Overview: With over 27% of the population currently aged 65 or over, Japan as a nation is experiencing unprecedented demand for assistive technology. Hideaki Tamada heads one Osaka-based firm that developed walking aids tailored to the smaller physiques of Japanese seniors. A runaway hit, the firm now leads the domestic "walker" market, helping older adults nationwide to maintain their independence. Follow a pioneering business prolonging healthy lifespans for Japan's graying society.