Ken WakuiKen Wakui.

Ken Wakui (Japanese: 和久井健, Hepburn: Wakui Ken) is a Japanese manga artist best known for his works Shinjuku Swan and Tokyo Revengers. Wakui debuted with Shinjuku Swan in 2005 which became a notable commercial success and received multiple adaptations; the series concluded in 2013. His three shorter series, Abaddon, Budgerigar and Desert Eagle were released from 2010 to 2016.