Between 2006 and 2010, a total of 12 semi-free ranging marsupials comprising 10 Petrogale xanthopus and two Macropus giganteus died at the Itozu no mori Zoological Park (Kitakyushu, Fukuoka, Japan). From our postmortem examinations, 541 nematodes in total were obtained from the stomachs of the deceased marsupials. The nematodes belonged to the subfamily Cloacininae (Strongylida: Chabertiidae). The nematodes obtained from P. xanthopus were identified as Rugopharynx australis, Cloacina pearsoni, Cloacina hydriformis and Macroponema beveridgei, while the nematode from M. giganteus was identified as a Cloacina sp. member. This is the first record of C. pearsoni and M. beveridgei obtained from P. xanthopus. Measurements and photographs of the nematodes are provided herein to assist future continuous surveillance of them.