amphritea japonica amphritea japonica amphritea japonica is a gram-negative, rod-shaped, non-spore-forming and motile bacterium from the genus of amphritea which has been isolated from sediments near a sperm whale carcasses from kagoshima on japan. amphritea japonica scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: oceanospirillales family: oceanospirillaceae genus: amphritea species: a. japonica binomial name amphritea japonicamiyazaki et al. 2008 type strain atcc baa-1530, jamm 1866, jcm 14782