Accepted File Formats:
Standard Web Formats (.jpg, .gif or .png); Vector Formats (.eps, .pdf or .ai)
If elements of matcha green tea such as the colour, the accessories such as chasen or chawan, etc can be incorporated great. It's not essential though.
I would like it to be informed by traditional japanese design such as for machiya. Another element that might not be a bad idea is a noren, a hanging split textile screen outside japanese shops. Google both these terms and Gion for inspiration.
Colour scheme is as for traditional japanese shops, dark browns, rust, golden, white, black, bambooÂ etc.
Otherwise matcha green is an alternative.Â
None of these are dealbreakers so if you come up with something completely different but inspired, you'll win.
If you need any more info let me know.