Shipping is a valid point. Shipping from Koki is cheap and fast.
I have not purcased from Korin yet, but simply asking this question makes me respect you more and I will probably do business in the future.
I have shied away from Korin. My very first J-knife purchase was from them. My initial conversation with them made me feel like I was lucky to be buying a knife from them. I purchased the left-hand sharpened version of a Masamoto VG series 240mm gyuto. No one could explain what made it a left-handed knife and when it showed up it was sharpened for a right-handed person anyway. I decided that I had learned my lesson and that was what started me looking at the kitchen knife forums.
The famous birthday Doi mix up; however, to make up for it I got a picture of Mr. Doi and - seriously though - a 180 masanobu petty. The petty is probably about a $200 retail value, so I have forgiven you several times over. This was especially classy because I didn't make a fuss or ask for anything and it just showed up along with the big knife as a token of apology. Nice!
Everywhere you go, there you are.
I will do business with Korin again. Classy company and I had great service. Professional free knife sharpening on new purchases is a definite plus for those that want it.