On my commute to work in London I often see Japanese people. That's all well and good but sometimes they notice me, too. Why? Because I might be browsing a free Japanese newspaper or attempting to read a Japanese book.
Japanese books are easy to spot because of the paper covers that Japanese book shops put on top of the original covers. Also, novels tend to be smaller than typical English equivalents. See if you can spot them on the Tube.
For fear of stereotyping, a tell-tale sign of a Japanese woman out and about is Louis Vuitton. Why Louis Vuitton bags are so popular with Japanese women, I will never know.
Today, just as I was about to get a Japanese tennis magazine out of my bag, a man sat down next to me. I didn't see his face, but something told me he was Japanese. Was it his suit? Perhaps. Ah, his man bag satchel! A quick glance and what do you know, he was reading a Japanese book.
There are other signs of course I tend to go by: clothes and hairstyles. Of course, if you know a bit of the lingo, a couple of Japanese friends will be obvious as soon as they speak. That reminds me...
The other day I was having a conversation in Japanese with a friend in a pub. A girl sat down at the table next to us and she seemed to keep looking in our direction (not that unusual, I grant you!). It wasn't until her friend arrived and they started speaking Japanese that I realised she'd been listening to our entire conversation. With non-native Japanese, I felt violated!