Hello!
Yeah, Japan is the best place to teach in asia. The cost of living is a lot higher but you also can earn a lot more cash.
Your basic teaching wage is between $3000-$4500 a month and you work between 25-35 hours a week to get this much
Great thing is tax is only 6% so you'll easily save $10,000 in a year. If you knuckle down it'd be more like $20,000+
If you come over with a girlfriend you'll easily save $30,000 between you both in a year
BUT dont do that cause you'll break up!!!! Ha ha, over that now
Qualifications:
ANY basic degree is fine. If you come from NZ and have a working holiday visa (apply at Jap Embassey in Auckland/Wellington) you can work in Japan for 12 months and a lot of English companies (like NOVA) will hire you even if you dont have a degree
To get a working holiday visa you need to have about $4000NZ and a return ticket.
Hope this helps. Any more questions?