Officials in the western Japanese port city of Kobe say about 100 more fire ants have been found in a container storage space.
The highly poisonous ants are originally from South America. Their sting can cause anaphylactic shock, which may result in death.
Hundreds of them were found on May 26th in a container that was unloaded at Kobe Port and transported to Amagasaki, east of Kobe. It was the first time the ants were found in Japan.
The container came from Guangdong Province in China.