Since starting Nidec in 1973 in a tiny Kyoto shed with just three workers, Shigenobu Nagamori has built it into the world¡¯s top maker of precision motors and became one of Japan¡¯s most venerated business leaders.

Nagamori guided Nidec past Nissan and Panasonic in market value, and helped place its products in everything from cars to smartphones. But the 74-year-old now faces what may be his hardest task: passing on the reins.

Analysts say it will be particularly tough at Nidec, where employees and investors are enthralled by Nagamori¡¯s vision, outsized personality and brash confidence.