Tsunakawa’s appointment follows the resignation of Nobuaki Kurumatani last week amid a proposed buyout of the company.

Michel Liès takes the Zurich chair after a long career at Swiss Re; and Toshiba looks to improve its fortunes with an external chairman and CEO appointment.

Losses restated to $317m and changes introduced to shore up compliance.

Japanese governance under scrutiny as Toshiba’s accounting shock rumbles on.

Tech giant chief was aware of inflated profit results, inquiry shows.