Japanese culture utilizes a system called ketsueki-gata, which assigns specific personality traits and romantic compatibilities based on an individual's ABO blood type rather than their astrological birth month.

A closer look

Japanese culture utilizes a system called ketsueki-gata, which assigns specific personality traits and romantic compatibilities based on an individual's ABO blood type rather than their astrological birth month. First popularized in the 1920s and revived in the 1970s, this pseudoscience dictates that Type A people are organized perfectionists while Type B people are selfish creatives, leading to actual workplace discrimination known as blood-type harassment. It is fascinating to realize that while Westerners arbitrarily judge each other based on giant spheres of burning gas millions of lightyears away, the Japanese have streamlined the process of baseless prejudice down to the literal fluid pumping through their own veins