Only in Japan: Ingenious Inventions that Defy Imagination

9. Intelligent Bra

What it is: a bra that will only unlock in the presence of "true love." Not for Sale (yet) Average Price: Invented in 2014 This sophisticated smart bra will only release its hook for non-wearers when "true love" is involved. However, how? Because the Japanese undergarments from Ravijour include sensors inside that detect the wearer's heart rate. Your Android or Apple iPhone app receives the data from the sensors when it is linked, and it uses this information to assess whether the heart rate suggests "true love."

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@Dana Van Patten Smart Bra/PPinterest The bra will unclasp when your heart rate is increased by your autonomic nerve, which is influenced by catecholamine secreted by your adrenal medulla. This device, which Ravijour has not yet released for sale, is called the "True Love Tester."

10. A fan without blades

What it is: a fan without any sound or blades Created in 1981 * Average Cost: $378.13 When Dyson released its bladeless fan in 2009, customers were taken aback. The Telegraph then noted that, once more, Japan had advanced a few years ahead of us, having created the Dyson bladeless fan as early as 1981. Many imitation companies hopped on the bandwagon once Dyson re-released the fans.

Unbladed Fan @New Organ/PPinterest Nevertheless, it appears that this useful fan—which looks futuristic enough to have originated from iRobot—was really invented in Japan earlier. A brushless electric motor powers these fans, directing airflow through the device's circular hoop.