KEY POINTS
  • The Tokyo-based commercial lender said it now expects to post a net loss of 28 billion yen for the fiscal year ending Mar. 31.
  • Aozora shares sank by as much as 21.5% to 2,557 yen (about $17.41), its lowest closing level since May 31.
  • Japan's Nikkei 225 benchmark closed down 0.8% Thursday.
  • Aozora said it expects the U.S. office market to only stabilize "in another year or two."
A pedestrian walks past a sign for Aozora Bank Ltd. at the company's headquarters in Tokyo, Japan, on Friday, May 14, 2010.

Shares of Aozora Bank tumbled to their lowest level in eight months Thursday after the Japanese bank warned of a fiscal-year net loss due to its exposure to U.S. office loans.

The Tokyo-based commercial lender said it now expects to post a net loss of 28 billion Japanese yen ($191 million) for the fiscal year ending Mar. 31, a swing from its previous forecast for a net profit of 24 billion yen.