There are only four Katanas in Dark Souls. All have a constant Bleed of 300. They can be a very good, light, fast weapon for the first and possibly even second play through.

Weapon / Requires Attributes (base) Found / Notes
Chaos Blade Chaos Blade
16 Str, 14 Dex
133 (Phys)
Bonus: B (Dex)
Made from any other +10 Katana and the Soul of Quelaag by the Giant Blacksmith. Bonus damage scales with Humanity (up to 10). Inflicts damage to the player on hit.
Iaito Iaito
14 Str, 20 Dex
88 (Phys)
Bonus: B (Dex)
Found in Blighttown near the upper level Bonfire. You need to jump to it.
Uchigatana Uchigatana
14 Str, 14 Dex
90 (Phys)
Bonus: B (Dex)
Kill the Undead Male Merchant in Undead Burg or purchase from Shiva of the East for 5,000 Souls
Washing Pole Washing Pole
20 Str, 16 Dex
90 (Phys)
Bonus: D (Str), D (Dex)
Purchase from Shiva of the East for 20,000 Souls in Blighttown, must be a member of the Forest Hunter Covenant.
Categories:  Weapons  Katanas