i really think you have to go to Japan to teach English. there are alot of works such as english school Nova.

あなたは英語の教師として日本で働いた方がいいと思う。ここにはたくさんの英会話学校があるし。

他の言い方で間違っている点があれば教えて下さい

I think you should teach English in Japan as a teacher.Because there are a lot of English school there.
は、どうですかね...
　

I really don’t think you have to go to Japan to teach English. even though there are lots of English schools in Japan, this is not best timing to find a job for non-Japanese with such bad economy.
furthermore, You need to have degree to get teaching English job at least and still it is not a secure job at all. You will be the first parson who laid off. but its all up to you. good luck. we’d very welcome you to Japan!!