Jaki is a hulking member of the Numbers, the band of botched giant experiments serving Kaidou's Beasts Pirates. Standing in for the digit four, he turns up as a rowdy obstacle during the clash on Onigashima before Franky cuts him down.
Topping Jaki's head is a pair of bull-like horns that bend upward and lean toward one another, while a wild mane spills down nearly to his feet. His build is squat and barrel-shaped, with stubby legs and barely any neck to speak of, which leaves him short by the standards of his fellow Numbers even though he dwarfs ordinary people. A tiny rounded nose sits above a mouth crammed with jagged teeth, two of which jut sideways like tusks. Aside from a tattered loincloth marked with a black design, he goes mostly bare, and the formal kanji for four is inked over the right side of his chest. His databook palette and his animated palette differ sharply, the cartoon swapping his skin to pink, his hair to blue, and his cloth to white.
Jaki carries himself as a boisterous heavy drinker, and he was well into his cups once the rebels turned Onigashima into a battlefield. In keeping with the rest of the Numbers, he punctuates himself with a signature cackle drawn from his own name, sounding out as Jakikiki.

Naruto vs Luffy with the twist nobody asked for: Luffy tickled Hinata on date night, and she kind of liked it. We break down the whole fight and commit to a winner....

When I first decided to commit to watching One Piece seriously, I knew I was embarking on one of anime's longest and most beloved series. With over 100...
A flawed attempt at reviving the ancient giants, Jaki still packs raw muscle to go with his bulk, hefting a club bigger than he is and lifting the Brachio Tank V one-handed. That power did him little good against Franky, whose Radical Beam caught him square in the face and dropped him in short order. Over two decades earlier he was one of the test subjects of a Punk Hazard experiment meant to recreate the old giants; the project flopped, but Kaidou scooped up the survivors and folded them into his crew on Onigashima as the group called the Numbers. After Oden's execution, Jaki helped run down the fleeing Scabbards, seizing Inuarashi and Nekomamushi while the two were too busy quarreling to notice. He later traveled to Onigashima alongside Scratchmen Apoo ahead of the Fire Festival, and during the raid he, Juki, and Goki cornered Usopp and Chopper before Franky put him out of the fight.
Jaki is a hulking member of the Numbers, a group of botched giant experiments serving Kaidou's Beasts Pirates, standing in for the digit four.
During the raid on Onigashima, Jaki joins fellow Numbers Juki and Goki in cornering Usopp and Chopper, but he is ultimately defeated when Franky's Radical Beam catches him square in the face.
The Numbers are failed test subjects from a Punk Hazard experiment meant to recreate the ancient giants; Jaki was one of the survivors that Kaidou recruited into his crew on Onigashima.
Jaki fights with a massive spiked club, a weapon so large that he is able to lift the Brachio Tank V one-handed thanks to his raw strength.
Jaki punctuates himself with a signature cackle drawn from his own name, sounding out as Jakikiki, in keeping with the rest of the Numbers.
Looking for more on Jaki? The One Piece Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Rights holders
All rights belong to their respective owners.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
Official resources:
Daddy Jim Headquarters maintains this encyclopedia. If you spot an error, a translation issue, or something that doesn't look right, let us know.