Rubuta ci gaba ga wannan sakin layi - Kulagin ya kasance memba na matasa 'yan wasan kasa na Rasha. Tare da 'yan wasan matasa na Rasha, ya taka leda a 2010 FIBA Turai Under-16 Championship, 2012 FIBA Turai Under-18 Championship, inda ya kasance memba na All-Tournament Team, 2013 FIBA Under-19 World Championship
, da kuma 2014 FIBA Turai Under-20 Championship.