[Firebird]

With the WHV you will be able to get a mobile phone, but only once you got your Alien card. You will need to apply for this card in the first 90 days anyway. I did get a prepaid phone from Softbank and was quite happy with this. For only 300yen a month you can send unlimited email up to 300kb each (they use it like sms in Japan).

A typical job would be teaching english. Finding work otherwise will be difficult but possible, but might require a basic knowledge of Japanese and will probably pay less than teaching. I´d try to find a job once you are in Japan, but if you are really short on money you could have a look before arriving.

When i came to Japan i was in a homestay the first month and than started travelling. It was a good choice to have a place the first few days but if you want to rent a place i´d recommend to try to find one once you´re there. You can have a look online whats available and maybe already contact someone but go and see the place yourself before you rent it. You won´t know where it is if you just look on a map and you wont know if there is good transport close by and if it will be close to your work or not.

Sorry i don´t know about renting appartments in Fukuoka and i don´t know about prices either but in central Tokyo you´d just get a nice room in a guesthouse for this price...

Ma recommodation for the start is: If you´ve never been to Fukuoka before than make a reservation for the first 5 to 10 days in a cheap hotel or a youth hostel. After arriving spent at least 3 days just exploring the city and the country without worriyng about a job or a place to stay and than start looking afterwards. So you can avoide having a rough start in a different culture because you´ll need a few days/weeks to get used to the country and culture and to loose your jetlag.

Enjoy!
If you have any other questions, feel free to ask, i´ve been on a WHV for 1 year as well!