Job wise you could try these
https://jobs.gaijinpot.com/index/index/lang/en
https://jobs.ecentral.jp/japantoday/
More than likely you are not going to get any job other than as an eikaiwa monkey, and jobs
teaching English are not as common as they once were. Without basic functional Japanese
I would think its pretty hard to get other kinds of short term jobs.
However there are tech ones which don't need any ability.
https://jobs.gaijinpot.com/index/vie...5/job_id/33950
What kind of visa do you have as they are quite strict and they restrict you to certain
types of job, not that it cant be changed.
The gaijin card's proper name is gaikokujin touroku shoumeisho.
PAYG phones don't exist in the same way as here, I expect something to do with laws about
tracking phones for criminal use. You basically have to register one with your bank account
and where you live, then you buy a 1000円 card which lasts 30 days. I am not 100% sure if
there are other ways around it maybe the lesser ones like willcom have something different but
thats what I have to do every time I go.
Money wise travellers checks are pretty good you even get better rates on them. Dollar ones will
be easiest to cash trust me. Also open a citybank account my wife has one the other way around
and she can draw money from her account in Japan from nearly any ATM in the UK.