In the Imperfect Cell Saga of Dragon Ball Z after Goku wakes up from his down-time recovering from the Heart Virus he mentions to Piccolo\Kami that he plans on taking Gohan, Vegeta, and Trunks to the Hyperbolic Time Chamber to train in order to beat Cell. However, I've seen every episode of Dragon Ball Z up until this point (and further) and the Time Chamber has never before been mentioned. How does Goku know of its existence?

7 Answers 7


I couldn't find a correct source about this, but I found some info about it, if you check in this wiki article the table "List of Fighters who have entered the Time Chamber" you can see that Goku enters the first time in the first Dragon Ball set, when he was a child in order to train and fight Piccolo Jr son of King Piccolo. This moment is not shown on any episode, but is implied by some conversations between he and Mr. Popo, when he used to visit the Kamisama Palace, so that's how he know about it.

  • It's actually only speculation that he possibly trained there during the Piccolo Jr. Saga... Mar 12, 2014 at 20:45
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    Actually, it's said outright that he trained there.
    – Robert
    Nov 6, 2014 at 21:20
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    I saw this page too, but I wonder where that info came from. It's never mentioned anywhere in Dragonball nor Dragonball Z, and there is also no way Goku could handle 10x earth's gravity back then (also mentioned on the wiki page) since he could barely stand up when he came to King Kai's planet (also 10x gravity). Probably just an inconsistency in the show.
    – paddotk
    Mar 20, 2016 at 1:49
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    Upon entering the room with his son, Goku told him that when he was his age, he couldn't stand staying more than a month, which means he did enter during his training, though it's never shown in Dragon Ball.
    – Clockwork
    Sep 5, 2018 at 7:41

I cannot speak for the show, but in the manga Goku mentions to Gohan that he spent a short time in The Room of Spirit and Time (manga equivalent) when he was younger. Goku mentions this when he was describing the realm within the room to Gohan when they first enter to train for the Cell Game.

  • This happened in the anime too. He mentioned staying no more than a month.
    – Clockwork
    Sep 5, 2018 at 7:42

It wasn't stated in either the manga nor episodes that Goku went into the room of spirit and time in the series "Dragonball" but in Dragonball Z, Goku states that he went in as a child. Kami and Popo can create and change things. In Dragonball super, popo changed the rules of the room, making it to where you can train in it for as long as you want. I'm not positive, but i'm pretty sure Popo didn't make kid Goku go into a room with 10x gravity. Popo probably edited the room. After all he does stock up the room.


I think the only concrete answer is that Mr. Popo was the one that lead him there, he was the caretaker of Kami and therefore knew of places that could be used to train Goku and the Z Fighters as stated here.


Mr. Popo is leading Goku, Gohan, Vegeta and Future Trunks to the Hyperbolic Time Chamber where they will train. Goku tells them that only two people may enter the Time Chamber at any one time, and so Vegeta and Future Trunks enter first.

It's possible that Goku spent time training here in the past and had knowledge that it existed but the only people that knew where it is would be Kami and Mr. Popo. It makes sense that he had been there before as well because Goku explained how the Time Chamber worked to Gohan.


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Goku explains to Gohan during their visit to the chamber that the air grows increasingly dense in the recesses beyond the plaza, which can be threatening as the Hyperbolic Time Chamber has no definite boundaries.


Episode: "The Time Room" - Piccolo Jr. Saga in Dragon Ball.

Context - King Piccolo create's one last egg before dying. Kami is aware of the potential danger that this could cause and proceeds to train Goku. As part of his training - one of the exercises is to observe the interactions between a younger Master Roshi and his rival Crane Hermit.

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    The Time Room and the Hyperbolic Time Chamber are not the same
    – Ender
    Jun 1, 2014 at 19:16
  • Sorry - completely confused myself there! But isn't that the only period in which Goku trains with Kami as a kid? Goku supposedly entered the hyperbolic time chamber once as a kid and then again when training with Gohan.
    – mustard
    Jun 2, 2014 at 7:09

I remember seeing Goku went into the H.B.C. He was there for a month. Kid Goku couldn't take the air or something. I remember seeing kid Goku run out and Kami said Goku you was only in there for 2 seconds. I remember that for some reason.

  • You should try and find some evidence that this did in fact take place and edit it into your answer.
    – TheLethalCarrot
    Oct 15, 2019 at 4:11

Since Goku tells Gohan he couldn't spend more than a month in the hyperbolic time chamber as a kid and we see all of Goku's child life, yet not all the training he went through with Kami... We can gather that he did in fact endure the hyperbolic time chamber as training for the martial arts championship vs Piccolo Jr.

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