The Japan RV Association has recommended three RV parks in Nagano Prefecture, located at altitudes between 1,000 and 1,500 meters, as a solution to summer heat during overnight stays in vehicles. The highest park, Tateshina La Planete at 1,500 m, accommodates only one vehicle per day, costing 4,400 yen per night, with a summer surcharge of 1,100 yen. Yatsugatake Harumura at 1,200 m offers sites from 2,200 to 5,000 yen, while Yutoron Suijin no Yu at 1,000 m charges 2,750 to 4,400 yen, plus 550 yen each for electricity and waste disposal. Experts note that temperature drops about 0.6°C per 100 m of altitude and advise bringing warm clothing and taking precautions against bears.
