What is the Great Treasure in “ONE PIECE”?

The heights that the ONE PIECE series has reached are on another level. Nobody can deny that. A Guinness World Record is certainly more than enough proof of its greatness. It’s also my #1 favourite series. But like so many people, I also wonder what in the world is the great treasure, ONE PIECE, which is the namesake of the series itself.  What is this mysterious treasure said to be of unimaginable value that Gol D. Roger, the Pirate King, left for all the world to seek just before he was executed?


Roger’s declaration of the existence of the great treasure ONE PIECE catalyzed the Great Era of Pirates. The ultimate goal of our main protagonist, Monkey D. Luffy, is to become the next Pirate King by claiming ONE PIECE. From the very start until now, this treasure is shrouded in mystery. Of course, we are given some hints here and there of what it might be, but we won’t know what it actually is until the series finally concludes. I can’t wait for that moment!

The Bonds of Nakama

There are so many theories among fans of what the treasure might be. Some speculate that ONE PIECE might not be an actual physical treasure like gold and gems, but the journey itself and the strong bonds between the nakama who successfully travelled the entire Grand Line to the last island, Raftel. Given the emphasis that the series put into the theme of “nakama”, this theory doesn’t sound impossible.


However, this might not be the case at all. It seems that during one interview with the mangaka—the great Oda Eiichiro-sensei himself—he confirmed that ONE PIECE will be an actual reward. But of course, he didn’t say what the treasure is. Well, duh. I haven’t seen the actual interview, so I can’t verify the validity of it but almost all ONE PIECE fan sites and forums have discussed this alleged interview.

Now that’s out of the way, let’s discuss other theories of what ONE PIECE might be:

Luffy’s Straw Hat

luffy hat-one piece

This iconic straw hat is perhaps the most important representation, not only of Luffy himself, but of his entire pirate crew. They’re called the Mugiwara Ichimi (麦わらの一味 / Straw Hat Crew), after all. It was given to him as a child by Shanks, and later revealed to be originally owned by the Pirate King Roger himself.


I personally disagree with this theory. To be honest, I find the idea that Luffy’s straw hat is ONE PIECE all along utterly ridiculous. Of course, I acknowledge its importance in the series. It’s like the symbolic proof that Luffy is Roger’s heir and the next Pirate King, and also represents their shared values regarding freedom and adventure. But as the great treasure? Hmmm. I’m not sold on this theory. Unless the straw hat is some kind of a magic key or a disguised map leading to the greatest treasure or the truth of the universe, I don’t think that the hat itself has material value other than its significance to Luffy’s relationships and character development.

The Source of the Devil Fruits

ushi ushi no mi - one piece

Another prominent but equally mysterious element in the series is the existence of the Akuma no Mi (悪魔の実 / Devil Fruits). How did these fruits came into being in the OP universe? Some fans speculate that the ONE PIECE might be the source of these disgusting-tasting but highly-coveted fruits. It might be a tree; we don’t know.

I personally don’t believe this theory. Yes, the existence of these devil fruits are important and highly valued in OP, but I don’t see the benefit of laying claim to the source of these fruits. If their source is really ONE PIECE, what advantage will you get? Do you get to reproduce all the devil fruits you wish? Do you get to control all the devil fruits in the world? Do you get to create new devil fruits? What’s the point of having this as the treasure ONE PIECE? Besides, all of these don’t sound as impressive, especially since we already know that Zoan devil fruits can be artificially manufactured. And thanks to the genius scientist Vegapunk, we also now know that even inanimate objects can “eat” devil fruits.

I admit that this theory may be possible because of the value of the devil fruits. However, having these fruits as the ONE PIECE treasure just feels disappointing from a fan perspective. I didn’t invest countless hours of my life just to have this kind of pussy ending. And I trust Oda-sensei to give us a hundred times better ending than this when the time comes.

