Turns out I'm still in school so it wasn't as bad as I thought, but I want to quit and start up my own company. Plus I don't really have the time to study while I work, but if I did I wouldn't have the time to work on my company. And I don't have the money to study and not work, so it's kind of a case of balancing things out and realising that school will actually hold me back at this point, rather than giving me a leg up (which is the point of higher education nowadays, right?)
Thanks for your sympathies, though

For your JFRV you need a copy of the household registration, not the certificate (which we weren't given, anyway). The household registration has neither your passport number nor your nationality on it. So the people at immigration were fine with it (we went there straight after registering to ask what I needed for the JFRV). My police certificate hasn't come back yet, so I have to register for school before I can get my JFRV anyway (my ARC expires Tuesday, so I need to pay registration to extend my ARC until I get my stuff for the JFRV together - it's cheaper than doing a visa run, so can't complain much). The system they use isn't cross-referenced at all.
I completely forgot about that book!!!! We should go out for lunch one day (or you can come over... I've learnt to make pretty tasty curry noodles) and catch up!