Thanks for the reply mate.
Obviously she's at 12V when running, so there's no charge.
Like I said, my dash light is never on, so I guess it's been like that for a while in Japan (fresh import) and the bulb's burnt out.
I was going to pull the alternator and get it tested to be sure it's dead, though wanted to check first if anyone here had any other ideas.
Thanks again Sumo.