All Blue

All Blue is the legendary sea where it’s said that all 4 seas (North Blue, South Blue, East Blue and West Blue) meet. As a result, fish from the 4 seas can be conveniently found here. Sanji’s ultimate dream is to find this mystical sea.

Hmmmm. Unless All Blue has another significance besides it being a chef’s ultimate dream, I don’t get why this could be the ONE PIECE treasure. What? Don’t tell me that the great treasure is some kind of a delicious rare fish. Although I have a feeling that Luffy will welcome this theory with open arms given his gigantic appetite.

Nah, I don’t think All Blue is ONE PIECE at all. But perhaps All Blue can be found after the discovery of ONE PIECE. It just seems appropriate that the discovery of ONE PIECE will spur the achievement of all the Straw Hats’ dreams. Wouldn’t that be awesome?

Rio Poneglyph


Rio Poneglyph is the ultimate poneglyph pieced-together from the texts of all the other poneglyphs in the world. It’s said to contain the true history of the world, including the truth from the mysterious Void Century, and of course the significance of the family carrying the D name, including the meaning of the “Will of D” (Dの意志 / D no ishi).

I personally think that this theory is most likely to be the actual great treasure ONE PIECE.  If you think about it, Rio Poneglyph can be described as the ultimate historical “one piece”. Get it? Besides, all throughout the series, we are dropped hints here and there about the significance of the “true history”, the “Void Century”, the D family as the natural enemies of “god”, and the “Will of D”. All of these questions will be answered when Nico Robin decodes the Rio Poneglyph.

Robin is the lone survivor known to date from the Ohara Incident, where its citizens were massacred by the Marines’ Buster Call. As a result, she’s the only one in the world (so far) who can read and decode the poneglyphs. Remember that Ohara was bombed to nothing because the archaeologists were researching the Void Century which is extremely forbidden.

It is greatly hinted that the truth about the Void Century will be so shocking and so ginormous that it’ll shake the entire system of the World Government and those hateful World Nobles or Celestial Dragons (天竜人 / Tenryuubito). There are so many speculations floating around of what might’ve happened during this century. Some say that the D family are the true rulers of the world before the establishment of the World Government. This actually seems likely, although of course we don’t know for sure.

If you’ll remember during the Sabaody Arc, Silvers Rayleigh admitted to Robin that the Roger Pirates learned the true history. However, he also said that the truth they discovered might not be the same as the truth the Straw Hats will discover if they successfully reached Raftel Island. He also implied that they didn’t have the power to do anything about their discovery of the truth. Perhaps this is due to Roger’s fatal illness, so he may not had enough time to act on the knowledge he got from the true history. This may be why he surrendered to the Marines to be executed, so that he could reveal the existence of the great treasure ONE PIECE, passing the opportunity to the next generation. Of course, these are all speculations, so we don’t know for certain.


Like I said, I believe that the Rio Poneglyph is the most likely form of the great treasure ONE PIECE. Its content has the potential to turn the world upside-down, so it has unimaginable value. But since the series has not ended yet, we won’t know the true form of ONE PIECE until Oda-sensei reveals it. I have a strong feeling that it’s going to be the Rio Poneglyph, and I argue that it’s the most logical based on the hints dropped throughout the series.  However, Oda-sensei is also known for throwing plot curveballs to us fans. What do we know? The ONE PIECE treasure might not be the Rio Poneglyph at all, but something else completely. We’ll know in a few years.

Here are my other (unlikely) theories of the true form of the great treasure ONE PIECE:

Actual treasure of gold, gems, etc.
I just feel that it would be too anticlimactic for the ONE PIECE treasure to be something as normal as chests of gold and jewels. Perhaps this kind of monetary treasure will be an extra to the discovery of the actual ONE PIECE, but I doubt that the great treasure itself will consist exclusively of gold and gems.

