There are several synonyms that represent the color Japanese red. One of the synonyms can be vermilion. Vermilion is a bright red pigment that has its origin in minerals. Another synonym could be scarlet, which is a reddish-orange color that is often associated with passion and energy. Another possible synonym could be carmine, which is a deep red color that is derived from the cochineal insect. Other red hues that can also be associated with Japanese red are ruby, garnet, and wine red. Overall, these synonyms can be used interchangeably to describe the deep red color that is associated with Japan.