Shigenobu Nagamori plans to lead Nidec Corp. until he hits his latest financial target, a 10-fold increase in revenue he expects by 2030. He¡¯ll be 85 then.

One of Japan¡¯s rare mergers and acquisitions specialists, Nagamori became a billionaire by cobbling together 41 companies to form the world¡¯s biggest maker of precision motors used in hard disk drives, among myriad other products. Visitors to Nidec¡¯s headquarters in Kyoto can see the wooden shed, preserved in the lobby, where Nagamori started the company next to his mother¡¯s farmhouse in 1973.

¡°I¡¯m joking when I say I¡¯ll keep going until I¡¯m 120, but I plan to keep doing it at least until we hit the target,¡± the 70-year-old said in an interview, dressed in a dark suit and his trademark DayGlo green necktie.