Yoshihiko Miyauchi, 82, may not be your average business leader.

As the former CEO of Orix Corp., he is credited with leading the leasing firm for nearly 34 years as it has grown into a financial conglomerate with a market value of about ¥2.5 trillion. Yet he is better known as an advocate of deregulation, which has earned him the nickname "Mr. Deregulation."

Miyauchi served for more than a decade as a member of a key reform panel advising the government on regulations in need of change, between the early 1990s and mid-2000s — an unusually long stint for a business figure.