It doesn't need to have a Japanese face guys. I'm looking moreso for the clothing than the face. Anyways, a lot of Japanese fashion centers around crazy makeup, dark/pale tans, and anything that doesn't really show them being Japanese so whatever fashion you choose it would not really matter.
Harajuku: Harajuku fashion - Google Image Search
Gyaru(Includes Kogal, Ganguro, etc etc): Gyaru GAL Styles - Japan Guide - Japan Linked
Lolita: Lolita fashion: Information and Much More from Answers.com
There are more and many different subcultures within those streams, but I think you get my point