Posted by Isaac Shapiro
Isaac Shapiro

So those of you who follow One Piece may have noticed that Sanji was missing for a good chunk of the last story arc in Dressrosa, and now that he’s back, he’s the focal point of the new arc. The creator of One Piece, Eiichiro Oda, has gone all out saying that 2016 will be the year we find out Sanji’s true origin, his birth, his marriage, and pretty much anything else we ever wanted to know about him. In honor of the year of Sanji, we’re going to share a little fan theory with you that we cooked up awhile ago about the driving reason behind Sanji’s adventures with the Straw Hat Pirates: All Blue.

Sanji joins the Strawhat crew as their cook because he wants to find All Blue. For those of you unfamiliar with One Piece geography, All Blue is the mystical point where the four major seas (East Blue, West Blue, North Blue, and South Blue) converge. Supposedly, fish from all four seas can be found in All Blue, and as such, it would be an amazing resource for any chef. That sounds awesome and all, but I realized the other day that the conditions for All Blue to exist, barring some really weird plot contrivances, would only show up two places in the One Piece World. The Straw Hats have already been to both of them. Knowing that, I'm going to put forward the theory that All Blue does not exist as a physical place in the One Piece world, but Sanji will eventually create his own "All Blue."

The Grand Line

First, let me explain why I don't think that All Blue exists as a specific location. There are two defining geographic features in the One Piece world. The first is the Grand Line. The Grand Line is a strip of ocean flanked on each side by a massive calm belt. These calm belts make it nearly impossible to cross in and out of the Grand Line without propulsion. Oh, and there are also giant fish monsters that live in the calm belt. The lack of ocean current combined with the terrifying sea kings ensure that marine life from one side of the Grand Line does not mix with marine life on the other side. This line runs from northwest to southeast.

The Red Line

The second major feature is The Red Line. The Red Line is a long, thin continent that circumvents the One Piece world from northeast to southwest. There are no direct threats like the sea kings, but The Red Line is a strip of dry land that keeps the marine life on either side of it from mingling.

The Reverse Mountains

It is worth noting that there are only two commonly used ways through these obstacles. The first method is the Reverse Mountain. Ocean rivers from each of the blue seas meet here, flow up the mountain, and down into the first half of the Grand Line known as Paradise. As you can see from the picture, this is one of two places that all four seas would meet. However, the consistently stormy weather and incredibly rough currents make it a very unlikely spot for All Blue because it is doubtful that fish would be able to survive the trip up the mountain and back down into the Grand Line in any kind of edible condition. It is also one of the most frequently used points of access into the Grand Line. If it were that easy to find All Blue, you would think someone would have noticed by now.

Fishman Island

The next point of access into the Grand Line is Fishman Island. Fishman Island is an underwater gateway from the first portion of the Grand Line, Paradise, to the second half of the Grand Line, the New World. It's used by people who are prevented from crossing over the Red Line (which is directly above it and surrounds it on two sides) by the World Government. Incidentally, it's also the only other point where all four blue seas might converge.

That said, it is unlikely that Fishman Island is All Blue either. Despite being one of two spots where it would even be possible for marine life from all four seas to mingle, it very unlikely to happen. Remember when I said that the Grand Line was flanked by a calm belt on either side that are populated by sea kings? Well, that's still the case. The gateway runs through the Red Line, but it's also located in the Grand Line. Any fish from any of the blue seas that wanted to get to Fishman Island would first have to get through a calm belt filled with these guys:

For the sake of argument, let's say a few fish manage to make it through. Let me remind everyone that the passage to the New World is both permanently populated and sees its fair share of pirate activity. It is also directly below Mariejois, the seat of the World Government. If this was All Blue, again, you'd think someone would have noticed by now. You would think the cook who has spent an entire arc exploring Fishman Island would have realized that he'd just discovered the spot he'd been searching for. The closest we've gotten from him is this:

I'm going to go out on a limb and say he's not interested in cooking. When he eventually leaves, it's not exactly the reaction we'd expect from someone who has found the driving goal of his life and been asked to part with it.

The Location Of Sanji's Real All Blue

From my perspective at least, Sanji hasn't found his All Blue. He's not likely to either, since there are only two places in the One Piece world where all four seas could possibly converge, and he's been to both of them. That doesn't mean he can't fulfill his dream though. You see, if Sanji actually found a physical location that qualified as All Blue, this would cause some serious problems. It would force Sanji to chose between his professed dreams as a cook and his loyalties to Luffy and the rest of the Straw Hat crew. If he goes with Luffy, he would be putting aside his dreams. If he remains at All Blue, he ignores his friends (and the Straw Hats are down one of their best fighters).

I think Oda is smarter than that. In fact, Oda has already given Sanji the tools to create his All Blue in some limited fashion aboard the Thousand Sunny. Franky, everyone's favorite speedo-clad cyborg shipwright designed the Thousand Sunny so that it could keep live fish for extended periods of time using a built-in aquarium.

With a little patience, Sanji can create his own All Blue, and he can stay with the rest of the crew for all their crazy adventures. In fact, he'll pretty much have to keep adventuring if he wants a continuous supply of interesting new ingredients for his cooking. The crew of the Thousand Sunny never stay in one place too long, so it wouldn't be much of a stretch for Sanji to end up with fish from all over the different blue seas in the aquarium of the Thousand Sunny. Of course, I could be completely wrong. It doesn't look like One Piece is going to be ending any time soon, and there's still a lot of room for new developments.

We only just learned that apparently Sanji is a prince from a royal family that runs a mercenary nation 800 chapters into the series, so anything is possible. Still, I think it would be something of a poetic touch very much in keeping with the theme of the series if Sanji never had to leave the ship crewed (and built) by his friends to find his heart's desire.

Hopefully this is one of many anime that you watch. The genre is taking Hollywood by storm, now more than ever. Watch the video below to learn more:

Tell us what you think, though. Will Sanji find his All Blue as a physical location, or will it be something he makes on board the Thousand Sunny?