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In page Kimono:

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Though the kimono is the national dress of Japan, it has never been the sole item of clothing worn throughout Japan; even before the introduction of Western dress, many different styles of dress were worn, such as the attus of the Ainu people and the ryusou of the Ryukyuan people. Though similar to the kimono, these garments are distinguishable by their separate cultural heritage, and are not considered to be simply 'variations' of the kimono as the clothing worn by the working class is considered to be.[citation needed]