Exchange students continue to pay their regular Ohio State tuition for the duration of their exchange program.
Room rates are based on the high end of a range of possible costs; the actual cost of a student's housing will vary, and may well be less expensive than what is estimated here. The estimate is based on available on-campus housing. Off-campus housing may be more expensive.
The Japan Student Services Organization (JASSO) estimates monthly food expenditures ("board") at 25,000 JPY or approximately $219/month. International Christian University also provides guidance on estimated fees and expenses.