We took this photo of the train going by in Hiroshima and saw later that the girls on the train were flashing us a happy two fingered V sign.
We were very curious as to why younger Japanese people would flash the V sign that we in America consider either Victory as in Winston Churchill or V for Peace. I guess a lot of other people wondered too. I posed the question in Wikipedia and here's an explanation that sounded plausible.
"Japan and the V sign in Photographs
During the 1972 Winter Olympics in Sapporo, figure skater Janet Lynn stumbled into Japanese pop culture when she fell during a free-skate period—but continued to smile even as she sat on the ice. Though she placed only third in the actual competition, her cheerful diligence and indefatigability resonated with many Japanese viewers, making her an overnight celebrity in Japan. Afterwards, Lynn (a peace activist) was repeatedly seen flashing the V sign in the Japanese media. Though the V sign was known of in Japan prior to Lynn's use of it there (from the post-WWII Allied occupation of Japan), she is credited by some Japanese for having popularized its use in amateur photographs. According to the other theory (actually present in the Japanese version of this entry), the V sign was popularized by the actor and singer Jun Inoue, who showed it in the Conica photo camera commercial in 1972."
So now I know and now you know, too.