This vintage poster was made for the Tokyo Subway system some time ago as a way of reminding passengers to not forget their belongings on the train. Some very interesting artwork of Astro returning Osamu Tezuka's umbrella and distinctive hat. It's a creative and funny way to get a point across, though it's pretty unlikely that Tezuka would ever forget his hat, as he was seldom seen without it.
Check out more Japanese posters made to promote subway manners at Pink Tentacle, featuring Superman, Santa Claus, Doraemon, John Wayne, and more. It's some crazy stuff!
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