Hi Joe,
yes, this is post war replica of Great East Asia War medal.
Imperial Edict No. 417 of 21 June 1944 promulgated original medal.
Obverse has a chrysanthemum crest in the center of crossed swords on a eight-point star of rays. The rim has engraved cherry blossoms. The reserve shows the characters "Great East Asia War" in the center of a Japanese shield. The bar is made apart from the suspender and passes over the ribbon, with the usual four characters for "war medal".
Ribbon is 36 mm. watered silk, pea-green with 3 mm. dark blue, 3 mm. light blue and 3 mm. dark green lier edge stripes for the Navy, Air Forces and Army.
Cheers,
Nick