Ethnocentric?
That's a rather bizarre charge to fling. Whatever Japan's experience with breeders, the PRISM is a different animal. Its use of metal fuel makes it unique among fast reactors built elsewhere, and is a crucial factor in its safety, fuel cycle simplicity, etc. No need to be PC here. Metal fuel has tremendous advantages over oxide fuel, making the PRISM superior to other breeders--including Japan's. That's not ethnocentric, it's just the way it is.