He left Taiwan on 1 July, and has moved back to Dentsu Japan for another assignment within the group.
Yukiyasu Nagasaki will take over from Yuchiro, but will be based in Japan. Sean Chang, who took up the president's role last March, will be in charge of operations at Dentsu Kuohua, based in Taipei. He will report to Nagasaki.
Chang explained that the heirachy had been slightly confusing over the years before he took over the presidency, as Yuichiro had been both chairman and president. But the agency has now made it clear that the operations leadership will be a key part of the president's duties, while the supervision role will be driven from Tokyo.
An executive vice president, Toshiya Yoshida, has also joined the team in Taipei. He joined on 1 July and is charged with serving the Taiwan office's network clients including Honda, Panasonic, confectionery company Morinaga.