Financial Field has published a cost estimate for a year-long motorhome tour of Japan by a couple. The calculation draws on October 2026 data from camper comparison site Camp Mitsu covering 50 models. With a vehicle purchase of 6 million yen and 20,000 km driven, fuel costs are put at 340,000 yen. Including food, stopovers and other expenses, the total comes to 9,305,000 yen, within a retirement payout of 20 million yen.