Akuma Island is a remote island off the coast of the hi-tech city San Fransokyo in the 2014 animated feature film, Big Hero 6. The island is now abandoned, but it was once the testing facility for teleportation technology. Its failure resulted in the desertion of the island.


Akuma Island was the location for a secret government facility owned by the ambitious Alistair Krei dedicated to teleportation research. The experiment was dubbed Project Silent Sparrow, which involved two portals to transport one object through the other end. However, during the first test with the pilot Abigail, an error that was ignored by Krei caused the re-entry portal to go haywire and become destructive. The portal was stopped, but Abigail was lost inside the portal's dimensions and presumed dead. The incident also prompted the shutdown of the facility. Abigail's father, Robert Callaghan, would become murderously enraged by his daughter's disappearance and became vengeful to Krei for his ignorance.


Some time after the accident, Callaghan resurfaces under the guise of Yokai and returns to Akuma Island in present day armed with Microbots so that he can recreate the portal with parts from the original test portal. Meanwhile, the recently-founded superhero team Big Hero 6 track Yokai to the island and discover a recording that reveals the island's history. Just then, Yokai finds the team and attacks. A battle ensues in the facility, resulting in massive damage as the members try to disable the masked man. After many failed attempts, Yokai's true identity is revealed and he is forced to retreat. While the team's leader Hiro abandons his teammates on the island in a fit of rage, Fred is able to call his butler Heathcliff to rescue them on the family's helicopter. Before departing, Honey Lemon takes the rest of the footage to investigate the connection between Yokai and the island.


The island is near the bridge of San Fransokyo and a few miles away from the city. Its surface consists of various plants and rock formations. Despite the evacuation of humans from the area, the island is still teeming with life. A large portion of the island contains the laboratory of the now defunct Silent Sparrow project. The interior of the facility is a large test chamber for the portal. An observation deck adjacent to the portals is within the room where the tests can be monitored and controlled. Due to years of abandonment and wreckage, the facility is now worn down and dilapidated compared to its former pristine state. However, several parts of the equipment are still functional in providing remnants of the facility's past.


  • Akuma (悪魔) means "demon" or "devil" in Japanese.
  • The island is the San Fransokyo version of Angel Island.