Impressive collection of knives! Seki is a city in Japan known for quality production knives, like Solingen in Germany or Sheffield in England. Very hard, if not impossible, to know which plant made it as practically all Pacific Rim production is through factors. These agents, or brokers, get the knives produced and the marketing company here often doesn't even know who the factory is or where.

The U. S. A. marked knives are probably not made in the US. Knives are commonly marked with the seller's name and location and not necessarily that of the factory. Knives are supposed to be marked with country of origin but often aren't(or marked under scales and other places it can't be seen). The Chinese and Pakistani's are particularly bad about marking knives as US made that are not.

Again, impressive collection there...Bob