This translation was prepared with AI assistance and reviewed by the editorial team.
The splash pond in Uminonakamichi Seaside Park's Children's Playground is a shallow water-play area for children below elementary-school age. After a delayed opening caused by water-conservation measures, its official 2026 season is July 25 to August 30.
The separate interactive fountain remains closed because of equipment failure with no reopening date announced as of August 10. Families should make sure they are heading to the splash pond and check the park's restriction notice again on the day.
Key information
| Item | Details |
|---|---|
| 2026 season | July 25–August 30 |
| Age | Preschool children; elementary-school age is not eligible |
| Depth | About 5–30 cm |
| Pond fee | Free; normal park admission still applies |
| Clothing | Swimsuit or swimming diaper required; no nude use |
| Nearest entrance | Wonder World Gate and Wonder World parking |
Who can use the pond
The facility is specifically for children younger than elementary-school age. A parent or guardian should remain close even in the shallow sections. Children may wear a swimsuit or swimming diaper; a normal disposable diaper is not suitable. Bring a full change of clothes and a bag for wet items.
- Preschool children only
- Swimsuit or swimming diaper
- Adult supervision at arm's reach
- No nude use
Admission and parking costs
Use of the pond is free, but entry to the national park costs ¥450 for adults aged 15 or older and ¥210 for visitors aged 65 or older; junior-high age and younger enter free. The entrance counter is officially listed as cash only. Standard-car parking is ¥600 per day.
Use the closest gate
Wonder World Gate and Wonder World parking are the closest options. The park is very large, so another entrance can add a long walk with children and wet gear. The Wonder World lots have more than 500 standard-car spaces in total, but summer weekends can still fill and surrounding roads may be congested.
What to bring and current closure
Bring swimwear or a swimming diaper, towels, spare clothes, a waterproof bag, a hat, drinks, sun protection and secure non-slip footwear. The interactive fountain is still closed because of a major equipment fault. Weather, water conditions or maintenance can also change pond access, so review the same-day park notice before setting out.
