I showed my photo to my son (age 12, mixed race English and Japanese) without asking him any leading questions and he thought you were American. Did you look Asian? After a bit of thinking he said 'chotto ne' (a bit). I think some combinations of facial features may make people appear as if they have some genes that they don't actually have.
According to my mother, my grandfather spent a lot of time in Japanese ports before the war (he was a seaman) and was very taken with Japanese women. When he returned to Britain, he ended up marrying my grandmother, who happened to be petite, have dark hair and more pointed eyes than the average woman from Essex despite having no Asian blood in the family in the previous few generations. What I'm saying is that I don't make any conclusions about having a slightly Asian appearance. Also, Japanese people can sometimes say odd things about appearances, I've been told that I look like Harry Potter and I definitely don't!