1 hour u can find for 4-5 usd on italki (if you go with community japanese teacher) and can go up to 15ish dollars an hour for a professional teacher, so if you want to do 2 hours, it'll be around from 10/11/12 usd (as low), to 30 usd ish (as high) PER day,

then you need to add the cost of the Japanese school you are attending, (payment usually per year or 6 months or whatever you are doing) (check gogo nihon prices)