In 2017, the red imported fire ant (RIFA), Solenopsis invicta, was discovered for the first time in Japan at several locations, mainly ports and harbors.  While “killer ants" were widely spoken about in the major media causing panic, the Ecological Society of Japan has promptly responded to this problem by releasing two public statements from a scientific point of view. The aim of this symposium is, first of all, to share the correct information on the biology and invasion status of RIFA in Japan more widely to Japanese ecologists. Then we review and compare previous eradication and control projects abroad. Finally, we predict potential future impacts by this pest in Japan and propose countermeasure through discussions between foreign and Japanese experts. We have invited Dr. Ross Wylie, who is the leading researcher on RIFA management in Australia, to speak at the symposium. The co-organizer, Prof. Ching-Cheng Yang, is also an expert with a long time involvement on invasive ants including RIFA in Taiwan and the USA.  Although the official language of this symposium is English, we will be presenting in both Japanese and English with bilingual slides for Japanese speakers, as this issue should widely attract public interest.