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Underwater reactor

Underwater Reactor.

The Junon Underwater Reactor (海底魔晄炉, Kaitei Makō-ro?) is a location in Final Fantasy VII. It is a Mako Reactor built underwater off the coast of Junon and provides power for Junon. It is a massive complex, going down to the bottom of the ocean floor and only accessible from a pathway in the center of Junon. The Underwater Reactor is also home to Shinra's submarine base.



A newly stable Cloud Strife and his party storm the reactor in order to grab a Huge Materia before Shinra can use it. They fight their way down to the submarine dock, but the Turks manage to store the Materia onto a submarine before the party can reach it. To catch it, the party steals a submarine and chases after them. If the player wins the submarine minigame, the Huge Materia can be found on the Bottom of the Sea.



From Junon Path - Underwater Reactor Entrance.


Overlooks the submarine dock.


Has a save point.


Guarded by guards, but no random encounters.


A crane removes the Materia.

Submarine DockEdit

Submarines are here. Carry Armor boss battle. The back area has appears as its own screen, and some items are found here.


Hugemateria underwater location

The location of the Huge Materia on the seafloor.


Red submarineEdit

There is a dog that blocks a doorway that will only move if the player loses the submarine minigame (their sub will sink). In this case the can return to the Junon Underwater Reactor and find the dog has moved. The door the dog was guarding leads to another submarine dock from where the player can get another submarine: a red one.


Junon - Outside ElevadorEdit

On Disc 1, the random battles are available by pressing the alarm (after getting Buggy). From Disc 2 on, the random battles are available by pressing the alarm and normally (after Cloud returns from Mideel).

Junon - ElevatorEdit

Junon - 1st CorridorEdit

Junon Path - Submarine DockEdit

Only if the player fails the mission of Underwater Huge Materia.

Junon Path - 2nd and 3rd CorridorsEdit


Underwater Pipe battle background.

Underwater Pipe (Both screens)Edit

Underwater Reactor - Walkway Over SubsEdit

Underwater Reactor - Corridor (save point)Edit

Underwater Reactor - Monitoring RoomEdit


Reactor battle background.

Underwater Reactor - Reactor ChamberEdit

Underwater Reactor - Submarine Dock (1st Screen)Edit

Underwater Reactor - Submarine Dock (2nd Screen)Edit

Underwater Reactor - Inside Submarine (Gray)Edit

Underwater Reactor - Submarine Bridge (Gray)Edit

Underwater Reactor - Inside Submarine (Red)Edit

Only if the player fails the mission of Underwater Huge Materia.

Underwater Reactor - Submarine Bridge (Red)Edit

Only if the player fails the mission of Underwater Huge Materia.

Musical themesEdit

"Mako Reactor"
FFVII - Mako Reactor
Trouble with the audio sample?

In the upper levels of the reactor plays "Hurry!" (急げ!, Isoge!?), but after descending down the elevator into the water tunnel, "In Search of the Man in Black" (黒マントの男を追え, Kuro Manto no Otoko o Oe?) plays. After finally taking one more elevator down and reaching the reactor proper, "Mako Reactor" (魔晄炉, Makō Ro?) plays. Once the Huge Materia is discovered, "Hurry!" plays once again, and continues until the party leaves the reactor.

Other AppearancesEdit

Final Fantasy Record KeeperEdit


FFRK Underwater Reactor FFVII
Castle Cornelia PSThis article or section is a stub about a location in Final Fantasy Record Keeper. You can help the Final Fantasy Wiki by expanding it.