TOKYO (Reuters) - Shares in Toshiba Corp rose about four percent on Thursday after the company said the mark-down in its profits in the past three years due to accounting irregularities will be estimated at around 50 billion yen ($419.50 million).

The announcement late on Wednesday soothed investors' fears the probe could lead to a major scandal, and helped push up Toshiba's American Depositary Receipts 12 percent overnight.

(Reporting by Hideyuki Sano; Editing by Stephen Coates)