Abstract
The invasive alien mantis Hierodula sp. has already established in Japan, but introduction routes of the species have not been elucidated so far. We newly found the egg cases which are considered to be of this kind of species, from commercially imported bamboo brooms. We also confirmed that they were able to hatch normally and that their morphological and color features are consistent with already known larvae of the species. If bamboo brooms play a main role in relation to the introduction, it can be reasonably explained what the species has been confirmed in various places at the same time. Their colonization pattern looks different from that normally seen in other alien species.
