Embattled insurer American International Group is selling its Japanese headquarters to Nippon Life Insurance for $1.2 billion in cash.

The transaction, which would be among the biggest divestitures New York-based AIG has made to reimburse the U.S. government for its massive infusion of aid, is expected to close in the second quarter.

AIG has received more than $182 billion in financial support from the U.S. government since September.

The company is selling off a number of business units to repay part of the loan.