[steven]

Even though I'm a quarter Scottish I have virtually no idea about the culture. I know about kilts and stuff like that, but no specifics.

With that being said, I find a men's kimono (montsuki) to be similar to a kilt in that it is like a skirt.

As far as the question at hand goes, if you wear a kilt regularly where you live, then why not do it in Japan. The underwear thing is crucial though-- nobody wants to see what's going on down there every time a swift moving train or subway goes by if you know what I mean (well there might be some people who do... but that's another thread on another forum).