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"no-no girls" who go out with no pantsu and no bra are on the rise
in recent years, scientific research concluding that tissue which supports the breasts doesn't develop when one wears a bra, leading to sagging, has come to light. in addition to that, the influence of foreign artists and the desire to reduce the amount of laundry has led to an increase in "no no ladies," women who go out with no bra and no pantsu. 100 office ladies in their 20s were given a "no-no survey." When asked if they had ever gone out without wearing a bra that summer, 94 out of 100 answered that they had. When asked if they had ever gone out without wearing pantsu that summer, 12 answered that they had. If this no-no girls trend continues increasing, experts say that in ten years 90% of young ladies will be going out without any underwear (summarized from the following url http://wpb.shueisha.co.jp/2013/09/07/21657/)