This might be old news but these weapons rival Daedric swords in damage once upgraded. They're available early in the game and are cheap as dirt to upgrade throughout your adventures. Honeslty I prefer their lower weight over heftier weapons or weapons I need 5 perks to gain access to.
Easiest way to get one is to murder the 2 that give you the quest in Whiterun once they leave city limits so there will be no witnesses. You can also come across a random event around Rorikstead where 2 Alik'r are harassing a Redguard woman.
Katana's are not out of place since Katana's are the weapon of the Akavari and the Akavari invaded Tamriel through dun dun dun... Skyrim.
Delphine's basement has a Blades sword, and Sky Ruler Temple has about 8 of them and a named one that does bonus damage to dragons.
The clouds pass... the rain does its work and all individual beings flow into their forms." The Book of Changes
aeatyes posted... pandabosch posted... ...or weapons I need 5 perks to gain access to.
There are no perk restricted weapons.
On my level 56 I've run across 1. A daedric dagger which is good since I'm a sneaker but it just doesn't cut it. On my heavy armor character I can make all of them whenever I want and he's level 20 or something.