Could there be a more emblematic souvenir from Japan? This went viral on Twitter: a sarariman keshigomu (サラリーマン 消しゴム) that depicts the plight of the sararis. The harder you rub, the balder they get.
I hate how it slowly seems to recede from the front. So far mine only moves back about 1/2 inch a year ,but everytime I look in the mirror I forsee my future , LOL.