
Enjoy water play until evening on the floating obstacle course
About this spot
This floating aquatic obstacle course operates in 2026 from July through August, from 9:00 to 17:00 with multiple time slots (regular operation begins Monday, July 27). Floating bridges, trampolines, slides and other obstacle features are linked together on the calm water at Katsuura Seaside Base, so you can play with your sense of balance while sending up plenty of spray. Play is based on wearing a life jacket, so it is set up for children who are not confident swimmers to try alongside a guardian. You can enjoy summer water play that feels distinctly Katsuura, moving your body with the blue sea right there beside you.
Season & hours
Name: 勝浦ウォーターアイランド
Date & time: 7月–8月 9:00–17:00 (複数スロット制、7/27 (Mon)より通常営業)
Venue: 千葉県勝浦市勝浦中央海岸(勝浦シーサイドベース内)
Tips
It is reassuring to check fees, facility details and the day's time slots on the official website before setting out. Bring clothes you do not mind getting wet and a bag to keep your removed clothes and valuables together. Slots can fill up quickly during the busy summer holiday period, so booking early is recommended.
Best time to visit
The noon slot lets you check in before the peak of the crowds and gives you plenty of play time until the 17:00 close
Access & map
Katsuura Chuo Kaigan, Katsuura City, Chiba (inside Katsuura Seaside Base)
Model course featuring this spot

2026 Katsuura Water Island Full-Day Course
Chiba
Explore features & model courses
Like this spot? Sign up free to save it to your own booklet as a plan or a want-to-go.