TOKYO—SoftBank Group Corp., the operator of the world’s largest technology fund, said it corrected four years of tax filings after Japanese authorities uncovered ¥93.9 billion (about $875 million) worth of unreported earnings at offshore subsidiaries.
The Tokyo Regional Taxation Bureau said SoftBank failed to report earnings at three subsidiaries, located in Bermuda and Singapore, of its U.S. telecom units Sprint Corp. and Brightstar Corp. for four years through March 2016. Bermuda has no corporate tax, while Singapore’s...