If you have a Japanese buddy and aren't trying to get low prices, Japanese layout Filcos are everywhere. Even ebay USA has Japanese layout Topres and Filcos. But the USB port and backlight you want seem hard to find.
One question of course, is how do you propose to deal with the keycap problem. You are permanently stuck with the original keycaps.
Price isn't too much of an issue, my buddy (who knows nothing about keyboards btw) is coming over in a couple of weeks so I was hoping he'd buy them there and bring them with him to London.
And if you're talking about key cap wear, I'm not actually too fussed to be honest, if I don't go to Japan myself in the next few years then I'll just use the double shots from my G80.
If you're talking about key cap layout then it's not an issue, it's a plus.
It'd be real convenient to have the USB &/or headphone jacks, I was wondering if anyone knew any other makes that aren't too known outside Japan because the last time I went there I remember seeing quite a few brands that I hadn't ever seen here on geekhack (don't ask me for names, I was only 15).
Anyone in Japan with any info on the matter?