The Hangover 4: Tokyo Blackout (2026) revives the legendary chaos of the Wolfpack with a wild new adventure set in the neon-powered heart of Tokyo. Years after their last misadventure, the group has settled into quiet, predictable lives—until Stu is invited to Japan to speak at a high-profile medical conference. What begins as a respectable professional trip quickly turns into a reunion none of them are prepared for when Phil and Alan insist on tagging along to “support” him. Doug joins later, hoping to keep the guys in line, but the moment they arrive, the city’s electric nightlife proves too tempting.
The trouble starts when Alan befriends Kenji, an eccentric tech prodigy with a passion for experimental VR nightlife. One night, after being lured into a private club hidden beneath Shibuya Crossing, the group experiences Tokyo’s most extreme underground party scene. They wake up the next morning in a cramped apartment in Osaka—with no memory of the previous night, a blackout engulfing half of Tokyo, and Kenji nowhere to be found. Even worse, someone has left them with a prototype device belonging to a secretive robotics corporation, and every news station is reporting that the Tokyo blackout was caused by an unknown cyberattack.
Panicking, the Wolfpack begins retracing their steps. Their journey leads them through bustling game arcades, Yakuza-owned hostess bars, high-tech labs, and even a disastrous detour into a sumo training facility. Everywhere they go, they encounter fragments of the night before: a karaoke booth destroyed by Phil’s improvised acrobatics, a robotic dog that seems disturbingly loyal to Alan, and security footage suggesting that Stu may have accidentally started an international incident involving the Minister of Technology.
As the pieces come together, they learn that the blackout wasn’t a cyberattack at all—it was triggered by the prototype device they now possess, which Alan activated during the underground party. In doing so, he accidentally exposed the corporation’s illegal control experiment over Tokyo’s power grid, putting them on the run from both the police and gangsters hired to retrieve the device. The Wolfpack must now return the prototype, clear their names, and find Kenji before the corporation pins the entire blackout on them.
The final act culminates in a frantic chase through Akihabara, where the Wolfpack outsmarts the corporation using nothing but sheer luck, Alan’s bizarre instincts, and the loyalty of the robotic dog. They ultimately rescue Kenji, shut down the corporation’s scheme, and clear their names—though not before Stu unintentionally delivers the most chaotic medical conference presentation in history.
The film ends with the Wolfpack vowing never to return to Japan, only for Alan to reveal one last secret that leaves the group staring in horror—setting up the potential for yet another unforgettable disaster.
