Keiko graduated from a sports university and has a long working history as a personal trainer. She worked as a personal trainer in the private, public, corporate and medical sectors. She also holds a health and exercise instructor certification from the American College of Sports Medicine (ACSM).

As a mother, she specialises in prenatal and postpartum care for women, helping them stay healthy while pregnant and also helping them regain their ideal bodies after pregnancy. She is more knowledgeable about things unique to females, such as training and diet adjustments during different periods of the menstrual cycle.

She is also a Crossfit enthusiast, practicing since 2012 and has even competed in the Crossfit Asian Games.