The Isuzu Forward & Isuzu F-Series (kana:いすゞ・フォワード) is a line of medium-duty commercial vehicles built by Isuzu. All F-series trucks are cab over designs and the cabin comes fully built from the factory. Most models come with a diesel engine; but, some markets get CNG derivatives as well. The F-series is available a variety of cab styles, engines, 4WD or 2WD depending on the market it is sold. Most trucks are assembled in Japan; however, they are locally assembled from CKD kits in some countries.