Getting to Japan
If you're prepared to work, the next step is finding an English teaching job in Japan. Of course you can go there by yourself and begin the search personally, it’s recommended to set a couple of deals via the phone before the leave. The internet and teaching job databases will likely quickly become your new best friend!

If you want to get a new job in Japan, remember that you need a working visa.  This can be an extremely time-consuming process, and visas must be filed from your home country. But if you are one employed by the school, you have good chances that you will be assisted further more in other arrangements. Some schools will even pay for your airfare to help you get back and forth. Try to deal with your employers everything about time, pay, and schedule of your work in order to omit difficulties in future.

What to expect
 If you've found yourself a job and made all the arrangements, the only thing left to do is get started. You should bear in mind that teaching in Japan requires at least one compulsory year of work.  After all, you'll need to be present for an entire school term if you're teaching in a high school or university. If a conversational school or a business organization had employed you, your terms will be decided between you and the employer.

It'll be a lifestyle change, and it'll be a definite challenge. But after all- you wouldn't be doing this if you weren't ready for some adventure.