Knife ID Help!!

Hello All,

My brother had surprised me bought me a knife in Japan a couple years back for Christmas. I wasn't expecting much considering he knows nothing of cooking or knives, and my god this knife became my baby. The feel in my hand, the durability, the edge, and feel. I use it every single day, no questions asked.
The only problem is that I know nothing of thew knife!
Anyone out there have any ideas as to who the maker of my knife is??
I uploaded a couple pics on flickr, and the links are below.

Thanks!!


https://www.flickr.com/photos/150770804@N04/33099970940/in/album-72157679117012842/


https://www.flickr.com/photos/150770804@N04/32669404153/in/album-72157679117012842/

Masamune.

That's the one alright!

Thanks S-Line!!