From the Editor
  • Brothers Naoki and Takashi Tada draw their fortune from publicly traded discount drugstore chain Sundrug.
  • They inherited their stake from their late father, Yukimasa Tada, who died in 2001.
  • Naoki is chairman and Takashi sits on the board of Sundrug,
  • The siblings also run much smaller firm Forest, which operates shopping malls near Tokyo.
Wealth History
HOVER TO REVEAL NET WORTH BY YEAR
Personal Stats
Source of Wealth
Drugstores
Residence
Tokyo, Japan
Citizenship
Japan
Related People & Companies
Masateru Uno & family
Masateru Uno & family
Related by origin of wealth: Drugstores
View Profile
Stefano Pessina
Stefano Pessina
Related by origin of wealth: Drugstores
View Profile
Japan
Japan
Citizen of Japan
View Profile
Dirk Rossmann & family
Dirk Rossmann & family
Related by origin of wealth: Drugstores
View Profile
Jean Coutu & family
Jean Coutu & family
Related by origin of wealth: Drugstores
View Profile
Kevin David Lehmann
Kevin David Lehmann
Related by origin of wealth: Drugstores
View Profile

More on Forbes

Sep 23, 2025

Raising Cane's: The Origin Story Of This $22 Billion Empire

In his early 20s, Todd Graves, dismissed by banks as a naive kid with a bad idea, turned his fanatic vision for chicken fingers into Raising Cane's. Now, Graves is worth $22 billion, and with over 900 locations, Raising Cane’s is one of America's fastest-growing fast-food chains.