ɪn dʒəpˈæn, nˈiːoʊnˌeɪɾəl skɹˈiːnɪŋ wʌz pɹˈiːviəsli pɚfˈɔːɹmd ˌɔn ˈɪnfənts wɪðˌɪn wˈʌn mˈʌnθ ʌv bˈɜːθ; ˈɪnfənts dˈɛmənstɹˌeɪɾɪŋ ɐ blˈʌd hˈɪstɪdˌiːn lˈɛvəl ʌv sˈɪks ˌɛmdʒˈiː slˈæʃ dˌiːˈɛl ɔːɹ mˈoːɹ ˌʌndɚwˈɛnt kˈɛɹfəl tˈɛstɪŋ æz səspˈɛktᵻd hˌɪstɪdaɪnˈiːmiə kˈeɪsᵻz.
In Japan, neonatal screening was previously performed on infants within one month of birth; infants demonstrating a blood histidine level of 6 mg/dl or more underwent careful testing as suspected histidinemia cases.