2026 Kasaoka Kodai-no-Oka Sports Park Fureai Plaza Wave Fountain (かさおか古代の丘スポーツ公園 ふれあい広場 ウェーブ噴水): A Full Day Out

A course for spending a full day of play close to home, built around the Wave Fountain at Fureai Plaza in Kasaoka Kodai-no-Oka Sports Park (かさおか古代の丘スポーツ公園 ふれあい広場 ウェーブ噴水) in Kasaoka City. A sculpture stands at the center of Fureai Plaza, and water columns ringed around it rise and fall in turn — a play-focused wave fountain fitted with night lighting. Reading the timing to dash through, or waiting right underneath for a soaking, gives children ways to play that an ordinary fountain cannot. Admission is free and the fountain runs from 10:00 to 16:00. The 2026 operating period has not been announced, so check the Kasaoka City information before you set out. The same park holds a children's plaza with a large dinosaur playset, a campground with 13 sites, a baseball field and sports grounds, so the entire day can be built inside the park. In the morning, visit the Chofukuji Urayama Tomb Cluster (長福寺裏山古墳群) in Yamaguchi, Kasaoka City — the source of the Ancient Hills name — and feel the mound-dotted terrain with your own feet before heading to the park. A day spent playing the Ancient Hills from end to end.