I stayed here for one night on Friday, just before a three-day weekend. Since it was a weekday, there were no other customers, so I was able to relax and enjoy the private room.I pitched a two-room tent on site A, right next to the kitchen, and it was spacious enough to leave plenty of space in the front and back. The ground was compact mountain sand that made it easy to drive the pegs, and even though we had to set up the tent in the rain, it was easy. The sites are separated by fences, and although it was reserved, it felt private and calm.The location is across the river from the main road, and feels like it's in a small mountain valley. The greenery of the trees was beautiful, and the sounds of birds chirping and insects in the morning and evening were soothing.The weather had been heavy rain the day before, and on the day itself it was light rain, and the river was rising, but it wasn't too muddy and I enjoyed it enough to soak in it. It stopped during the night, so the next day it was clear and the riverbed was clearly visible. It is a river that is quite easy to play in with young children as there are many shallow areas.The riverbed can be accessed easily by going down the stairs right behind the tent site.The kitchen and toilets were clean and easy to use.I didn't use the shower, but instead used a nearby artificial hot spring as I received a 100 yen discount coupon for up to 5 people (it was very clean and comfortable).Open bonfires are prohibited. The firewood cost 800 yen, which seemed expensive, but it was dry and easy to handle. However, if you want to use it a lot, you may want to bring your own. I think I saw a large quantity of firewood being sold for around 500 yen at the roadside station in front of the campsite.Also worth mentioning is the sauna. It was great to be able to use it for free from 12pm to 5pm. It was new and clean, and the thermometer read 92 degrees Celsius, so it felt quite authentic. After the sauna, I went into the river, laid down on the riverbank, and repeated the process, feeling refreshed. Before I went, all I thought was, ``Oh, it's there.'' But I felt like it was a good place to go.As for the car noise that other people have commented on, it is true that it is adjacent to the road, so you can hear the sound of cars passing by. However, since I usually live in the city, I didn't really feel it was a negative thing, just that it bothered me.I thought it would be a short time to check in at 12:00 and check out at 11:00, but it was actually quite fulfilling. Next time, I would like to take advantage of early check-in (+1000 yen) and relax more.It is very convenient as it is within 2 hours from Osaka city, the place is very clean, the river environment is good, and you can enjoy the sauna as well, which is the best added value. This is a campsite that I would definitely like to visit again.