Seven Secret Swords

Prior to the beginning of the series, Ikki Kurogane created seven original secret sword techniques (秘剣 hiken) that he revealed throughout the battles. He also created a final secret sword technique (終の秘剣 tsui no hiken).

Techniques
It has been shown that Ikki can combine some of these techniques together into one attack. One example is that he can use Rekkou that is powered with the effect of Dokuga-no-tachi.
 * 1) Saigeki (犀撃, lit. Rhinoceros Strike) A charging attack in which Ikki uses his superhuman body control to focus the power of vector in his body to a single point, and was considered an anti-materiel sword technique. Although at first Ittou Shura is needed in order to use this technique, Ikki after learning Edelweiss' sword technique is able to use Saigeki without entering Ittou Shura.
 * 2) Rekkou (裂甲, lit. Rend Armor): Ikki uses this technique with the same philosophy as One-Inch Punch to make an explosive point-blank slash.
 * 3) Madoka (円, lit. Circle): Ikki receives an attack, but instead of redirecting the force behind him, he makes a circular motion and redirects the force back to the attacker. The technique is especially effective against opponents with strong attacks. During the final match of the Seven Stars Sword Art Festival against Stella, Ikki evolves it mid-match, using the broad back muscle (latissimus dorsi) to transfer the force into his next strike. Stella notes that in order for this to happen, his muscles had to be as loose as jelly, even looser than normal. Even a moment of stiffness would cause his muscles to explode from the force being redirected.
 * 4) Shinkirou (蜃気狼, lit. Mirage Wolf): Using radical footwork, Ikki creates an afterimage before himself while running to confuse the distance between him and his opponent.
 * 5) Kuruizakura (狂い桜, lit. Off-Season Sakura): An attack with a delayed effect using slashes with certain force and mechanisms to create wounds that won’t open until later on.
 * 6) Dokuga-no-tachi (毒蛾ノ太刀, lit. Poisonous Moth's Long Sword): While sending out a sword slash, by consecutively contracting the muscles, a shockwave is emitted in that interval which is transmitted through the opponent’s weapon and into them. It’s able to pass through armor and into the opponent’s interior if the opponent is holding a sword in their hand, the arm that has been made numb will be forced to drop the weapon.
 * 7) Raikou (雷光, lit. Lightning): The fastest of Ikki's own original sword technique. It is a slash swung in a speed that exceeds a human's dynamic vision by far making it look as if it was an invisible slash. Initially it required Ittou Shura but after learning Edelweiss' sword technique, Ikki's reflexes and speed are fast enough to able to use this without using Ittou Shura.

He can also combine his original sword technique with another technique outside his original ones. He is able to use Kyokujitsu Isshin-ryuu style's Amatsukaze at Raikou's speed, which is a new technique called Amatsu Raikou.

The Final Secret Sword（終の秘剣）
Oikage (追影, lit. Seeking Shadow): A technique Ikki developed in order to defeat Stella at the end of their duel in the final match in the Seven Star festival. After breaking the chains of fate binding him, Ikki put all that extra magical energy into Ittou Rasetsu, and chose the fastest maneuver he knew of: "Quick-draw". This technique is so fast that Stella was able to see an anomaly, as Ikki's shadow couldn't catch up to his movements.