix has not detailed a combat system for this segment specifically.

Beyond that, no menu systems, Command Deck changes, party mechanics, or difficulty structure have been shown or discussed in official materials. Treat any specific combat-system claims beyond what’s described above as unconfirmed.

The split-cast structure is the other gameplay-relevant detail worth flagging early, because it’s a genuine departure rather than a marketing footnote. Every mainline Kingdom Hearts game has kept Sora, Donald and Goofy in the same physical space for the overwhelming majority of the runtime, even during the series’ more fractured multi-protagonist stretches like Dream Drop Distance. Sending Donald, Goofy and a playable Mickey off to investigate independently, in a different location entirely, means Kingdom Hearts IV is structurally committing to at least two separate playable perspectives running in parallel — something closer to Kingdom Hearts II’s occasional cast-switching than anything in the more recent games. How much time players actually spend in each perspective, and whether the game lets you choose or simply alternates on a fixed schedule, hasn’t been detailed.

Trailers and footage, in order

• 2020 reveal. Kingdom Hearts IV was first announced during the franchise’s 20th anniversary event, establishing Quadratum and the realistic visual direction.
• June 9, 2026 — Nintendo Direct. A new trailer confirmed the platform lineup (Switch 2, PS5, Xbox Series X|S, PC) without providing a release date. Nomura had previously said in November 2025 that development was progressing well without offering specifics.
• August 15, 2026 — D23: The Ultimate Disney Fan Event. The extended showcase trailer above debuted, confirming the late-2027 window, the Coco world, playable Mickey/Donald/Goofy, and a longer four-minute cut shown live at the event that additionally featured Hades and a Maleficent tease, according to Reuters’ report from the panel.

What we still don’t know

• The exact release date. Late 2027 is the only confirmed window.
• The full world list. Only Quadratum, the Coco world, the Underworld and the Mickey storybook segment are confirmed.
• The complete character roster. Riku, Kairi and other longtime mainstays have not been confirmed for major roles in this specific installment.
• How the Lost Master Arc’s older mysteries resolve. Strelitzia’s presence in Quadratum and Yozora’s relationship to it remain open questions the games themselves haven’t answered.
• Pricing, editions and any platform-specific content or timing differences.
• A firm combat/systems breakdown beyond what trailers have shown in short bursts.

This section is the one most likely to shrink as Square Enix reveals more — treat everything above it as the current state of the record, not a permanent one.

Why Kingdom Hearts IV matters

This is the first mainline numbered Kingdom Hearts to start completely outside the frame the series has used since 2002: a boy from Destiny Islands, traveling with Donald and Goofy, defending hearts and light across a familiar rotation of Disney worlds. Sora is alone, in a setting that looks nothing like the rest of the franchise, and the two characters who’ve been at his side through three mainline games and a decade of side stories are chasing him rather than accompanying him.

That’s a real structural risk for a series whose comfort-food rotation of Disney worlds and reliably goofy party banter is a big part of its appeal — and it’s also the clearest sign yet that Nomura is using the 25th anniversary not to replay the greatest hits, but to ask what Kingdom Hearts looks like when its most reliable formula is deliberately taken away. Whether Quadratum turns out to be a bold new direction or a mystery box the story struggles to close is exactly the kind of question a 2027 release window gives Square Enix a long runway to answer carefully.