Watch Japan's Top Inventions Season 6 Online

The fascinating stories and secrets behind hit Japanese products, plus parts and machines that boast the top share of niche markets. In the first half: the story behind automatic ticket gates, developed by a Japanese company in the 1960s and installed at train stations throughout Japan. In the second half: tool setters that can accurately measure the length of drill bits for precision machining to within one thousandth of a millimeter.