Last year, Japan picked Lockheed to build a powerful new $1.2 billion radar meant to guard against North Korean missile strikes.

The Pentagon's Defence Security Cooperation Agency notified Congress of the possible sale on Tuesday.

The AEGIS weapons system approval also included approval for a related command and control processor refresh that will be done by General Dynamics Corp the Pentagon said.

(Reporting by Mike Stone in Washington; Editing by Richard Chang)

By Mike Stone

Stocks treated in this article : General Dynamics, Lockheed Martin Corporation