Also, while I think 現場 does have some sheer genius as a product name, I question the wisdom of using it in an English-speaking market. It would take me five minutes to explain why it's a really good name and, in that time, I should have been selling the actual product rather than the naming decision. Gemba isn't one of the few dozen Japanese words you can reasonably expect college-educated Americans to know. I can guarantee you that even as a Japanese speaker I will botch your romanization the next time I try to talk about this company. Additionally, expect to be "That jewelry thingamagig" if non-Japanese speakers remember the name at all.
Great idea for a service. You might consider eventually creating some resources on how to conduct one of these interviews for the maximum benefit of the company.