Gol D. Roger, Portgas D. Ace, Edward Newgate (Whitebeard), and all the people we wish didn’t die
Hey, this is just a theory, okay? I’m free to wish that. . .(wipes tears) Ace might still be alive. (sobs uncontrollably) But of course, I highly doubt it. Although. . .you know, this might be one of Oda-sensei’s curveballs. Still. . .this is not Naruto, so no chance of Edo Tensei (穢土転生). . .Ace!!!!!!!!

Secret to Eternal Life
Besides Trafalgar Law’s Ope Ope no Mi’s Immortality Surgery (不老手術 / Furou Shujutsu) which sacrifices his life to give eternal life, perhaps ONE PIECE is the secret to eternal life. But I highly doubt it. If this were the case, then shouldn’t Roger have used this to cure his illness and live forever instead of surrendering and getting executed? Oh well. Just a thought.

Honourable Mention:
A Hidden But Thriving Village of a Former Powerful Civilization Before the Formation of the World Government
Sort of like Atlantis but in ONE PIECE style. It’s been hinted before in the series that during the Void Century, there was a powerful civilization that the newly-formed World Goverment had to destroy in order to rule over the world. Perhaps—and this is just perhaps—the great treasure is the remnant of this lost civilization. And maybe this lost civilization is the origin of the people bearing the name of D, just like Luffy, Ace, Roger, etc. I don’t know. Seems out there, I know, but it also feels likely. We’ll see.

Reading through various fan sites and forums, there are still so many other theories floating among fans about the true form of the great treasure ONE PIECE. The ideas of my fellow fans are just so amazing, ranging from the utterly ridiculous to the perfectly logical.

How about you? Have you ever wondered what the great treasure ONE PIECE is? If so, what are your ideas about its true form?

ONE PIECE Official Website (Japanese)
Weekly Shounen Jump’s ONE PIECE Manga Official Web Portal (Japanese)
ONE PIECE on Toei Animation (Japanese)

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36 thoughts on “What is the Great Treasure in “ONE PIECE”?”

  1. Wow, so glad that you compiled some of the unanswered mysteries of One Piece together here. I am also a huge OP fan, have watched most of the series and am just about caught up on the manga. Yes, I do think those poneglyphs are the real secret. This anime has so much mystery, that’s the real interesting thing about it all. The more you watch, the more questions you get and really no answers 😦 I wish OP would drop us a few answers soon, just to satisfy us a little. Just not the way Attack on Titan did in their manga. They basically gave EVERYTHING in like…5 chapters or so. So yeah, not that, but little by little.

    God bless 🙂


  2. I watched One Piece in one binge from the beginning until the present episode and got hooked to it. I read this in its entirety and the Rio Poneglyph theory and it’s key to the Void Century made a lot of sense. Also, I believe that Raftel got its inspiration from Atlantis. We’re just halfway to the story according to Oda so I’ll read and watch slowly and regularly. Cheers to this collection of theories.

    Liked by 1 person

    1. Oh my gosh! Yes! High-five! I’m so happy for you. Isn’t it an amazing series. Surprisingly very deep, isn’t it?
      Indeed, his editor said that it’s currently about 60% finished. Almost there, but it’ll take years. Not that I’m complaining because I just want more ONE PIECE. 😉
      Indeed, the Rio Poneglyph being the ONE PIECE treasure just makes sense, but we won’t know until the very end. We know that Oda-sensei loves throwing us twists and turns…which we all love. We’ll see. I’m looking forward. And thanks very much for dropping by and commenting. I appreciate it. Keep on watching OP. Cheers!

      Liked by 1 person

      1. Yes, I do’nt regret stumbling upon One Piece last December 2015. TBH, I got nostalgic and remember watching the early episodes last month. Ah, the feels of the “Break of Romance Dawn”. Somehow, I miss the old animation of One Piece.

        Liked by 1 person

      2. High-five! Oh my gosh. Yes! This is so exciting. I know, same here. The old animation gives off a “classic” feeling. To be honest, I have a love-hate relationship with the animation of One Piece. There are episodes where the animation looks experimental and there are episodes where it looks like utter crap. It lacks consistency. Now, the animation right after the 2-year timeskip is awesome but afterwards, it returns to being inconsistent. Anyway, thanks again for discussing OP with me. I love talking about it. Cheers!

