A place to go to beat the heat: Kashima Machi is an attractive farming town that has grown in recent years due to a major shopping mall. It is also known for its natural spring-fed pool (嘉島町湧水公園天然プール, Kashima-chō yūsuikōen ten’nen pūru). There are two pools, one shaped like a normal pool and one a bit more natural. They were formed by runoff from Aso meeting an ancient volcanic substrate. You’ll need a car to get there, but there is plenty of free parking. Pack a picnic and the kids and bring inflatable toys! - William https://kumaon.kumamoto.jp/kashima-yuusui-pool