I don't know anything about Japanese clothes, but a fair bit about medieval Europe. There's huge amounts of fashion information but short answer is up until the 15th century (ish) almost everything was a pullover type garment. Shirts, gowns, cotes etc.. were pulled over the head, and a belt was worn to hang things off. So it becomes a non issue there.

Once doublets became the go to in the 15th century (they did exist earlier) men wore what was essentially a jacket, kept shut with "laces" (known as points). Again, mostly a non issue as they're very form fitting, and certainly nothing you would fight in. Moving into the 16th century you begin to get trousers as we know them today. Previously you wore "hose" which were kept up by being fastened to the bottom of a doublet. This is as inconvenient as it sounds believe me. From that point doublets evolve into clothes wear familiar with today, shirts, jackets, trousers etc... With the only real difference being style. In Western society not everyone could carry a sword but everyone dressed the same so I doubt very much that carry weapons was factored in, I've certainly never read anything to suggest otherwise.

What little I do know of feudal Japanese society is that peasants often didn't wear kimonos, and that a "gi" (the white jackets for japanese martial arts) are purposefully styled after kimonos to make grips applicable to everyday life. So in that sense I could see there being a correlation but that's pure speculation on my part.