Try Ichimonji, as above. Also the Sakai Hamono Museum, where you can also buy knives.
Oh they have some english speakers in the shop too.
Ichimonji mitsuhide is in osaka. Its pretty easy to find too. Very good hocho.
I really couldn't say. The inspiration for this blade came from here: http://www.kitchenknifeforums.com/sh...uction-testing!
Son, with all the weird karma you have in your life, I wouldn't be at all surprised if they come back to you someday!