Keiichi Sato competes in two sports: para-triathlon and para-Nordic skiing.  The first sport he did was para-Nordic skiing.  As a member of Team Japan, he went to the 2010 and 2014 Winter Paralympics.  After para-triathlon became a Paralympic sport, Sato decided to try it.  He then was part of Team Japan at the 2016 Summer Paralympics. He then went to the 2017 Triathlon World Championships.  After that, he stopped competing in para-triathlon.  He wanted to try to medal at the 2018 Winter Paralympics.  He thought he needed to focus on para-Nordic skiing to do that.