It’s widely known in Japan that idol singers are often contractually prohibited from engaging in romantic relationships. The reasoning goes that if word gets out that an idol singer has a boyfriend, her fans will feel betrayed that she isn’t solely devoted to her role as a musician and entertainer, and thus stop buying her CDs (there’s also the unspoken implication that openly dating someone will destroy the fantasies of individual fans that would like to date the singer themselves).
A signed contract isn’t always enough to keep young love and hormones in check, though. And when you consider that idols are almost always attractive, outgoing young women, it seems like it should be only a matter of time until they find a guy they fancy out of their swarms of would-be suitors. That’s why in addition to legal pledges not to date, the Japanese entertainment industry has a number of sneaky tactics up its sleeve to prevent its idols from falling in love or going on a single date.