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"Large Monk" Wadatsumi is a giant tiger blowfish fishman and a member of the Sun Pirates. He was formerly a member of the Flying Pirates under captain Vander Decken IX.


Wadatsumi is an enormous fishman, equal in size to the head of the kraken, Surume. He is large enough to make the giant-sized Shirahoshi and Megalo look like a regular-sized mermaid and shark.[4] His round head and chest are quite big in comparison to his arms and legs. His hands are webbed. He has a big, round face, with a large mouth full of massive, round teeth quite distant from one another, and child-like eyes. He has some stubble on his chin and dark hair surrounding his head, taking the shape of a protrusion pointing upward at the top, which also covers a part of his shoulders. His whole body is also quite hairy.

He apparently wears a pair of extremely loose pants paired with a dark indument tied around his waist, and has been seen walking barefoot.

His overall shape, size, and eyes strongly resemble that of Sanjuan Wolf's. Due to his appearance, Wadatsumi was incorrectly called an Umibozu by Usopp.[5] Members of the New Fishman Pirates also refer him as such.[6]


Wadatsumi Manga Color Scheme
Wadatsumi's color scheme in the manga.
Size comparison
Wadatsumi's size compared to Megalo and Shirahoshi.


He is loyal and obedient, following Decken's every command without question. Despite his huge size, his personality appears to be childlike, mirrored by his extremely childlike voice in the anime.[7] Believing Decken has abandoned him, Wadatsumi cried and complained, but recovered when he was deceived into thinking he misheard, showing that Wadatsumi is naïve and gullible.[6]

Contrary to the nasty reputation and behavior of his crew and captain, Wadatsumi seems to be more of a gentle and kind nature, as he destroyed two towns only due to sheer carelessness, which he apologized for in a genuinely remorseful manner,[8] and cheerfully celebrated with the citizens upon resolving the situation.[9]

Abilities and PowersEdit


Wadatsumi puffing himself up.

Due to his great size, and the fact that he is a fishman, he is extremely powerful. He shows his strength by hurting Ankoro, an angler fish several times the size of the Thousand Sunny, with a single punch, even though the punch was only intended to prevent the fish from eating the Straw Hat Pirates, and not to harm him. Also, living in the depths of the Grand Line, he is capable of breathing underwater as well as surviving the crushing pressure of 10,000 meters below sea level. Being a tiger blowfish fishman, he's also capable of inflating himself, thus increasing his already enormous size.

After taking an Energy Steroid, his great strength increases further by being able to defeat Surume with one blow. He also has high stamina, taking powerful strikes from Jinbe and Sanji respectively and only slightly complaining about the pain.


  • Mega Nyudo (メガ入道 Mega Nyūdō?, literally meaning "Mega Monk"): Wadatsumi inhales a large amount of air, and expands his stomach to enormous proportions, crushing anything in his vicinity. If needed, he can expand even more, furthering his size. However, he must hold his mouth to prevent the air from leaking out, and if he wishes to talk, he must speak in a fast pace to prevent air leakage. As he says, in this form he attacks by rolling into the battlefield, crushing all enemies in his way. This was first seen used against Sanji, though he indiscriminately crushed his New Fishman Pirates allies. This is called Mega Monk in the Viz manga and FUNimation sub.[10]


Fishman Island SagaEdit

Fishman Island ArcEdit

Surume Knocks out Wadatsumi

The Kraken knocks out Wadatsumi.

While the Straw Hat Pirates were sailing through the Underworld of the Sea, Wadatsumi suddenly appeared from the rocks beneath the sea. He beat an angler fish with one blow to prevent it from eating the Thousand Sunny because the captain of the Flying Dutchman, Vander Decken IX, wanted their treasure. On Vander Decken's orders, Wadatsumi attempted to punch the Thousand Sunny, but the kraken (which had been tamed by Luffy, Zoro, and Sanji) intervened and knocked out Wadatsumi.[1]

When the volcano erupted, Vander Decken ordered Wadatsumi and Ankoro to pull the ship away from the magma. As the water temperature rose, he and the Flying Dutchman were thrown forward.

Later while Wadatsumi walked on the sea floor and pulled the Flying Dutchman, Vander Decken IX asked how many years it had been that the Mermaid Princess had not replied to his letters. Wadatsumi answered that it had been ten years and the princess still had not replied, enraging Decken. In Noah in the Fishman District, Wadatsumi watched as Vander Decken IX and Hody Jones formed an alliance.

