Last Updated：2025/11/20
Japanese knotweed has spread along the riverbank, outcompeting native plants and damaging foundations.
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Japanese knotweed has spread along the riverbank, outcompeting native plants and damaging foundations.
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オオイタドリ（Fallopia japonica）は川沿いに広がり、在来植物を駆逐して建物の基礎を損なっています。
