The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. On this episode, electronic bidet toilets, which clean your bottom with a spray of warm water. On sale since 1980, some 40 million of these toilet seats have shipped, and are now sold in many countries and regions including the U.S. and China. But the creation of this high-tech, revolutionary product was anything but easy. This time, the dramatic tale behind electronic bidet toilets.

The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. This time, a product first produced in Japan in 1958: instant ramen. With over 100 billion servings eaten every year, this instant meal has become a worldwide staple. The inspiration for this invention came from a surprising source: the deep-fried Japanese dish known as tempura. This time, we bite into the story behind instant ramen, a food loved around the world.