The author spent two nights at a campsite on the Doshi River in Yamanashi Prefecture, about a two-hour drive from central Tokyo, joined by two motorhomes owned by friends. Both friends bought used motorhomes for around 9 million yen after retirement: one for traveling around Japan with his wife and dog, the other for long trips along the coast. The author lists advantages such as protection from bears, quick awning setup, weather independence, food storage in a fridge, and socializing after 21:00; drawbacks include parking and grocery shopping difficulties and the need for extra attention while driving.
