O-Hayo Sensei - Free electronic newsletter that typically lists 100+ teaching (and other English language related) positions at dozens of different schools and companies all across Japan.
Employers, Agencies & Placement Services
AEON - Specializes in teaching English to Japanese high school, university, and adult students who have a genuine desire to increase their English abilities.
English Telephone Club - For those that already live in Japan, give English lessons in your home.
Gaba Corporation - One to one instruction.
Heart English School - Heart School needs assistant English teachers for public schools in Tokyo city and the surronding prefectures - Gunma, Tochigi, Ibaraki, Saitama, Chiba and Kanagawa (basically the areas in a circle around Tokyo city), and also Sapporo city, in Hokkaido.
InsideJapan Tours - Japanese speaking tour leaders required to lead small groups from March to November.
Interac - Nine domestic and three overseas offices that serve a client base of more than 4,000 organizations. There is a staff of 100 Japanese and over 300 native speaking Language Consultants. Only individuals who are professional and seriously interested in teaching, and who possess at least a Bachelor's degree and two years of post-graduate business, teaching or other professional experience should apply. Applicants must be enthusiastic about pursuing the challenges and rewards of living and working in Japan. North American or British accents are preferred.
Japanese Ministry of Foreign Affairs JET Programme - The Japan Exchange and Teaching Programme places assistant language teachers in Japanese schools.
Ota English School - Full and part time teaching jobs in Japan.
San Consulting - Ski, beach and golf resort jobs in Japan. Enthusiastic bilingual staff recruited. Visa sponsorship included. Applicants must be in Japan.
Advice & Useful Sites for Finding Work
BoobooSki - Arranges ski and beach resort jobs around Japan for foreigners eligible for a Japanese Working Holiday Visa. The positions you'll be eligible for depend on your Japanese speaking ability.
DaiJob.com - Japanese job search.
Embassy of Japan in the UK - Various cultural and government information including studying and the JET teaching programme.
ESL Japan - Guide to teaching in Japan by Dale Bay. Doesn't look like it has been updated for some time.
ELT News - A website for English teachers in Japan.
FindStudents.net - A service for that English teachers in Japan find private teaching jobs.
Gaijinpot.com - The latest job info for foreigners in Japan.
Hello Sensei - A teacher student matching service. Part time teaching jobs all across Japan.
JALT - The Japan Association for Language Teaching, a not-for-profit professional organization of people interested in promoting excellence in language learning and teaching. JALT publishes a monthly magazine and a biannual journal. JALT chapters hold regular meetings featuring workshops or lectures related to teaching.
Japan Jobs - Japan's jobs, career and employment site for foreigners and Japanese bilinguals.
Jobs in Japan - Info for living and working in Japan. The site covers English conversation schools, teaching EFL, recruiting and placement companies, executive search, head hunting, foreign firms, writing, rewriting, proof reading, modelling, acting and entertainment positions, accommodation, parties, socializing, clubs, Japanese international organizations and more in Tokyo, Osaka and all over Nippon.