        Liked by 1 person

  3. As ridiculous as it would be if the hat was the One Piece, or an element thereof, it sounds so much like Oda’s sense of humour that Luffy was carrying some means of unlocking the treasure all along. I like your idea of the hidden village, now I’m imagining what Oda-san’s vision of an Atlantis-like lost realm would be. Would be pretty incredible, I’m sure.

    Liked by 1 person

    1. Hmmmm. I’m not really sold on the theory that Luffy’s straw hat is the treasure or some kind of a lead to the treasure. It’s just that Roger already had it way before he joined up with Rayleigh to form their pirate crew and find the treasure. But of course, we already know Oda-sensei’s sense of rumour so he’ll always get the last laugh. Ahaha. I’m looking forward to it. I know, right? It’d be interesting if there really is a hidden village from the Void Century. We’ll see. Thank you very much for dropping by and sharing some of your theories. I love talking about OP theories. Take care. Cheers!

      Liked by 1 person

  4. What an amazing post! However, I feel everyone is thinking too “small” maybe? It doesn’t seem people are taking the one piece name too literally so I’m gonna give my theory on this: I believe during the void century that there was a revolution against the rulers with the “D.” Name. The Ds must’ve originally been heroes but there was a plan to to,volt only overthrow the kingdom of D, but of utterly swallow it whole and make the world void hence “void century”. However, the Ds were smarter than this, though they couldn’t stop the revolution they could save their most valued treasure: Their history. They saved a small plot of land to live where they explained what happened during the void century in the Rio Poneglyph, a tree of life that bears the devil fruits, a grand pond that has fish from all the seas AKA the all blue, and last but not least the treasures of the D kingdom which would be more gold and jewels than the world has to offer. Also, a message from all the Ds that know of this treasure. A message telling them that the existence of this treasure “cannot be shown to others because if the entire world starts eating the fruits of the devil tree, then the devil tree will swallow not only this plot of land whole but the rest of the world” or.. Something like that. If luffy does find it, I would assume he’d be the next guardian to guard the tree and I believe One Piece should only be found by fellow D members. Maybe?

    Liked by 1 person

    1. Oh wow. A very imaginative theory. I like it! It also touches on the Tree of Life and the other mysterious elements in the series such as All Blue and the devil fruits. As for Luffy becoming a “guardian” of this treasure, well, before I can be sold to this theory, he needs to mature more because my gosh, I don’t think that he can responsibly “guard” anything except for his straw hat. But since they still have a long way to go before they reach the last part of their journey, I’m sure that everyone in the Straw Hat crew would mature, including Luffy. Your theory sounds very interesting. It’s something I’ll take and think about. Thank you very much for sharing it with me. I do love discussing theories about ONE PIECE. Keep on watching/reading OP. Take care. Cheers, my friend!

      Liked by 1 person

  5. After 700+ episodes I actually don’t care about the treasure anymore XD. I’m more in for the journey they they are on. But hey, if there is a slightest possibility…. (tears) just slightest that maybe ace can be alive… D: then oda sensei better make that shit happen. T^T our heart needs it. Luffy needs it

    Liked by 1 person

    1. Aw, that’s so sweet. I wish I can also feel that way, but I’m too curious to know about the real form of the great treasure ONE PIECE.
      I know, right? I just miss Ace so much. But let’s not deny the fact that his death was a genius move by Oda-sensei. It certainly shocked a lot of us, plus made Luffy more legendary by attempting to save him and joining in at the Summit War. Plus it triggered the crew’s power-up after the timeskip. But still, we can’t help but miss Ace. I hope Sabo doesn’t die like him.


