do some research in your town(what town are u in) and find out where the local private english school is. go down their with a sign that says
Hello. , My name is ............. , I am ..... years old, I like ..... and ..... and am interested in learning Japanese. If you would like to teach me and I can help you with your english please email me at ................... looking forward to your email .........
ask if you can put it on their notice board
Language exchange. Its kinda like blind dating. It also often turns into casual dating. good luck be nice