Oops sorry mistake of that katana thing But yeah its sweet Throwing daggers !!!!
There'll probably be at least one katana-looking weapon, rest assured. After all, your mentor is a blade, and the traditional blade weapon is the akavir katana. Steal his! lol.
Ninja fans, Stealth fans, be at ease. Skyrim has:
-Stealth kills! like the throat slit from the trailer.
-perks like this one (confirmed): silences your footsteps
-a Dragon Shout, uttered in a whisper, that teleports you silently in the blink of an eye.
This game is going to be so epic, for all three archeotypes of playstyle.