Do any Japanese words start with n besides ンジャメナ or words related to it? N'Djamena is the capital of Chad.
It depends on what you'd count as a "Japanese word". Almost certainly nothing that is natively Japanese will start with ん. However, there are a few words in other languages that would have it. For example, "ng" is a common starting sound in names in a few languages (including Vietnamese and some Chinese dialects). I know of someone whose surname is "Ng", and it caused a lot of trouble in getting them registered in some Japanese systems since there was an automatic validation preventing them from writing it as ング.