You didn't mention how far along you are in the NVC process, but I had the same situation, where I requested Naha on the 1-130, and when it got to NVC, they inadvertently listed Tokyo as the interview location. I simply went to the public inquiry form, told them of the error, and about a month later, everything was changed correctly to Naha. There was a bit of a concern though, as they will issue a new case ID and invoice number, but if you have already paid all the fees (as I had), it's just an IT transfer and you can log into the new site with no issues. Speaking of time frames, I don't think this has resulted in any delay in my case, as I am expecting to be DQ next month, but if you have been at NVC for a long time, it might perhaps delay your case a bit.