Keikogi

Keikogi (稽古着) (keiko, 'practice', gi, 'dress' or 'clothes'), also known as dōgi (道着) or keikoi (稽古衣),[a] is a traditional uniform worn for training in Japanese martial arts and their derivatives.

Emerging in the late 19th century, the keikogi was developed by judo founder Kanō Jigorō.

[1] Japanese martial arts historian Dave Lowry speculates that Kanō derived the uniform's design from the uniforms of Japanese firefighters' heavy hemp jackets, hikeshi banten (半纏).

[1] By 1920, the keikogi as it exists today was worn by Kanō's students for judo practice; a photo displayed in the Kodokan (judo headquarters) taken in 1920 shows Kanō himself wearing a modern keikogi.

In modern times, white, black, blue and indigo are the most common colours of keikogi.