Hello Sherlock,
thank you for your comment. There are so many schools here in Tokyo that you could apply, but there is a lot of competition here comparing to other parts of Japan.
Thank you niteelf8413 for sharing that list with us. I am sure that binz also finds this useful.
As I said, there are so many.... so many, but sooooo many teaching jobs here in Tokyo. For me the best website to look for one is this:
http://tokyo.craigslist.jp/
I personally don't know much about the particular schools mentioned, so I can't say anything. What you really need to pay attention though is whether they require visa or provide one, whether they offer accommodation or not and pay your transportation expenses. A medical insurance plan would be ideal, but you can always enroll to the NHI sceme and pay your own insurance.
I hope this helps! Good luck!
Stefania/JapanesePod101.com