Demand for teachers:
Very High

Main TEFL regions:
Tokyo, Osaka, Fukuoka, Kobe, Kyoto

Main types of teaching:
Younger Learners: Conversational English, General English
'Conversation Lounges': Conversational English
Vocational Schools: Conversational English, General English, ESP
In-company': Conversational English, General English
Crammer Schools: Conversational English, General English

Busiest periods:
September - June

Salary:
¥220,000 - ¥320,000 per month
Pay is commensurate with a teacher's qualifications and experience.

Tax:
6-9%

Contracts:
1 year

Visa requirements:
Work permits arranged by employer

Requirements:
English speaker
University degree

http://en.wikipedia.org/wiki/Japan