BRUSSELS - Japan and the European Union agreed Tuesday to strengthen their cooperation over regulations regarding social media and other online platforms.Based on the agreement, reached at the fourth ministerial meeting of the Japan-EU Digital Partnership framework held in Brussels, regulatory authorities of the two sides will promote talks on taking measures against illegal content and ensuring transparency in implementation rules.From Japan, communications minister Yoshimasa Hayashi, digital transformation minister Hisashi Matsumoto and parliamentary vice industry minister Toshiyuki Ochi took part in the meeting.