I see the words "sword skills" gets thrown around in One Piece community and we all know its because of the age old debate of Shanks vs Mihawk. Trollda himself fuels such debates by mentioning "sword skill" in Mihawk's bounty poster. I have been thinking a while the meaning of "sword skill" in One Piece context and came to the conclusion that sword skills doesnt really exist in One Piece, its a myth.
The lack of depth in sword styles in One Piece
In order to discuss sword skills, it is important to consider sword styles first. Lets take the gold standard of sword mangas Rurouni Kenshin for example (If you havent read it yet, start now!). Some of the well known sword styles from Rurouni Kenshin are =>
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Hiten Mitsurigi style: Kenshin's style, a fast-paced style that focuses on agility and speed
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Kamiya Kasshin style: Kaoru's style, thats focused on defense and counters
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Gatotsu: Sword style of the GOAT Hajime Saito, a style that emphasizes speed and precision in order to kill opponents quickly
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Kodachi style: Aoshi's style that use a short sword to create impregnable defense and then attack with martial arts
It is clear that Noburo Watsuki, the creator of Rurouni Kenshin, gave careful consideration to the sword styles portrayed in the manga. These styles are well-defined and tailored to suit the personalities, physical abilities, and weaponry of their respective users. Now lets think about some of the prominent sword styles we got in One Piece =>
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Two sword style: Oden
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Three sword style: Zoro
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Four sword style: Kaku
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Six sword style: Hatchan
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Eight sword style: Hyouzou
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Nine sword style: Asura Kyutoryu
One could argue that Oda is simply adding a new sword and calling it a new style in One Piece, without much thought put into it. Its either Oda was being lazy with the styles or he simply didnt care much. What if sword styles, as well as sword skills, doesnt really matter for a top tier swordsmen? That would explain why sword styles lacking in depth and careful consideration.
There is only one skill exclusive to the "pure" swordsmen
The majority of techniques used by One Piece swordsmen are rooting in various forms of cutting or slashing. Its quite possible that individuals like Roger or Shanks could perform this maneuvers given their strength, skill or agility.
As far as I am concerned, there is only one skill thats exclusive to the so called "pure" swordsmen: the flying slash. This technique was introduced during Skypea when Zoro fought Braham. We have also seen Zoro imbuing haki with a flying slash against Monet. Flying slash is something that probably requires a certain level of skill and I dont see Shanks/Roger replicating it without any practice. However, the haki emission strikes (e.g. kamusari) from Roger/Shanks have a similar function. Is flying slash truly necessary for a swordsman who has haki emission strikes in his arsenal?
Another technique that could potentially be exclusive to "pure" swordsmen is the "iai" technique, which involves drawing the sword quickly and striking in one fluid motion. Zoro has used this technique with his Shishi Sonson attack. However, going forward, I dont see any scenario where a fast draw would impact the outcome of a fight.
The use of Juken - Gentle blade
Perhaps you are thinking, "Well Nidai, we have seen how crucial sword skills can be all the way back in chapter 51" =>
Zoro:
It was DEFLECTED. No matter times you shoot him, the outcome will be the same.
He changed the trajectory of the bullet with the tip of his sword.
Pirate:
...who the hell are you?!
Zoro:
I've never seen such a graceful sword.
Mihawk:
There is no strength in a sword without softness.
Zoro:
And you split this ship with that sword as well?
Mihawk:
Indeed.
Zoro admired it as if using gentle blade alone made Mihawk the WSS. Unfortunately, Tashigi replicated this feat:
No disrespect to Tashigi, but if she can replicate one of the greatest sword skills, perhaps sword skills dont amount much for the top fighters in the verse. Its like she maxed out her sword skills and its not enough to push her beyond the captain rank in the marines.
The Pinnacle of Swordsmanship: The Ability to Cut Nothing
There's been many theories floating around regarding how Zoro will beat Shiryu. Long story short, the theory says Zoro will learn to cut
nothing to beat Shiryu. Cutting
nothing was first mentioned by Kyoshiro =>
Whats relevant and important for this thread is, Kyoshiro regarded "cutting
nothing" as the pinnacle of swordsmanship =>
I had high hopes this would be some special sword skill thats unique to the "pure" swordsmen, the people who live by and die by their swords. I was expecting some sort of ultra instinct awakening or some other badass shit unique to sword masters. However, my excitement was dashed when Oda revealed "
cutting nothing" is heavily reliant on haki abilities =>
Only Haki is real
1. The first thing (the only thing?) Mihawk taught Zoro is haki =>
2. While teaching his swordstyle to his disciples, the first thing Oden mentions is ryou =>
3. A master swordsman can use his haki to cut everything or cut nothing (see the Hyogoro panel above)
We saw during Zoro vs King fight that all the techniques in the world wasnt enough, but once Zoro unleashed CoC, it was over.
TLDR
Haki is everything for a swordsman, sword skill means squat
Some tags (who I think might be interested):