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In fact, this work called Japanese tradition is a work of German Friedrich Froebel (1782 - 1852). This fact is not known very much in Japan. There is a lot of variations.
In the first, fold the base shape with paper A.
Fold and unfold
Fold and unfold
Turn it over
Fold and unfold
Fold and unfold
Turn it over
Fold it along folded lines like the blue points are gathered to center.
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In process
Finished. It's a basic of Froebel patterns
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