Let me first say that I think this is a great idea for a project and Its hardly disrespectful, partly given the care you clearly have for the victims. While I don't have any direct help to give, might I suggest (if you haven't already) directly going to the Japanese government (specifically a embassy) to ask for their assistance? Present them with your aims (like you have here) and they might be willing to assist you in some way.
Good luck in your endevours here and PLEASE keep us updated. I'd love to see what you come up with.