weiß jemand, warum 99% der japaner auf fotos das victory zeichen
machen? muss doch nen grund haben.

man du kommst auf fragen, aber mich hats auch nicht in ruhe gelassen und hier die erklärung die ich finden konnte:

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 3rd 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, she is credited by some Japanese for having popularized its use in amateur photographs.

Another possible origin stems from the post-WWII Allied occupation of Japan. As the gesture was popularized as meaning "for Victory" in the Pacific as well, American and Allied troops used the gesture often during the occupation. It is possible the Japanese later adopted the gesture into their postwar popular culture from this exposure, regardless of whether or not they understood the meaning behind its original use.

Through the 1970s and 1980s in Japan, the V sign was often accompanied by a vocalization: "piisu!" This gairaigo exclamation, which stood for "peace", has since fallen into disuse, though the V sign itself remains steadfastly popular.

Perhaps due to Japanese cultural influence, the V sign in photographs has become popular with young Koreans as well.

Quelle: wikipedia