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shibui (渋い) (adjective), shibumi (渋み) (noun), or shibusa (渋さ) (noun) are Japanese words which refer to a particular aesthetic of simple, subtle, and unobtrusive beauty. Like other Japanese aesthetics terms, such as iki and wabi-sabi, shibui can apply to a wide variety of subjects, not just art or fashion.

Shibusa is an enriched, subdued appearance or experience of intrinsically fine quality with economy of form, line, and effort, producing a timeless tranquility. Shibusa includes the following essential qualities:

Shibui objects appear to be simple overall but they include subtle details, such as textures, that balance simplicity with complexity.

This balance of simplicity and complexity ensures that one does not tire of a shibui object but constantly finds new meanings and enriched beauty that cause its aesthetic value to grow over the years.

Shibusa is not to be confused with wabi or sabi. Though many wabi or sabi objects are shibui, not all shibui objects are wabi or sabi. Wabi or sabi objects can be more severe and sometimes exaggerate intentional imperfections to such an extent that they can appear to be artificial. Shibui objects are not necessarily imperfect or asymmetrical, though they can include these qualities.

Shibusa walks a fine line between contrasting aesthetic concepts such as elegant and rough or spontaneous and restrained.

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