“Dyer's knotweed” in Japanese
Short answer
Dyer's knotweed in Japanese is “藍” (ai). Full meaning: dyer's knotweed (Persicaria tinctoria, used to produce indigo dye); indigo (dye); indigo (colour).
Other ways to say “Dyer's knotweed” in Japanese
蓼藍
tadeai dyer's knotweed (Persicaria tinctoria, used to produce indigo dye)
藍蓼
aitade dyer's knotweed (Persicaria tinctoria, used to produce indigo dye)
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