2 Sword Style (also referred to as Nitōryū or simply shortened to "2SS") is a Fighting Style that consists of techniques unleashed by two blades. It is taught by Musashi, a master swordsman who can be found on Sashi Island.
2 Sword Style's main source of damage scaling is the Sword Mastery stat, which it uses for both skill and M1 damage. In addition to this, the base damage of the user's M1s can be boosted by equipping at least two Sword Style-compatible swords, which can be done using a special GUI present in the user's inventory for as long as they use the fighting style.
Do note that using 2 Sword Style will lock the player out of using a Sword and vice versa.
Obtainment
Further information: Musashi, Sashi Island, Book of Nitoryu
Musashi will offer to spar with players who have fully unlocked 1 Sword Style for a nominal fee of 
10000. Defeating him will award a Book of Nitoryu, a consumable item that can be used to obtain 2 Sword Style skills. The first use of the Book of Nitoryu will grant 2 Sword Style and the skill 72 Caliber Phoenix, with each successive use granting a new skill. Uses of the Book cap out at 5, after which the player is unable to obtain any more books and is permanently locked out of Musashi's boss fight.
Moveset
Showcase
Pros
- Raging Whirl is an amazing combo extender.
- Excellent combo potential.
- Two block breakers.
- Consistent stamina usage on skills.
- 72 Caliber Phoenix and Nitoryu Strike goes through Logia intangibility without the use of Busoshoku Haki.
- Much higher scaling than 1ss.
- 2ss scaling cannot be increased by using higher scaling katanas, meaning you can rock 2 crappy katanas and still do the same damage as you'd do with 2 Iceborn Katanas, Shusui or Musashi's katanas.
- Rashomon Draw and Nitoryu Strike have good range.
- Rashomon Draw is a combo extender.
- You can use absolutely any swords m1 damage will not be more, when using special swords will open additional abilities. example(Shusui)
Cons
- Tower Climb has a very short amount of stun making you unable to follow up with an m1 combo after it is triggered
- 72 Caliber Phoenix has horrible endlag making the opponent able to punish you if you land it at mid-close range due to the low stun duration
- Harder to combo with than 1ss.
Tips & Tricks
- Unequipping 2SS while using Nitoryu Strike on a Logia-type Devil Fruit user will trigger the intangibility and allow the aggressor to switch back and combo extend.
- If you hold Nitoryu Strike for about 10 seconds, it'll automatically use the attack.
- You can extend with Nitoryu Strike by looking up at the enemy and using Ito X straight after which is true.
Gallery
Trivia
- Rashomon Draw's execution cutscene deals damage equivalent to the target's max health.
- Using Busoshoku V2 with 2 Sword Style will cause the player's attacks to take on the hue of their spirit colour.
- If the player has Busoshoku V1, their attacks will be purple by default.
- 2SS was animated by DahNoob.
- Its showcase was released on June 18th, 2021. It was added to the game in Update 4.
- It's recently got a buff that increased it's M1 scaling, making 2ss a viable option again. (70 m1 with 1140 sword and Mihawk's hat)