After Luffy took down Decken at Coral Hill, Decken called out to Wadatsumi to prevent Princess Shirahoshi from escaping. Before Wadatsumi attacked, Luffy beat him back with a Jet Pistol, breaking off one of his teeth. Wadatsumi cried out in pain as Shirahoshi, Luffy, and their friends escaped.

Back in the Fishman District, Wadatsumi ran away, deeply shocked that his captain "threw" Noah toward Shirahoshi.

When Noah and the Flying Pirates arrived in Gyoncorde Plaza, Wadatsumi fell into the plaza and begged for his life. Decken replied that he cannot stop the boat anymore and that he would become a necessary sacrifice for the end of Fishman Island. Fortunately, the boat went after Shirahoshi, who had left the island to sacrifice herself.

Wadatsumi Knocks out Surume

Wadatsumi knocks out Surume.

Wadatsumi was then beaten up by Surume. Saddened by Decken's betrayal, the giant had no will to fight back. Zeo talked Wadatsumi into fighting and gave him an Energy Steroid. Now stronger than before, Wadatsumi defeated Surume. He then tried to attack Jinbe, who managed to deflect the attack, causing Wadatsumi to fall to the ground. Sanji then kicked him in the head, forcing the giant to stand up. Wadatsumi fought against Jinbe and Sanji. Regardless of his size, Wadatsumi felt pain from their attacks.

Having a difficult time, Wadatsumi started inflating himself, growing to a size that doubled his normal one. Sanji, standing on Wadatsumi's cheek, was not at all afraid of Wadatsumi's new form and started mocking him, telling him that Surume is still bigger than him. Wadatsumi fell for it and sucked in even more air, growing and crushing many New Fishman Pirates in the process, with Sanji still standing firm with his previous statement.

Hell Memories

Wadatsumi is burned up by Sanji.

As Luffy pummeled Hody and Noah, Sanji stood on an almost-spherical Wadatsumi, who kept asking if the chef was surprised yet. While obviously neither him nor Jinbe were, they decided to execute their unseen plan.

Jinbe surrounded his right hand in water and hit Wadatsumi with Buraikan, which entered the giant on one side and exploded out of the other side. Wadatsumi began rolling away, but as he could not hold his breath any longer, he released the air he took in and blasted himself away. Sanji followed Wadatsumi into the sky and unleashed his rage by thinking back to the torture he had to go through during the last two years. His whole body engulfed by flames, Sanji kicked Wadatsumi with Hell Memories, a fire-attack so powerful it completely scorched Wadatsumi. With that, Wadatsumi was finally defeated. The unconscious Wadatsumi then fell on his unfortunate comrades who did not flee the plaza in time.

Surume takes care of Wadatsumi

Wadatsumi being carried away by Surume.

After the battle, a still unconscious Wadatsumi was banished from Fishman Island (because he was too big to fit in any prison they have), and was carried away by Surume to the far reaches of the ocean.[11]

Dressrosa SagaEdit

Solo Journey of Jinbe, Knight of the SeaEdit

Some time later, Wadatsumi traveled to a port town and posed as a sea god. In return for the offerings given to him, Wadatsumi raised up the homes at the bottom of the sea. He encountered Jinbe again while the former Shichibukai was investigating the disappearance of a Sea Kitten's home.[12] Having destroyed two towns due to his carelessness, Wadatsumi earned himself a scolding from Jinbe.[13] Wadatsumi and the Sea Beasts later apologized to the townspeople for the trouble they caused.[8] After they made peace with each other, Wadatsumi, Jinbe, the locals, and the Sea Beasts decided to have a feast together.[9] On the next day, Wadatsumi asked Jinbe if he could come along with him.[14] After bidding the townspeople and the Sea Beasts farewell, Wadatsumi left with Jinbe.[15]

Yonko SagaEdit

Whole Cake Island ArcEdit

Jinbe Leaves the Sun Pirates

Jinbe prepares to leave the Sun Pirates.

Wadatsumi was with the Sun Pirates while Jinbe was discussing with them about his intention to leave the Big Mom Pirates and join Luffy's crew.[16] Jinbe apologized to him for coming such a long way but Wadatsumi stated that it was alright. Later on, Wadatsumi and the Sun Pirates were instructed by Jinbe to leave Totto Land during the wedding ceremony due to security being busier with the events than focusing on them.[17]

Major BattlesEdit

Translation and Dub IssuesEdit

"Onyudo" (大入道 Ōnyūdō?), Wadatsumi's nickname, literally means "large, bald-headed monster" or "giant"; the FUNimation subs use the term "Giant Monk". "Umibōzu", which is what Usopp incorrectly refers Wadatsumi as, means "sea bonze", a Japanese mythological spirit. Wadatsumi's name itself is derived from "Watatsumi", the name of the Japanese sea god and dragon of Shinto religion.


