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I know the proper way to put on your gi is to put the left side over the right side, but why is this? Where did this custom come from? I think it applies to all martial arts (at least I know it does for Aikido, Karate and Judo) or are there any exceptions?

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up vote 6 down vote accepted

Gi, or more properly dōgi (道着) is wafuku (和服), or Japanese Clothing, and the handedness (for lack of a better word) of kimono is that it is worn with the left panel over the right. It is mostly out of tradition, likely with roots in the the codification of Shintō traditions in which an order of things must be observed (for instance, when praying at a Shintō shrine, one washes their left hand first). This however is a guess based upon when we start to see the adoption of the left-over-right dressing correlating dates of Shintō's codification. As has been mentioned, in those occasions in which the body in a modern funeral is dressed in wafuku, the right panel is placed over the left.

Prior to the Heian period, we see a much larger variation in the styles of dress:

During the Nara period, the tradition was to wear a form of proto-kimono which overlapped right over left.

The modern kimono as a style of dress came into fashion during the Heian period, at which point it was adopted out of convenience and ease of construction (the tailor no longer needed concern himself with the shape of the body wearing the garment).

There are periods, as well, within the history of Japan in which the style of clothing has been controlled by law. For instance, government officials in the Meiji era were required to wear yofuku (Western Clothing) to official events. Sumptuary laws in the Edo period required the ostentatious colors of the Heian period to be forsaken for subdued colors (so that the wealthier merchant class would not upstage the less wealthy but higher caste Samurai), which lead to brocade being added to clothing as a means of displaying wealth.

Therefore, in answer to your question of "Why do we overlap left over right?", the answer is simple: Tradition. It's the same reason that we may bow to a kamidana, or that we do not wear shoes inside the dojo.

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sorry, but a tradition is often based on something else. – JP Hellemons Nov 27 '13 at 12:57
@JPHellemons which is why there's four paragraphs explaining the origin of modern wafuku, the law affecting its wear at various points, and the customs of order in Japanese culture. – stslavik Jan 8 '14 at 19:05
I know, but my point is that explains that women had right over left. Man had to wear it left over right because of the weapons. I believe that weapons are the main reason and because of that, I voted for Dungarth's answer. – JP Hellemons Jan 9 '14 at 9:06
The nara period was over 1000 years ago, and about 700-800 years before most arts of Japanese origin in which one would wear a gi were even codified. – stslavik Jan 15 '14 at 20:40

I seem to have been thaught a story similar to what Sardathrion explains, yet slightly different. Sadly, though, I have no reference other than "my sensei told me".

According to my sensei, people wore the left side on top because the inside of the kimono became easily accessible with the right hand, a bit like a big pocket, allowing to dissimulate weapons (most likely a tanto, or short knife) or carry small fans (which were popular in high society).

When someone died, they no longer needed to carry/hide weapons, at least not on this side anymore (I will admit I am not familiar with the traditionnal japanese afterlife). This is why, still according to my sensei, one would be buried with the right side over.

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Very interesting story! – THelper Apr 26 '13 at 13:11
Very interesting indeed; in fact it makes sense. I wonder why bother changing sides (from left side over to right side over) at the time of death: why not just leave it as it is (left side over)? – Lex Apr 26 '13 at 16:14
It may be something akin to button sides, which would explain the difference in death:… "Mens’ buttons are on the right side because men have always tended to dress themselves and most men (and women, for that matter) are right-handed. Womens’ buttons are on the left side because years ago (say, during the Victorian Era), the women that could afford fancy clothing with a bunch of buttons would rely on maids to help dress them." – Campbeln May 1 '13 at 3:29
To support this answer: (Judo) during the Kime-no-kata there are armed attacks. Idori, Tsukkomi and Yoko tsuki have a knife hidden in the gi as described in the answer. This can only be done when you have left over right. – JP Hellemons Nov 27 '13 at 12:56

As far as I know the left side over right is for the living. Dead bodies get kimono tied right over left. Some sources include wikipedia and Japan Zone for example. So, unless you are an undead, there are no exceptions.

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Zombie karateka are the exception :) – slugster Apr 26 '13 at 9:19
@slugster: I would class zombie karateka as undead so covered by the exception rule. Ditto for yakuza zombies with guns from the 444th portal aka Forest Of Resurrection. – Sardathrion Apr 26 '13 at 9:55
Dang, I'm gonna have to aquire that movie and watch it one weekend. – slugster Apr 26 '13 at 10:53
It is just awesome. Do it now. – Sardathrion Apr 26 '13 at 11:18
Versus is a damn awesome movie. – Anon Apr 26 '13 at 23:56

Agh heck, I'll post this as an answer:

It may be something akin to button sides. This may explain the difference in death as well, as few corpses dress themselves (zombies excepted, of course ;).

Mens’ buttons are on the right side because men have always tended to dress themselves and most men (and women, for that matter) are right-handed. Womens’ buttons are on the left side because years ago (say, during the Victorian Era), the women that could afford fancy clothing with a bunch of buttons would rely on maids to help dress them.

As a righty, I know I find it easier to tie the left side first as the whole top is less secure and my right hand is in a more comfortable position to do the tie, while the second tie (left over right) my left hand is now on point and it's a bit more awkward.

But, YMMV =)

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+1, not sure if this is accurate but it's a good theory. – Sardathrion May 1 '13 at 7:15

Handedness in all cultures is related to codes of chivalry, and western and eastern clothes (flys for pants, buttoning on shirts, flaps on Keikogi or kimono, robes or kilts) are generally right-handed for cross-body weapon wielding in men's clothing.

Women do not typically wield weapons cross-body and so do not need to worry about their lapels, flaps or flys catching on their weapon guards. It is also a sign of their "weaker sex" and need of protection that their clothing is "left-handed." Thanks, Tailors!!

Mores about right-hand dominance vs left-handedness can influence dress codes in specific cultures, especially in Middle Eastern and Indonesian dress codes.

Modern tailoring and dressing is individualized and can deviate from traditional and cultural dress codes.

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