No customization, I thought the same thing. Lucky for me I'm a big fan of narrow gyutos Most likely though it is just pictures distorting things like they always do.Congratulations, I remember how awesome it was to get notice from Dr. Naka that my Shige was ready. Dr. Naka's communication is #1!
P.S. Did you customize the order in any way? The reason I ask is because your knife does not look as tall as my Yoshikane, it looks more "high-speed."
Hide could answer this better than me, but my understanding is that the core is SKD 12 which is semi stainless. The knife is then clad in a soft stainless steel. You get some really cool looking patina on the hagane: http://www.kitchenknifeforums.com/showthread.php?1488-SKD12-PatinaAndrew, is that knife iron cladded?