J1 League, Japanese professional football league, collaborated with Blue Lock 30 Dec 20234 Apr 2024 Manga marketing.VideosDecember 30, 2023 J League, Japanese professional football league, collaborated with Blue Lock this year. J League was established in 1993, and this year commemorates the 30th anniversary since the league was born. Blue Lock is widely popular football manga series written by Muneyuki Kaneshiro and illustrated by Yusuke Nomura, sold over 30 million copies only in Japan.