Where can I find a good website to compare American technology with Japanese technology?

I don’t know, but I do know that Japanese technology is a lot cooler than amarican technology.

This is a very vague question. What kind of technology? Giant robots? Cars? Electronics? A great site for electronic and computer equipment is newegg.com. It has a lot of goods listed and an extensive user base that rates the products. You just have to know what companies are from the US and what are from Japan.