What's the difference between SDC/1GBKR (Japan) and SDC/1G (Japan)?
Nothing that I can tell, other than the UPC is different. The cards always say SDC/1GB on them.
I have a SDC/1GBKR which was Japan, and I have one that is SDC/1GB that is Japan. It has the same UPC as my Taiwan card that I exchanged with Kingston to get the better Japan card.
I have no idea why they have the different UPCs and different cards, yet they are all interchangable from their point of view. It is a terrible disservice to the consumer, as there are 2 completely different items sold under the same name, and you have no idea what you are getting when you order.