Originally Posted by Vivisteiner
To get rusty sword. Go to calm lands. Over bridge where u fought defender X, then go down that hill thing. When near Yojimbos cave, just walk right, away from his cave. Eventually, ull reach a dead end, and there is a stone thing. Press X and ull get the rusty sword.
Once u get the sword walk to Mi'ihen, and try and sneak past the Magus Sisters, which took me a while to do. Just try walking round th edges. Walk on, and somewhere on the left there'll be an entrance (I think the 2nd turning). Go through it and up some elevator thing and insert the rusty sword to get Masamune.