Lake Biwa Marathon
Kipruto competed sparingly in 2012, running a best of 60:46 minutes at the Roma-Ostia Half Marathon and entering two marathons: he was 13th at the 2012 London Marathon and managed only ninth at the Hangzhou International Marathon. The following year he returned to action with a runner-up finish at the Egmond Half Marathon (behind Abera Kuma) and won the Lake Biwa Marathon in Japan. He continued his winning streak by finishing first at the Lille Half Marathon in a personal best 60:39 minutes and edging Mark Kiptoo by one second to take the title at the Frankfurt Marathon.