<prompt> Qedela umusho olandelayo: NgoMashi 7, 2008, lapho uKumagai eneminyaka engu-17 ubudala, waqale ukudlala eqenjini lesizwe laseJapan bebhekene neCanada. Ngo-Agasti, uKumagai wakhethwa eqenjini lesizwe laseJapan labangu-U-20 eMqhudelwaneni Womhlaba Wabangu-U-20 ka-2008. Ngo-2010, wadlalela iqembu le-U-20 njengomphathi ngesikhathi se-2010 U-20 World Cup. Ngo-2011, wayeyingxenye yeqembu laseJapane elaphumelela iNdebe yoMhlaba, wafaka inhlawulo yokuwina emdlalweni.  <response>: yokugcina ngokumelene ne-United States. Ubuye waba seqenjini lama-Olimpiki asehlobo ka-2012 kanye neNdebe Yomhlaba ka-2015. IJapane yaba ngowesibili kuyo yomibili le miqhudelwano. NgoJanuwari 2017, waqokwa njengomphathi weJapan ngumqeqeshi u-Asako Takakura. Ngo-2018, iJapane yanqoba iNdebe Yase-Asia yango-2018. Udlale imidlalo engaphezu kweyikhulu eJapan. NgoNovemba 10, 2019, uKumagai washaya igoli lakhe lokuqala emdlalweni wobungani weJapan ngesikhathi benqoba iNingizimu Afrika ngo-2-0. 