I have a couple of these Seki Ryu knives, a Santoku and a Deba, I purchased from some local Japanese stores. I've never seen them anywhere else though and can't find anything on them on bladeforums. I'm wondering if anyone has any info, reviews, experience, etc. with these Seki Ryu knives. So far, they seem decent. Hold an edge decently well and easy to sharpen. Here is one of few links I could find on them (but not in english):
http://www.sushi-shop.pl/product_reviews_info.php?products_id=95&reviews_id=36

http://www.sushi-shop.pl/product_reviews_info.php?products_id=95&reviews_id=36