Japan Sets Up Invasive Beetle Task Force as Red-Necked Longhorn Spreads to 20 Prefectures

Japan’s agriculture minister Norikiazu Suzuki announced on August 2 that the government has established a task force to combat the red-necked longhorn beetle, an invasive species now found in 20 prefectures. The beetle damages cherry, plum, and peach trees, causing serious harm to orchards and forests. Suzuki called on the public to kill any beetles they encounter and posted the alert on social media, which received over 8,000 likes.

What is the red-necked longhorn beetle and where did it come from

The red-necked longhorn beetle (クビアカツヤカミキリ) is a black insect with long antennae and a distinctive red thorax. It was first confirmed in Aichi Prefecture in 2012 and has since spread to 20 prefectures across Japan. The beetle is designated as a specified invasive alien species under Japanese law.

Why the beetle poses a threat to trees

The red-necked longhorn beetle attacks Rosaceae family trees, including cherry, plum, and peach varieties. Larvae bore into tree trunks and branches, causing severe damage that can lead to tree death and falling branches. The beetle threatens both ornamental trees valued for their beauty and fruit-bearing trees important to agriculture.

Government response and public action

Agriculture Minister Norikiazu Suzuki and Environment Minister established a task force to develop prevention strategies on August 2. The government is coordinating across ministries and local governments to strengthen countermeasures. Citizens are urged to crush or kill any beetles they find. Some municipalities offer bounties for dead beetles brought to local offices, though transporting live beetles is prohibited by law.

What residents should know about handling the beetles

If you encounter a red-necked longhorn beetle, you may kill it by stepping on it or crushing it. Live transport of the beetle is illegal because it is designated as a specified invasive alien species. If you are unsure how to handle a sighting, contact your local government office for guidance on proper disposal methods.

Final Thoughts

The red-necked longhorn beetle poses a real threat to Japan’s trees and fruit crops. Public awareness and participation in killing the insects are now part of the national response strategy.

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