Video GamesEdit

Playable AppearancesEdit

Support AppearancesEdit


  • He is the largest fishman to date and the only one so far to have no obvious fishman appearance to him, aside from a dorsal fin and webbed hands.
  • Wadatsumi has his own unique laugh that goes "Fugufugufugu". Fugu is the Japanese word for blowfish.
  • Similar to Fukuro, in the anime Wadatsumi is given a childish voice that does not match his physical appearance at all, but matches his childish personality.
  • Wadatsumi is the only major character who ate an Energy Steroid without showing signs of age or weakness from the drug's side-effects, though he only ate a single one, as opposed to the other New Fishman Pirates who ate several at once.


  1. 1.0 1.1 1.2 1.3 One Piece Manga and Anime — Vol. 62 Chapter 606 and Episode 525.
  2. One Piece Manga — Vol. 83 Chapter 830, Wadatsumi is seen with the Sun Pirates.
  3. One Piece Blue Deep: Characters World (p. 210), his birthday is revealed.
  4. One Piece Manga and Anime — Vol. 63 Chapter 618 and Episode 537, Wadatsumi is seen near Shirahoshi and Megalo.
  5. One Piece Manga and Anime — Vol. 62 Chapter 606 and Episode 525, Usopp refers Wadatsumi as an "Umibozu".
  6. 6.0 6.1 One Piece Manga and Anime — Vol. 65 Chapter 639 and Episode 560, New Fishman Pirates members insultingly refer to Wadatsumi as an "Umibozu" when he was crying.
  7. One Piece Manga and Anime — Vol. 65 Chapter 637 and Episode 558, Wadatsumi acts like a child after falling off Noah and hitting his head.
  8. 8.0 8.1 One Piece Manga — Vol. 78 Chapter 777, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 22, Wadatsumi and the Sea Monsters apologize.
  9. 9.0 9.1 One Piece Manga — Vol. 78 Chapter 782, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 26, Wadatsumi and the others at a feast.
  10. One Piece Manga and Anime — Vol. 65 Chapter 642 and Episode 563, Wadatsumi uses Mega Nyudo against Sanji.
  11. One Piece Manga and Anime — Vol. 66 Chapter 649 (p. 10) and Episode 569, Wadatsumi is banished from Fishman Island by Neptune and taken away by Surume because there is no prison for him.
  12. One Piece Manga — Vol. 77 Chapter 772, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 18, Jinbe and Wadatsumi meet again.
  13. One Piece Manga — Vol. 77 Chapter 774, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 20, Jinbe scolds Wadatsumi.
  14. One Piece Manga — Vol. 78 Chapter 783, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 27, Wadatsumi asks Jinbe whether he can come along.
  15. One Piece Manga — Vol. 78 Chapter 785, cover story: Solo Journey of Jinbe, Knight of the Sea Vol. 28, Jinbe leaves with Wadatsumi.
  16. One Piece Manga — Vol. 83 Chapter 830.
  17. One Piece Manga — Vol. 86 Chapter 860.

External LinksEdit

  • Umibōzu - Wikipedia article about the legendary sea monster Usopp mistakes him for.
  • Watatsumi - Wikipedia article about the Japanese sea god/dragon he is named after.
  • Takifugu rubripes - Wikipedia article about the species of fish he is.

Site NavigationEdit

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Sun Pirates
Members: Fisher Tiger   •  Jinbe  •  Aladine  •  Wadatsumi  •  Charlotte Praline
Former Members: Arlong  •  Hatchan  •  Chew  •  Kuroobi  •  Kaneshiro  •  Pisaro  •  Macro  •  Gyaro  •  Tansui
Affiliates: Koala
Weapon Based: Kiribachi
Fighting Style Based: Rokutoryu  •  Fishman Karate  •  Haki
Related Articles
Story Arcs: Arlong Park Arc  •  Amazon Lily Arc  •  Impel Down Arc  •  Fishman Island Arc  •  Whole Cake Island Arc
Location(s): Fishman Island
Others: Fishmen  •  Shichibukai  •  Arlong Pirates  •  Macro Pirates  •  New Fishman Pirates  •  Big Mom Pirates  •  Slavery
[v · e · ?]
Flying Pirates
Members: Vander Decken IX  •  Wadatsumi   •  Ankoro
Allies: New Fishman Pirates 
Ship: Flying Dutchman
Devil Fruit Based: Mato Mato no Mi
Others: Energy Steroid
Related Articles
Story Arcs: Fishman Island Arc
Others: Vander Decken