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Hasho is a Japanese term that refers to the ratio of the leaf size to the trunk diameter of a bonsai tree. It is an important factor in creating a harmonious and realistic appearance of a miniature tree. A bonsai with a large trunk and small leaves is said to have good hasho, while a bonsai with a thin trunk and large leaves is said to have poor hasho. Hasho can be improved by various techniques, such as defoliation, leaf pruning, leaf pinching, and selecting appropriate species for bonsai.

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