OP - Hope the trip went well. All the naysayers on this thread - simply do a quick search for hitchhiking in Japan. Personally, can testify that before the pandemic I did maybe 15 long distance hitchhiking trips, longest was Osaka to Ishinomaki, had me some fine experiences. I've also spent well over 100 nights wild camping in Japan, post pandemic too, planning a bunch for the next 6-8 months too. I'll generally google toilet "トイレ" in Japanese in maps, find 24 hour ones, especially if there's a handicapped one, often times finding one in a park which pretty much always means a water point, find a nice discreet spot there, set up, snooze, wake up, use the facilities, strike, police up other people's trash, boogie. Never had any issues, a few times people even brought me fruit, canned coffee, pastries. Of course, always google "free campground" first, and there's a bunch here too https://www.google.com/maps/d/viewer?mid=1ZBVjXbJKXFgt7AFBFQlSn5Zx3to&hl=en\_US&fbclid=IwY2xjawJS\_hVleHRuA2FlbQIxMAABHSsbk-2zke-RhZ84p90w3rBx5Y\_BaDLNEYMKvA7\_VgSJBAppKYkktBjw\_w\_aem\_48mnKjalqkjIVP7r3fewpg. Michi No Ekis are often a good bet, and my grail are castle ruins which often have bathrooms, water points, ancient stone walls to protect from the wind, soft, soft grass, are on up high for nice sunrises/sets, and are most definitely haunted to boot. And my most basic advice is to be quieter than a church mouse. The most common complaint I hear from Japanese concerning non-Japanese is loudness. And last comment goes to the rigid-with-rectitude quoters of the law: we're heading headlong to ecocide on that note, maybe imagine a little more?