div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: 48 Contact : OA email:irtf oa@niiacjp Japan Consortium 48 Contact : OA email:irtf oa@niiacjp Japan Consortium for Open Access Repository : J PC OAR JPCOAR —7 71—15 src=https:reader035fdocumentsnlreader035viewer202206251061399a8c0051793c8c009556html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv