I found this on a japanese fashion site, does this "count" as white clothes?

no, not enough white, too much other colors...

There is no need to dress up when you fly on the plane. Many Americans just wear shorts and a t-shirt. I have never seen people profiled for their clothes, and the only people I have seen get "taken aside" are those with passport issues...some were even wearing suits.

I have. I've been through immigration at Narita 4 times this year alone. I have had 2 friends detained by immigration, the last time was just a few months ago, and she was held for nearly 2 hours. My friends and I missed our train waiting for her, so we had to take the bus instead. Another person I know objected to the treatment and was denied a tourist visa. The only thing these three people had in common was a taste for "strange" clothing, though the last one had a nose ring as well.

Why was she detained for 2 hours? I mean, what did they talk about?

Gundams and Pokemon obviously...

They searched her bags (emptied them out, and checked the lining of her suitcase), and then the clothing she was wearing. And I'm sure they did an Interpol background check on her to see if she had any record for prior arrests. They didn't expect to find anything, they were just being the way they are to certain people. There is no rule against profiling in Japan, racial or otherwise.

Why did they profile her? No suit? ;)

Her hair was dyed black, she had a piercing in her nose. She was wearing a black concert t-shirt, jeans, and black leather bracelets.

I gotta say, immigration were super-silky-smooth. And in customs the guy didn't look at me twice. Really nice to eeze thru that part after so many hours on the plane :)