For more than 20 years, Eiichiro Oda has carefully crafted an extensive universe full of secrets, charming characters, and incredible powers in One 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 try 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 of One Piece showcased otherwise.
Haki’s Questionable Powers in One Piece
During the Wano Arc of One 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 in the 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_holt has 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.
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 in One Piece‘s Storyline
One of the core issues that One Piece fans 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 though Eiichiro Oda is 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 and Toki Toki no Mi, may be less about the rules of the One Piece universe and more about the direction Oda wishes to take the story.
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 of One Piece that continues to resonate with fans for a long time.
One Piece is currently available to watch on Crunchyroll.
