The V peace sign, or piisu sain. It's almost mandatory for photos in Japan — the fingers jump up, sometimes both hands, and out spreads the V sign.
But why? No one seems sure. There are, however, some clues and theories, littered throughout history, possibly taking us as far back as medieval Europe. Let's have a look:
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.