T=0: Traditional edible use in Japan (young shoots) with no obvious toxicity in animal studies at 50-100 g/kg (Frohne & Pfänder 2005). A=0: Documented use as animal fodder without toxicity reports. I=5: EU Regulation 1143/2014 listed species, Global Invasive Species Database (IUCN/ISSG): listed among the world's worst invasive alien species. Dense monocultures causing native biodiversity collapse and infrastructure damage (concrete, asphalt penetration). Core Index: BAN (automatic, EU 1143/2014 listed). Automated Flag ECO generated (I≥3). Classification MARRON: (I≥3 OR BAN) AND Score<12 AND NOT priority 1-2. Remarkable paradox: traditional medicinal plant and animal feed became ecosystem engineer (invasive) in Europe.