There's no top-secret, super-special list of rules about interview attire that's made just for JET. Also, I know these posters were around a while ago, but what is the deal with 'hose' or whatever the US term is? Every time there's a discussion on professional attire, the panty-hose/tights police seem to leap out and start giving precise instructions for exactly how they 'must' be worn, and only unprofessional peeps/ unladylike ladies/ SLAGS wear xyz kind/colour. I highly doubt that a candidate will be disqualified for wearing black tights, or I would have been right out the door.
Neat, clean, smart. That's the key. There are no top-secret rules, and no one will be expecting you to dress up like a carbon-copy of a Japanese person. Dress how you would for any other professional interview in your country. The only particular points I would make are: cover tattoos; take out any 'unconventional' piercings, i.e. anything but a single set of earlobe piercings; keep your bust, shoulders and knees covered. I think that those are all part of the interviewing conventions in most countries anyway (or in mine, at least
). But don't stress the details too much- worry more about being a good candidate, and regard your attire as a peripheral.