- Miki founded and owns the majority of discount shoe store chain ABC-Mart.
- The chain has benefited from the influx of tourists into Japan, especially from China and Southeast Asia.
- ABC-Mart own U.S. shoe brand LaCrosse.
- A former amateur boxer, Miki founded ABC-Mart in the 1980s.
- He stepped down as chairman of the publicly-traded company in 2007.