Rubuta ci gaba don wannan sakin layi - Ndiku ya fara kafa kansa a matsayin mai tsalle-tsalle a cikin manyan jami'ai a shekarar 2011. Ya fafata a gasar 2011 IAAF Diamond League kuma ya kafa mafi kyawun lokacinsa na minti 8:07.75 don matsayi na shida a taron Herculis - lokacin da ya sanya shi na tara mafi sauri a duniya a wannan shekarar. Ya kuma kasance na uku a DN Galan da na biyar a Weltklasse Zürich. Ya kasance sau biyu na biyu a gasar zakarun kamfanonin Japan. Lokacinsa na 2012 ya kasance mai sauƙi kuma ya ƙunshi 'yan tsere kaɗan, tare da cin nasara a Hyogo Relays da Japanese Corporate steeplechase sune manyan abubuwan. Duk da haka, lokacinsa na minti 8:17.88 a Meeting Areva ya sanya shi a cikin manyan 25 don taron. Ya sami babban zabinsa na farko ga Kenya a Gasar Cin Kofin Duniya ta IAAF ta 2013
, amma ya kasa gama tseren. Ya kammala Kamfanin Kamfanin Japan sau biyu a kan mita 5000 da 3000 m, amma lokacinsa mafi kyau na kakar wasa ta 8:18.78 ba shi da wani ci gaba a shekarar da ta gabata ga mai shekaru 22.