JAMA – Japan Automobile Manufactures Association
JASO – Japanese Automobile Standards Organization
JEVS – Japan Electric Vehicle Association Standard
J-LEV – Japanese-Low Emission Vehicle
JNCAP – Japan New Car Assessment Program
JPEG, JPG – Joint Pictures Expert Group
JTCC – Japan Touring Cars Championship
JTDm, JTDM – Jet Turbo Diesel Multi
JWRC – Junior World Rally Championship
JZS – Jelczańskie Zakłady Samochodowe