Warning Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled.

«Vertical Square» (バーチカル・スクエア, Bāchikaru Sukuea?) is a 4-hit Combo One-Handed Sword category Sword Skill in Sword Art Online, New ALfheim Online and Project Alicization.


«Vertical Square» is activated with a powerful stamp. The first strike of this Sword Skill is a vertical slash without a backward motion, similar to the 1-hit «Vertical». This slash is followed by a left to right swing from below and then a vertical slash down. Finally, the skill is concluded with a full-power overhead slash (uppercut)[1]. Similarly to the «Horizontal Square», a square is drawn with the 4 hits of this skill and continues to spin as it dissipates[2].


Instance Description
Light Novel Anime Manga
Volume 1 Chapter 9 Episode 8 A Demonic Servant used this skill against Asuna, but missed every single hit.
Volume 1 Chapter 9 Episode 8 Kirito attacked the Demonic Servant with this skill after it was temporarily stunned by blocking Asuna's last Star Splash hit.
Volume 5 Chapter 6 SII Episode 04 Kirito performed the skill without the system assistance when he tried out his newly-bought Kagemitsu G4.
Volume 8, Calibur Part 3 N/A Vertical Square was one of the Sword Skills that Kirito chained while fighting against the Golden Minotaurus
Volume 7, Chapter 6 SII Episode 20 Yuuki used this skill against a Gnome player who was blocking the way to the 27th Floor Labyrinth's boss room. The Gnome was blown several meters away and his Hit Points dropped to the red zone after he was hit with this skill.
Volume 10, Chapter 4, Part 4 Kirito performed this Sword Skill while testing out the capabilities of his new sword.
Volume 10, Chapter 4, Part 5 Kirito used this Sword Skill to counter Uolo Levanteinn's Avalanche.
Volume 14, Chapter 13, Part 5 Quinella used the skill against Kirito, though Kirito managed to dodge or block three of the hits and was only slightly cut on the left side of his chest with the third hit.


  • Vertical Square is one of Kirito's favourite Sword Skills.
  • The first season of the anime portrays Vertical Square as more of a diagonal or even horizontal square, despite it having "vertical" in its name.
  • In the anime adaptation of Calibur, Kirito used Horizontal Square instead of Vertical Square.[3]
  • A modified version of «Vertical Square» was included in the updated version of «Dengeki Bunko Fighting Climax», known as «Dengeki Bunko Fighting Climax Ignition», as a special move used by Konno Yuuki.[citation needed]


  1. Volume 10 Chapter 4 Part 5
  2. Volume 1 Chapter 9
  3. Tweet by the author.


Skills and Magic
Default Sword Skills
mostly common in SAO, New ALO, UW
Avalanche - Cyclone - Embracer - Explode Arrow[1] - Fell Crescent - Horizontal - Horizontal Arc - Horizontal Square - Howling Octave[2] - Lightning Fall - Linear - Meteor Break - Meteor Fall - Rage Spike - Reaver - Savage Fulcrum - Senda - Sharp Nail - Single Shot - Slant - Snake Bite - Sonic Leap - Spinning Shield - Star Splash[2] - Starburst Stream[3] - Treble Scythe - Tsumujiguruma - Tsujikaze - Vertical - Vertical Arc - Vertical Square - Vorpal Strike - Whirlwind
SAO Dual Blades - Extra Skills - Fishing - Hiding - Holy Sword - Searching - Tailoring - Tracking - Unique Skills
ALO Original Sword Skill(Mother's Rosario (OSS))
Magic Butterfly Shield - Cold resistance spell - Concealment - Earth Wall - Fireball - Fire Spear - Hit Point Buff Magic - Healing Magic - Hollow Body - Metamorphosis - Moonlight Mirror - Night Vision - Purified Surface - Sacrifice - Smokescreen - Strength Buff Magic - Vacuum Blades - Water Breathing - Wind Blades - Wind Needles
Project Alicization Sacred Arts - Incarnation - Synthesis Ritual
  1. Only in ALO.
  2. 2.0 2.1 Only in SAO and ALO
  3. Only in SAO

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