[Tin Man]

i though Marasamune was the mix of the 2 legendary Japanese swords one being Masamune the other being Marasama.

The masamune sword was made by Masamune he had an aprentice who was Marasma who became currupt and took the knowledge his master gave to him and created a sword that was shorter and thiner than the Masamune sword which would be the Marasama sword.

its said if you put the Masamune blade into a stream the blade being good would ward of passing lilies (cant spell) to save them from its sharp blade but the Marasama sword being evil would lure the lilies and cut them.

-edited part-
Marasama became currupt by selling his swords i think.