The finale of Toho and Konami's [[ChouSeiShinSeries ChouSeiShin trilogy]], ''ChouSeiKantaiSazerX'' debuted in 2005.

In the year 2500, the Earth has been conquered by an evil race of SpacePirates known as "Neo-Descal" and covered in eternal darkness. With no other options left, the last remnants of Earth's armada send three of their ships through a wormhole [[TimeTravel that takes them back in time to the year 2005]].

According to the history books of the future, this was the year where three legendary SpacePirates from the "Descal" fleet conquered Earth by capturing the [[MacGuffin twelve mystical Cosmo Capsules]] and using their power to plunge the world into darkness. For the sake of averting this BadFuture, the heroes of the future recruit a modern man (Takuto Ando) to complete their PowerTrio and form the Super Star Fleet, Sazer X.

[[folder:List of Characters]]
!! The Sazer team:
* Takuto Ando/Lio-Sazer: TheHero
* Ado/Eagle-Sazer: TheLancer
* Kane Lucano/Beetle-Sazer: TheBigGuy
* Commander Shark/Shark-Sazer: TheMentor, SixthRanger [[spoiler: and part-pirate.]]

!! Supporting cast:
* Gordo/Sazer Gordo: TheSmartGuy; an American.
* Remy Freede: TheChick and Takuto's support technician.
[[/folder]]

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!! This show features examples of:

* AndKnowingIsHalfTheBattle
* BittersweetEnding: The heroes win, [[spoiler:but Commander Shark is erased from existence.]]
* CombiningMecha: The Ryu Sei Shin.
* DancingTheme
* DeathByIrony: Grouza, the EvilGenius of Neo Descal, constantly demeans and humiliates her ancestors despite the fact that they need to be kept alive to maintain the timeline and keep Neo Descal in existence. Later on when Thundera shows up, Grouza dismisses her as unimportant to the timeline because she's not in any records. [[spoiler:Turns out that Grouza is a descendant of Thundera and Blaird, and when Sazer X inadvertently stops them from meeting, Grouza is erased from history]].
* ElementalPowers
** PlayingWithFire: Takuto
** BlowYouAway: Ad
** ShockAndAwe: Kane
** MakingASplash: Shark
* EvilCounterpart: Jackall
* FinishingMove
** Lio-Sazer: "''Lio Fire''"
** Eagle-Sazer: "''Eagle Typhoon''"
** Beetle-Sazer: "''Beetle Slash''"
** Shark-Sazer: "''Shark Flash''"
* FreudianTrio
** TheKirk: Takuto
** TheSpock: Ad
** TheMcCoy: Kane
* GiantSpaceFleaFromNowhere
* GottaCatchEmAll: The Cosmo Capsules.
* HeyItsThatGuy: So you're telling me [[KaizokuSentaiGokaiger Barizorg]] and [[KamenRiderOOO Ankh]] were teammates before?
* LighterAndFluffier: Initially
* MirrorMatch: [[spoiler:Takuto vs Black-Lio.]]
* PutOnABus: Jackall [[spoiler:after the producers discovered the actor's gay porn past.]]
* QuirkyMinibossSquad: The Three Shoguns
* TakeAThirdOption: Pulled by the villains. [[spoiler:When Neo King Descal appears in the past, he decides that instead of following history and conquering the Earth by collecting all the Cosmo Capsules, he'll just build a DoomsdayDevice on the moon to do it for him instead.]]
* TimeTravel
* WeaponOfChoice
** Takuto: [[CoolSword Lio-Breaker]]
** Ad: [[TheGunslinger Eagle-Blaster]]
** Kane: [[AnAxeToGrind Beet-Hawk]]
** Shark: Shark-Bash

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