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For more than 20 years, Eiichiro Oda has carefully crafted an extensive universe full of secrets, charming characters, and incredible powers inOne Piece; an adventure with more twists and turns than any manga in history. However, it seems like even the most renowned creators aren’t immune to the occasional slip-up. With a story this massive, there are bound to be a few inconsistencies — no matter how much we attempt to explain them away.

One of such more recent debates among fans involves Haki and its ability to reverse or nullify Devil Fruit’s powers. Since we’ve seen Haki do some incredible things, some fans are wondering whether Haki could reverse permanent changes made by Devil Fruits like Toki’s Toki Toki no Mi, or Shinobu’s Juku Juku no Mi. While logically it doesn’t make sense, the Wano Arc ofOne Pieceshowcased otherwise.
Haki’s Questionable Powers inOne Piece
During the Wano Arc ofOne Piece, it was highlighted that massive amounts of Haki can reverse and nullify the powers of Devil Fruit. And this concept is even further expanded inthe Egghead Arc. Thus, this concept prompted fans to theorize about Haki’s potential: If enough Haki could negate Devil Fruit’s powers, could it theoretically reverse permanent changes caused by them?
The loopholes of this concept can be better elaborated by the transformation of Kouzuki Momonosuke.u/great_holthas recently hosted a discussion on Reddit trying to analyze the effects of Haki in reversing Devil Fruit Powers.

Shinobu’s Juku Juku no Mi aged Momonosuke’s body, effectively trapping him in an adult form. Some fans argued that if Haki really could nullify Devil Fruits, it might be possible to reverse Momo’s transformation, restoring him to his original, childlike state.
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However, this theory is debunked by the story itself. Despite the overwhelming power of Haki, Momo’s condition remains unchanged. This suggests that Oda views certain Devil Fruit effects as permanent, immune to even the most advanced forms of Haki.
Eiichiro Oda’s Inconsistency inOne Piece‘s Storyline
One of the core issues thatOne Piecefans have raised is the inconsistency in how Devil Fruits are affected by Haki. The use of Haki to block or nullify Devil Fruit abilities seems to apply only to powers that do not create permanent changes.
For example, Law’s ability to teleport people or Doc Q’s female hormone disease, which can be reversed, are both temporary effects that Haki can negate. However, when it comes to powers like Toki’s time-jumping or Shinobu’s aging, these changes are depicted as irreversible.

This is where some fans believe that the inconsistency is only a matter of plot convenience. Even thoughEiichiro Odais a skilled storyteller, his story spans more than 1000 chapters. There will definitely be recurring contradictions between various aspects of a story of this length. Fans have noted that Oda doesn’t always prioritize logical consistency over emotional impact; something that many have come to accept.
The permanence of Momo’s transformation, and the irreversible effects of the Juku Juku no Mi andToki Toki no Mi, may be less about the rules of theOne Pieceuniverse and more about the direction Oda wishes to take the story.

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After all, no story is perfect, and that’s absolutely okay. Even Oda, revered as “Goda” for his Godlike presence in the manga industry, is bound to make occasional missteps — but what matters most is the emotional and thematic depth ofOne Piecethat continues to resonate with fans for a long time.
One Pieceis currently available to watch on Crunchyroll.
Moumita Chakraborty
Articles Published :931
Moumita Chakraborty is a seasoned Anime Writer at FandomWire with over 900 published articles. Passionate about the vibrant world of Japanese anime, she brings sharp analytical skills and cultural insight to every piece. From dissecting intricate plotlines to spotlighting the latest trends and releases, Moumita’s work resonates with both casual fans and seasoned otakus. Her writing aims to connect with fellow anime enthusiasts while contributing meaningfully to the ever-growing anime community.
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Eiichiro OdaOne Piece
