My children are mixed-race and have dual nationality (UK and Japan). As such they also have both passports, but when my wife went to City Hall to renew my son's, she was told that because he has a foreign passport (which he obtained subsequent to the Japanese passport we're trying to renew), his Japanese citizenship may somehow have 'expired'. Now, I realise this is ridiculous, and that children can have dual nationality and multiple passports here until they're 22 (officially, that is - it sounds like a lot of people keep them unofficially beyond that), but does anyone else have a similar experience and / or any advice about dealing with local government officials who aren't particularly knowledgeable about immigration / nationality / passport rules and regulations? I'm going to go along with my wife tomorrow to try and sort things out, although among other things, the guy she talked to said we should call the British Embassy in Tokyo to 'check' what the rules are, which to be honest is his job, not ours. Plus, he's not going to know whether I've actually called or not, and if I have, what I've been told. But anyway, any thoughts or advice on how to deal with this would be much appreciated!