Red spider lily (Lycoris radiata), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Lycoris_radiata
Red morning glory (Ipomoea coccinea), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Ipomoea_coccinea
Littlebell (Ipomoea triloba), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Ipomoea_triloba
Cobbler’s pegs (Bidens pilosa var. pilosa), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://www.nies.go.jp/biodiversity/invasive/DB/detail/80460e.html; https://weeds.brisbane.qld.gov.au/weeds/cobblers-pegs
Common evening-primrose (Oenothera biennis), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Oenothera_biennis
Prairie fleabane (Erigeron strigosus), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Erigeron_strigosus
Yellow foxtail (Setaria pumila), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Setaria_pumila
Johnson grass (Sorghum halepense), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Johnson_grass
Japanese hop (Humulus japonicus), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Humulus_japonicus
Kudzu vine (Pueraria montana var. lobata), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Pueraria_montana_var._lobata
Japanese jacinth (Barnardia japonica), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Barnardia_japonica
Japanese morning glory (Ipomoea nil), Arakawa River, Kofu, Yamanashi, 10/08/2025
https://en.wikipedia.org/wiki/Ipomoea_nil
Common eveningprimrose (Oenothera biennis), Arakawa River, Kofu, Yamanashi, 10/08/2025