Originally Posted by Ballenxj

My suggestion? Get a front or rear bike rack that also attaches down low on the fork or stay with attachment points for panniers. Next, get one of those tactical shotgun scabbard and attach it to the points where the pannier normally would.
Last, simply slide the sword with scabbard in from the top. Easy.
Those scabbards usually come in Black, Olive Drab, Coyote, or Multi cam.