Whakakihia te rerenga e whai ake nei: I nga taumata rangatahi rangatahi, kua tohu a Kulboka i a Lithuania i runga i te atamira o te ao i etahi wa, tae atu ki te 2014 FIBA Europe Under-16 Championship me te 2015 FIBA Europe Under-18 Championship. I eke ia ki te 15.7 tohu kapa-nui mo te kemu i te 2016 FIBA Europe Under-18 Championship, i te huarahi ki te mētara hiriwa. I whakataetae hoki ia mō Lithuania i te
2017 FIBA Under-19 Basketball World Cup, he toharite o te roopu-teitei 13.7 nga tohu mo ia whakataetae. I te 26 o Hui-tanguru 2018, i tiimata a Kulboka hei mema o te tiima a-motu o Lithuania, ma te tohu e iwa nga tohu, e rima nga rebounds me te tuku i nga awhina e rua, me te awhina ki te patu i te tiima a-motu o Kosovo, ma te 106<unk>50, i te wa o te 2019 FIBA Basketball World Cup tohu.