<p>The accurate distribution area of <i>Aurelia malayensis</i> needed to be clarified because this moon jellyfish species is supposed to influence marine ecosystems and human activities through their aggregations in subtropical and tropical regions. However, the northern limit of this species has not been determined though this information is essential to monitor their population. Given this situation, we investigated <i>Aurelia</i> distributed around Ogasawara Islands, which are located in a subtropical region of Japan. Molecular phylogenetic and morphological analyses were conducted to identify <i>Aurelia</i> in Ogasawara Islands. The molecular phylogenetic analysis revealed that the lineage of <i>Aurelia</i> in Ogasawara Islands is <i>A. malayensis</i>. Furthermore, the morphological characteristics of its polyps, ephyrae, and medusae corresponded to those of <i>A. malayensis</i>. Based on these results, it is clarified that this species is distributed more widely than previously thought, and its northern limit is updated to Ogasawara Islands. Considering its adaptation to high temperature and potential dispersal via ocean currents, it is possible that <i>A. malayensis</i> expands further northward in the near future. Continuous monitoring is also necessary in East Asia (northernmost limit of <i>A. malayensis</i>) for understanding the influence of global warming. The data set of DNA sequences and morphological characteristics were successful to be obtained from the same lineage in this study. Such integrated knowledge is indispensable to organize the phylogeny and taxonomy of jellyfish in future studies of marine biodiversity.</p>