To the west Blood Types are the classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). To Japan they are windows into the SOUL!!
Blood Type is that type of information that the normal world doesn't concern themselves with. Yet in Japan Blood Types are obsessed about to the point of exhaustion. As if these people didn't have enough to worry about with getting molested by tentacles or squashed under Godzilla's giant claw they have the added burden of having to think about "will people like me if I'm a B type?"
B - Blood types according to the BBC are the "Black sheep" of the blood types, "flamboyant free-thinkers, but selfish." While the alliteration (B-Boy, B-Blood) and seemingly bad boy image would make them sexy mother fuckers anywhere else in the world. In Japan, where free thinking is frowned upon and women want a man who slaves away at the office from 6AM-10PM, B bloods are up shit creek.
A - Blood types are listed by Fox News as Patient, uptight, sensitive, responsible, and cautious. Famous A Blood types are ominously listed as Adolf Hitler, Britney Spears, Ringo Starr, I mean who wouldn't want
to be part of this gang!
O - Blood types as in, "Oh my god! I struck the blood type lottery." Are called by the Telegraph as Trendsetting, passionate, vain, self-confident, loyal. These are the ones that are hunted down by the Japanese women like a vampire hunts sexy virgins.
AB - Blood types are the rarest of the four. They have Wikipedia saying AB's worst traits are "Critical, indecisive, forgetful, irresponsible." Now who's the bad boy B-Type!