The United States could initially sell four F-35 Joint Strike Fighter conventional takeoff and landing (CTOL) jets to Japan with an option for 38 more, according to a Defense Security Cooperation Agency (DSCA) statement.

The total estimate cost of the proposed Foreign Military Sale is $10 billion, according to the statement. DSCA said they notified Congress of the potential deal April 30.

The prime contractors on the deal are Lockheed Martin [LMT] and Pratt & Whitney Engines, a division of United Technologies Corp. [UTX], according to the statement. Pratt & Whitney will contribute one of its F135 engines for each plane as well as five spare engines. Lockheed Martin produces the F-35.

Other aircraft equipment included in the F-35s are: Electronic warfare systems; Command, Control, Communication, Computers and Intelligence/Communication, Navigational and Identifications (C4I/CNI); Autonomic Logistics Global Support System (ALGS); Autonomic Logistics Information System (ALIS); Flight Mission Trainer, Weapons Employment Capability; F-35 unique infrared flares; reprogramming center; F-35 Performance Based Logistics and other subsystems, features and capabilities, according to the statement.