- Scientific Name: Fallopia japonica
The perennial Itadori flower is found on all four main islands of Japan, along with general East Asia.
It is said in the Nihon Shoki that a Tajihi Flower (Itadori Flower) fell into the well where Emperor Hanzei's bath water was being drawn from. He henceforth got the name "Emperor Tajihi no Mizuhawake".
Notes
Japanese Knotweed
Fallopia japonica
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