Due to the huge amount of crappy wall-hanger makers of Katanas, I don't even look twice at them anymore. I do have a set of snakeskin-covered samurai wall-hangers, but I know better than to try to use them. All mine do is gather dust.
A Korean Hankook may be a better option...not many wallhangers with those.
Far better to get Chinese Jian or Dao swords...at least you know what you are dealing with
Honestly, the exotic weapons are WAY more fun...the Twin hooks, 9-section chain, 3-section staff are really too much fun
And as was seen on "The Deadliest Warrior" those Twin Tigerhead Hooks are DEVASTATING
Not to mention perfect for zombie dismemberment...