Quote from chineserider
I have read a lot of shoujo mangas where people transfer their phone numbers just by having their phones touch (sending signals I suppose). Does this actually happen a lot in Japan, and what about other places in the world?
It's called sekigaisen and it's a kind of infra-red thing. As is, it's horribly outdated- you could do the same thing much more easily with, say, bluetooth (though that raises some security concerns).
I'm fairly certain this is a Japan-unique thing, but maybe elsewhere in Asia?
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