Used a site with power for 2 nights and 3 days on weekdays in mid-July 2013.All the staff were very kind☺️.I could hear Japanese warblers singing nearby from morning until evening, which was soothing. The entire site is covered in grass (some areas are bald depending on the site). In the morning, the flowers on the lawn were blooming and it was beautiful.I give it a 4 star because the natural environment with wind and sunlight is harsh (sometimes).Check-in starts at 13:00. If the site is vacant, you can start from 9am by paying the day camp fee.Floating rings and beach balls are available for rental in the administration building. One bundle of firewood costs 600 yen. Mosquito coils, Western-style toilets, showers, coin laundry (detergent and fabric softener are not provided, so be prepared), and rock ice are available. There was no ice sheet.The weather was cloudy all the time, as the low pressure system that brought heavy rain had passed, and from the second day onwards, the wind was sometimes quite strong and frightening. The wind direction was also unstable. One of the tarp ropes broke and a chair fell over. The frame of the tent was quite crooked, but we survived. The ground is a little soft, so be careful of the pegs coming off when the wind is strong.If it's sunny, there's no shade.I think the night temperature was around 25°. We recommend wearing long thin pants, a short-sleeved T-shirt, a bath towel over your stomach, and a fan. I rented a fan for 300 yen and an extension cord for 100 yen from the administration building. This time I wanted cool sheets (like N Cool). It was hot and I couldn't sleep much 😥The birds were not noisy from early in the morning.Mosquito coils and insect repellent spray are a must. There were only two of us this time, so we lit mosquito repellent incense in three places, which seemed to be enough, but if there were three or four people, I think it would be better to burn more. To prevent mosquitoes from entering your tent in the morning, prepare a spray or mosquito coil inside your tent.There are crows and dragonflies, although they are not too noisy, so be careful not to leave food unattended.You can buy things at the nearby roadside station or convenience store, but there are A Co-op and Chuo Foods (supermarket) on the island, although they are a little far away.For bathing, we recommend the Katazoegahama Onsen Yuyu Land (530 yen for adults) located next to the campsite. Although the facility is not new, it is well-maintained, and the slightly lukewarm open-air bath is fed by natural hot spring water.There is also Ryuzaki Onsen (730 yen for adults) on the island, which is about 15 minutes by car. This is spacious and also has a dining area.Next time, I want to go there in the fall to read and look at the stars.