The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. This time, a product used in over 20 countries and regions: stay-tight fasteners, nuts used with bolts in railroads, bridges, towers, and more. When normal nuts experience vibration, they sometimes come loose. But stay-tight fasteners, developed in Japan in 1974, overcame this problem. Learn the dramatic story behind the nuts, including a surprising spot that inspired their creation: a shrine!

The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. This time, pedal assist electric bicycles, which give you a helpful boost of power when you pedal and help you enjoy relaxed cycling even on steep hills. The first pedal assist electric bicycles were produced in 1993 in Japan, and these revolutionary inventions are now used and loved worldwide. We pedal into the little-known, behind-the-scenes story of how these bicycles were invented.