“But I continue to work hard to create good businesses.” Shunsaku Sagami, 33, owes his fortune—Forbes recently estimated his net worth to be $1.9 billion—specifically to the business of ...

Shunsaku Sagami, founder and CEO of Tokyo-listed M&A Research Institute, leveraged AI to give his M&A business a competitive edge. Now the 33-year-old is looking to replicate the success abroad.