The Japanese are obsessed with perfection…
An American man gave proof of this via this story, which involves American computer giant IBM.

IBM sent a trial order for a computer component to a Japanese manufacturer. They specified that they will only accept 3 defective pieces per 10,000.

The Japanese manufacturer got worried reading this. On the exact date of delivery, the parts reached IBM, with a handwritten note.
After the initial exchange of pleasantries, the Japanese manufacturer talked about the defective parts. e mentioned that the three defective parts per 10,000 were separately manufactured and packaged. With clear instructions on the package warning that they were defective parts, and were not for use.

This incident proves how much Japanese value perfection.