Summary
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Fishman Island has highlighted the profound relationships of human fish despite the bad weak and foolish moments.
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Amazon Lily has humanized the members of Shichibukai as Hancock and has delivered a single building in the world.
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Reverse Mountain has revealed Crocus and the convincing backbone of Laboon between lesser known arches.
Every time the straw hats go down the sun and on a new island One piecethey will also enter a bow of brand new history. While arches such as Marineford, Alabasta and Arlong Park can receive many praise for their fights, the development of the character and the construction of the world, not all the arches in this longtime story are rethought with affection by many fans, or even remembered, for one reason or another.

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One piece: characters who deserved more time
Some more times for these One Piece characters would have been great to explore their beliefs, background and powers.
While some people can minimize these arches, they still offer many exciting content in which fans can dig, which has ended up making them a little underestimated. These arches may not receive many prauses of some of the biggest sections in history, but they still deserve much more credit for what they offered history and its characters. Having said that, it's time to see which underestimated arches One piece It only deserves a little more credit than they tend to receive.
8
Fishman Island
Sudden gaffs and a little brilliant bad can hinder the excellent writing of Fishman Island
Fishman Island has problems, it cannot be denied that, but very often these problems can obscure people's perceptions on the arch as a specifically, the stimulating message at the center of writing. Of course, the constant nose of Sanji Sanguina and Hody Jones as a bad guy are two main weaknesses, but this is also the arch who in the end has dug deep in the freezing relationship between humans and fisherman, who was set for the first time to Arlong Park.
Seeing the stories of Fisher Tiger and Otohime creates some of the most emotional scenes of the entire series, resulting in an arch that presents a huge amount of construction of the world. Some may not evaluate it a lot due to the few problems of Fishman Island, but the excellent writing of the character still makes him an exceptional and rather underestimated span of history.
7
Amazon Lily
Amazon Lily deserves more credit for how she managed to humanize a Shichibukai member
Amazon Lily is an arch that comes before Impel Down and Marineford; Two of the most loved parts of the entire story between most of the fan base. As a result, it is often seen only little more than a launching pad in the Luffy mission to save Ace, and although it is not technically not wrong, this is also the first time that Luffy has a random conversation with a shichibukai.

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The best friendships in a single piece, classified
In all the adventure, the treasure hunt and piracy in a single piece, some incredibly deep friendships were formed during the series.
Seeing Hancock's tragic background to be sold in slavery helps to remind spectators that these dangerous pirates are still human at the end of the day; Something that is easy to forget when you take a look at monsters such as Crocodrillo and Doflamingo. Amazon Lily also expands on the world building by introducing a kingdom that is occupied only by women, together to show the unique culture of Amazon Lily, which is chaired by Hancock herself.
6
Arco Loguetown
Smaker and Dragon first make their debut in the hometown of Gol D. Roger in the hometown
One piece is an incredibly long series and, consequently, it can be easy to forget many of the previous arches, especially because they were all very short to the Alabasta saga. Loguetown is an example of an early arch that is often overlooked, despite being based in the hometown of the Pirate King himself, goal D. Roger.
It is here that Fanti would meet two fundamentally important characters in history, Smaker and Dragon for the first time, together with Sea Stone to which we refer for the first time with Smaker's sword. This arch also includes a very symbolic moment in which Luffy puts his head on the execution platform in which Gol D. Roger was killed all those years ago, only for a lightning to miraculously save him when Buggy was going for the killing. Overall, Oda has enclosed a ton of intriguing characters and images in this arch of history largely underestimated.
5
Inverse mountains
Reverse Mountain creates some key characters with fascinating past lives
Crocus, the man who lives in the lighthouse on the reverse island, initially looks little more than an old grumpy geezer who does not enjoy anything but sit and look over the giant whale known as Laboon. In reality, Crocus was a member of the crew of none other than goal D. Roger, and although he does not have much time to tell fascinating stories of his past life, even being able to talk to him is a huge moment for straw hats.
Then there is Laboon, the huge whale that was scarred by the attempt to break through the mountain after being abandoned by his crew. The emotional history of Laboon, combined with the surprise revelation of Crocus, makes this an arc that is much more relevant than some can make, and one to which it is constantly recalled.
4
Drum island
Drum Island includes a fresh and unique aesthetic, together with one of the saddest background in the series
Returning to Little Garden, the island that straw hats arrive in front of the island of Drum, the crew realizes that their new goal would be to navigate towards Alabasta to prevent the harmful crocodile from taking control of the Kingdom of Vivi. Along the way, however, Nami suddenly gets sick, making them stop on the small battery island. Since this arch is essentially in the middle of the much more loved Alabasta saga, it makes it difficult for this part of the story, despite being so large in terms of quality.

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Pirates who do nothing! Something too much nefarious for pirate standards, that is.
While Wapol may not be the most interesting villain out there, Drum Island himself is a wonderful place that stands out from anything else seen in the series thanks to how it is always snowed. Of course, it is impossible to talk about Drum Island and not also mention the backper background, which is one of the most emotional of the entire series, which is certainly saying something.
3
Jaya
Barbanera makes its debut in an arc of apparently random but rather important history
Considering that BlackBereld is essentially set to be the main antagonist of the series, it would be easy to assume that the violent captain would have been introduced in some massive history span to leave the mark in the series. However, Oda instead has decided to leave him in Jaya's quite short, and not only is presented as a rather harmless pirate, but even keeps one of the best speeches in the story in which he speaks of how a person's dreams can never die.
Jaya is also the place where Luffy would show his new strength by eliminating the arrogant Bellamy with a single punch; Something that would become relevant later along the Dressrosa line. Jaya may not be so long, but considering how much the prolific bar becomes a character, it deserves more credit for having given man himself such a memorable introduction.
2
Zou
A short but extremely important arc full of traditions that can easily go under the radar
Most One piece The arches usually last almost 100 episodes and chapters, but since Zou is not even a quarter of that length, it has become a bit of a forgotten bow over the years. Furthermore, it does not help the fact that the bow is full between the whole cake and the Dressrosa, which are two huge parts in history which, initially, seem much more important than Zou.
The truth is, however, despite being so short, Zou contains a frankly stunning quantity of traditions. The revelation of Jack The Draught, a brand new Poneglyph and the Mink tribe are just a few things to get out of this arch, together with the new Pirate, Mink and Samurai alliance. This is also where the tragic background of Sanji would begin to take place, which is explored in depth even greater in the arch of the following history. While Zou could initially look simply a small pit stop, it is more than worthy of being classified as one of the great considering what fans offers.
1
Skypiea
The mission of straw hats to drop Enel is full of juicy traditions and intense fights
When you enter the series of One pieceIt is not uncommon to hear some fans say that Skypiea is an arch that is worth jumping for anyone who wants to recover quickly. Over time, that feeling has gained this arc the reputation of being a little unimportant, despite this to be far from the case. Skypiea is the place where straw hats come across a brand new Poneglyph, but it would also be the first time they meet an enemy who is using Haki, despite not being called this at that moment.
Skypiea also presents some incredible moments of character for straw hats, such as Sanji who settles life by taking an explosion of Thor da Enel, demonstrating his unshakable loyalty in maintaining the crew protected and safe. Even Robin could have fought in this arch, with his only significant individual battle for a long time until he faces himself against Black Maria in Wano. At the beginning it might seem not very important, but anyone who has had time to appreciate Skypiea will know how much a hidden gem really is.