"Dentsu" 電通 is the largest advertising agency in Japan, but is famous for being dominated by Korean origin staffs in Japan. 
It also became famous because a pure Japanese young female employee (Above photograph)was "killed by overwork". 

Dentsu is also famous for forcing advertising Korean related things.

On the Internet, Koreans and Chinese origins in Japan often declear "We will quit pure Japanese staffs due to overwork death, power harassment, sexual harassment, and hiring, promoting Koreans and Chinese origines in Japan and we will take over Japanese companies."