pseudoxanthomonas japonensis pseudoxanthomonas japonensis pseudoxanthomonas japonensis is a species of mesophilic, motile, strictly aerobic, gram-negative, non-spore-forming, rod-shaped bacteria with one polar flagellum, first isolated from human urine, riverside urban soil and anaerobic digester. 12-3t (=ccug 48231t =cip 107388t =jcm 11525t) is the type strain. pseudoxanthomonas japonensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: xanthomonadales family: xanthomonadaceae genus: pseudoxanthomonas species: p. japonensisthierry et al. 2004 binomial name pseudoxanthomonas japonensis