Asian hornets, which have caused a lot of damage to the ecosystems in South Korea and Europe, have been observed in Japan for the first time.
Local nature lovers and a team led by Kyushu University Associate Prof Takatoshi Ueno said Monday they had seen the hornets on Tsushima island in Nagasaki Prefecture, NHK reported.
Asian hornets are not only very aggressive and can seriously harm humans, they are also capable of destroying existing ecosystems as they eat other insects, experts say.
Ueno told reporters the Asian hornets have a high reproductive ability and if they reach the mainland, "they will spread before you know it." He called for precautionary action to exterminate them.
Asian hornets are the biggest species of hornets, growing up to three centimeters. They persistently track down and attack anything or anyone disturbing their nests.
Ueno said the hornets most likely arrived on Tsushima aboard cargo ships from South Korea.© Japan Today