Plant identification

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My Japanese neighbor gave me these perennials. She said her sister sent her the seeds from Japan. I dearly love them, but when I give them to others they want to know what they are.
The flowers bloom right on the central stalk, not near the leaves. They are wonderful and spread well.
Does anyone know what they are called?
q plant identification, flowers, gardening, perennial, Can anyone tell me what this is called It grows purple and dark pink
Can anyone tell me what this is called? It grows purple and dark pink.
q plant identification, flowers, gardening, perennial, Here are the light pink ones
Here are the light pink ones.
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