Although not actually one of the War Medal series I'll include this WWI Victory Award with them anyway.
Representatives attending the Paris Peace Conference agreed that each of the Allied nations would award a Victory Medal of similar design to their respective participants.
Japan's version, breaking from the tradition of showing a winged figure which had no meaning to them, instead depicts the figure Take-Mikazuchi-no-Kami on the obverse. He was one of eight sons created by the primeval god Izanagi. He subsequently went on to defeat his brothers in battle and conquer all of Japan.
Reproductions of this award do exist and can be identified by the soft details. Particularly in the area of the spear point and facial features.