    1. No, I don’t think that’s it. If the alleged interview with Oda-sensei is real, then we can expect something more tangible than just the proverbial “journey and friends” as the great treasure ONE PIECE. But of course, they’re also important since the series constantly emphasize the theme of “nakama”. I appreciate you dropping by. Thank you. Cheers!


  6. I read a theory about the One Piece being the four seas joined together. It was a long and complicated read, but it kind of made sense? I really hope that Oda’s plan for One Piece is dissimilar to this, but I also hope that it’s not something normal or anticlimactic as you have mentioned in your post!

    Liked by 1 person

    1. Yes, @ennadune below just said something similar. I think it’s also connected to the All Blue theory which I briefly included above. It makes sense, but we’ll see. But perhaps all of these, the Rio Poneglyph, All Blue, the Void Century are all connected and we just don’t know how until Oda-sensei reveals it to us. I can’t wait.
      I know, right? I would probably cry so badly if we get an anticlimactic ending. As fans, we’ve invested so much time and emotions to this series. Ah, please Oda-sensei! Give us an earth-shattering ending. Anyway, thank you for dropping by and sharing your opinions about these theories. I’m so happy. Take care. Cheers!


  7. Nasaan na bayang lintik na kayamanana na yan? Powtek naman oo… Eherm… Sa tingin ko, ang kayamanan na hinahanap ni Luffy at ang kanyang mga kasamahan ay isang uri ng kayamanan na kayang tumupad ng kahit na anong kayamanan. Sa tingin ko, kaya hindi kinuha ni Gold Roger ang kayamanan ay sa kadahilanang mas masaya ang paghanap sa kayamanan at pag nahanap na ito ay wala na ang surpresa kaya hindi niya ito kinuha para naman maranasan din ng ibang pirata na susunod sa kanyang yapak ang kasiyahan sa paghahanap ng kayamanan.

    Liked by 1 person

    1. Ahahaha! Oo nga naman. Powtek nga talaga. Pero parte ‘yan ng saya, ang hintayin at dahan-dahan na malaman kung ano talaga ang kayamanan na ONE PIECE.
      Ooooooh. Interesting. And dami talagang mga teorya kung ano ‘yong kayamanan. May mga may sense, may mga puno lang ng kalokohan. Pero sang-ayon ako sa sinabi mo na kaya siguro hindi kinuhi nina Roger ang kayamanan dahil mas masaya ang paghahanap. Ganyan din kasi si Luffy.
      Maraming salamat sa pagbasa ng post ko. I love ONE PIECE so talagang masaya ako na pinag-uusapan ito.


  8. So many theories!

    I was kind of half-expecting to be trolled, like Oda would end it without actually revealing One Piece (or show that it’s a real item), but I feel better knowing it’s supposed to be a real item.

    Liked by 1 person

    1. I know, right? But I can’t seem to validate this alleged interview. I want to read the actual interview, but alas, I can’t seem to find it. But oh well. So many are talking about this, so I’ll lean towards that rumour. Because I’d be terribly disappointed if Oda-sensei ends ONE PIECE without revealing the actual form of the great treasure. I’ll probably fly to Japan immediately and hunt for him. -____-
      Ehehehe. And of course, thank you very much for dropping by and commenting, Ms. President. You know I’m always happy to discuss ONE PIECE. 😉

      Liked by 1 person

  9. Really good editorial. I feel like I’m caught up on most of the theories right now. Personally, I’d like the irony of it being just your average pirate treasure. A lot of gold and such, but they can say it’s the ultimate gold or something that has unlimited value. Having it be the ultimate weapon would definitely make sense though and your reasoning is sound. It’d be pretty satisfying since it is something that is super valuable, even if Luffy would probably destroy it so nobody could claim it. Maybe Luffy would then put his hat there and leave, becoming the new Pirate King in the process.

