ɪn ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈaɪv, mˌɔːɹɪˈoʊkə wʌz sᵻlˈɛktᵻd dʒəpˈæn jˈuː twˈɛnti nˈæʃənəl tˈiːm fɔːɹ nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈaɪv wˈɜːld jˈuːθ tʃˈæmpiənʃˌɪp, bˌʌt hiː dɪdnˌɑːt plˈeɪ ɪnðə mˈætʃ.
In April 1995, Morioka was selected Japan U-20 national team for 1995 World Youth Championship, but he did not play in the match.