Fallopia japonica, the Japanese knotweed, a large herbaceous perennial plant species native to Japan, China and Korea
Research has also been carried out on Mycosphaerella leafspot fungus, which devastates knotweed in its native Japan.
The Source to Sea and Wiltshire Invasive Species projects proactively seek out areas affected by invasive species, such as Himalayan balsam and Japanese knotweed, removing and disposing of these damaging non-native plants.
Camellia japonica | Lonicera japonica | Cleyera japonica | Fallopia japonica | ''Ulmus davidiana'' var. ''japonica'' | Saccharina japonica | Fatsia japonica | ''Saccharina japonica'' (species synonym ''Laminaria japonica'') | Ranzania japonica | Prunus japonica | Orostachys japonica | Kumba japonica | Kerria japonica | Julia japonica | Inioteuthis japonica | Fauna Japonica | Fagus japonica | ''Ehretia dicksoni'' var. ''japonica'' | Apis cerana japonica |