In one of my review sentences today I noticed the loan word for kiwi-fruit「キウイ」and it got me thinking. I as a New Zealander often just refer to myself as a Kiwi, similar to an Aussies (Australians), or Canucks (Canadians).
So how well known do you think these nicknames are to your average Japanese native? Would I be understood if I referred to myself as a キウイ, or would receive strange looks like a person going around calling themselves a fruit! xD This could also extend to regional terms like Texans or Yanks.