Kotetsu The Kotetsu ( or ) , also known as Long , Koutetsu , and Koutetsu Knife , is a recurring weapon in the " Final Fantasy " series , usually of the katana class . Appearances . " Final Fantasy " . The Kotetsu is a sword equippable by the Thief and Red Mage classes and their upgrades . In the GBA and PSP / iOS remakes , it can be dropped from Cerberus in the Earthgift Shrine . It has an Attack Power of 22 . " Final Fantasy III " . The Kotetsu is a dark sword used by the Dark Knight class . Like all dark swords , it is effective against dividing enemies . It can be found in Bahamut ' s Lair , Cave of Shadows , and Falgabard . It provides a 105 boost to Attack . " Final Fantasy IV " . Kotetsu ( originally called Long ) is a weapon for Edge that has 45 Attack and 40 Accuracy . It is bought in Feymarch for 11 , 000 gil . This weapon is metallic . " Final Fantasy IV - Interlude - " . Kotetsu returns in the sequel of " Final Fantasy IV " . The katana can only be equipped by Edge and he comes initially equipped with it . It can be found in the Cave of Eblan . It has an attack power of 40 and a accuracy of 40 . The provides 40 Attack and Accuracy , and is found in Edge ' s Challenge Dungeon . It can be used by all ninjas . " Final Fantasy V " . The Kotetsu is a katana equippable by Samurai . It can be found in Castle Exdeath , and dropped from Numb Blade . It provides 55 Attack , 58 Accuracy , and has a 12 % chance for criticals . " Final Fantasy VI " . Cyan Garamonde can equip the Kotetsu , which may be bought in Narshe , Mobliz , and Nikeah for 800 gil . It has an attack power of 66 , and enables the Bushido and Runic commands . It is Cyan ' s second weakest weapon . Kotetsu is also one of the weapons thrown by the Outsider , which deals moderate non - elemental damage to one target . " Final Fantasy X " . Any of Auron ' s katana may become the Kotetsu if the Counter ability is its dominant ability . " Final Fantasy XI " . The Kotetsu appears as a generic low - level great katana usable by Samurai . " Final Fantasy XII " . The Kotetsu is the cheapest and weakest katana with an Attack power of 50 , and requires the Katana 1 license to equip . It can be bought in Rabanastre and Jahara for 3 , 800 gil , and dropped from Werewolves ( very rare ) . All katana have 2 . 39s charge , and 1 . 2s action time , making them average when it comes to attacking speed . In the " International Zodiac Job System " version , only the Samurai class may equip the Kotetsu . " Final Fantasy XV " . Kotetsu is a primary arm for Cor Leonis . " Final Fantasy Tactics " . The Kotetsu ( Koutetsu Knife in the PlayStation version ) has an attack power of 8 , it can be bought from the outfitters for 3 , 000 gil from Chapter 2 and onwards . The katana ' s Iaido ability is called Binding Darkness , which deals non - elemental magick damage . " Final Fantasy Tactics Advance " . The Kotetsu is used by Assassins and Ninja . The Assassin can learn one of its best skills , Rockseal , from this katana . It has an Attack power of 37 and can be bought for 8 , 000 gil from Cyril and 9 , 000 gil everywhere else . The can be equipped by Assassin and Ninja , the new Parivir job . It teaches Skyfury Blade to Parivirs for 300 AP , Wood Veil to Ninjas for 200 AP and Rockseal to Assassins for 450 AP . It provides + 34 Attack and + 5 Defense , and can be bought for 4 , 800 gil in the shop after creating it in the Bazaar after using a Body Ceffyl , Moon Ring , and Goldcap . " Final Fantasy Type - 0 " . The Kotetsu is a weapon for Jack . It provides 26 Attack Power and is bought from Bazz for 6500 gil . The Kotetsu is a Clavat - only weapon that provides + 130 Attack . It can be made using the Noble ' s Weapon scroll . Kotetsu is a mid - ranked sword that can be used by any race . It provides 93 attack at level 1 and 150 attack at level 30 , + 5 to Stun , and has one empty slot . It can be created for 790 gil by using Steel x5 and Black Gold x3 ( Hard or Very Hard mode ) . When turned into a jewel , a level 3 - 9 Kotetsu will make an Assassinite , level 10 - 19 makes a Fortune Fluorite , and level 20 - 30 makes Big Charjade . " Dissidia 012 Final Fantasy " . The Kotetsu is Gilgamesh ' s level 90 exclusive weapon . It provides + 63 Attack , + 34 Bravery , - 1 Defense , and EX Force Absorption + 5 % . It can be traded for 158 , 000 gil , an Osafune , an Electrum , and Giant ' s Dream x5 . " Final Fantasy All the Bravest " . Kotetsu grants + 2 to Attack . It can be equipped by Samurai , Ninja , and Auron .