    Liked by 1 person

    1. Thank you very much. Hmmmm. Yes, it can be considered a good irony, sort of like “Ahah! I got you!” moment from Oda-sensei to us fans, but I personally feel it’ll be disappointing for ONE PIECE to be so normal as chests of gold and gems. Besides they already experienced that when they went to Skypiea. It’d feel like a repeat of that time, but only perhaps multiply a hundredfold. But oh well, it’s just my opinion. Ooooooh. We’re all rooting for Luffy. Of course he’s going to be the Pirate King. I’m getting excited just imagining how he’s going to accomplish that. Can’t wait! Anyway, thank you very much for sharing your opinions about these various theories. I always welcome discussions about ONE PIECE. Take care. Cheers!

      Liked by 1 person

  10. I definitely agree that One Piece is related to the Rio Poneglyph. It’s hard to predict and I’m just clutching at straws here but maybe One Piece is the means to connect all the different seas into one? Something that would create one unified world, get rid of the red line (destroying Fishman Island in the process)? It’s probably also linked to the three ancient weapons, the will of D and all other mysteries woven into One Piece…

    Liked by 1 person

    1. Hmmmmm. You’ve got something there. It also connects to Madame Sharley’s prediction that Luffy will destroy Fishman Island. Ooooooh! That’s so exciting. And oh! I just realized something. If he destroys Red Line, then he also destroys Mariejois above, the home of the Celestial Dragons. By destroying it, he also simultaneously destroys the corrupt World Government! And if the Red Line is destroyed and all 4 seas are connected, then Sanji’s ultimate dream of All Blue will also come true! Oh.My.Gosh! That makes freaking sense! I love it! Thank you for your awesome theory! Ehehehe. Something to think about and expand. Oh my gosh. You must talk to me more about ONE PIECE. You must.

      Liked by 2 people

  11. I haven’t watched One Piece in a long time, (I think the last thing I remember watching was Frankie joining the crew) but this post really made me want to watch it again! I never realized how intricate the story could be!
    I gotta say after reading all of them, I will have to agree with you. I think ONE PIECE being connected to the Rio Poneglyph makes the most sense, and would also be the answer that doesn’t disappoint the fans. Being some sort of physical treasure like gold would be kind of lame, in my opinion.

    Liked by 1 person

    1. Oh no. That was a long time ago. But no worries. I’m sure you’ll find the time to catch up to it one of these days. 😉
      I know, right? That’s what I love about ONE PIECE. Non-fans think it’s shallow like other mainstream series, but it’s filled with deeper themes.
      I agree. It just makes sense for the ONE PIECE to be the Rio Poneglyph, but Oda-sensei is famous for throwing plot curveballs to us, so it might be something completely different. If that’s the case, I hope that it’s something even better than Rio Poneglyph, because if not, well, then that’s just disappointing. I know, right? Physical treasure like gold is just lame. I hope that it’ll just be an extra to the actual ONE PIECE. Anyway, I’m so delighted to hear about your own theory and opinions about this. I loooooove talking about ONE PIECE. I hope that you get the chance to catch up to it. Take care. Cheers!

      Liked by 1 person

  12. I believe that the One Piece is most definitely connected to the void century.

    But I also theorise that the One Piece may simply have been the creation of the Golden Age of Piracy itself, and that Roger merely used the lure of his “ultimate treasure” as a way to create an age of piracy that served as a host for all kinds of adventures and stories to take place.

    Maybe 😛 only time will tell!

    Thanks for your thoughts!

    Liked by 1 person

    1. I agree. The Void Century is shrouded with great mystery like the ONE PIECE, so there’s a strong indication that they’re connected. Hmmmm. I also thought about that, but if that’s really the case, it just feels kind of disappointing, you know? But yes, only time will tell. And I’m think about it but I’m curious why the Roger Pirates left ONE PIECE where they found it and didn’t take them with them. So I’m thinking that perhaps it’s not something material that they can just take out from where they found it. Hmmmmm. Anyway, I’m so excited to know what this great treasure it. I appreciate you dropping by and sharing your own theories. I love talking about ONE PIECE. Cheers!

      Liked by 1 person

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