2026 Omori Miwa Park Water Play Area: Full-Day Enjoyment Course

Omori Miwa Park (大森三輪公園) in Ota City has a free waterfront facility with flowing water, the Omori Miwa Park Water Play Area (Waterfront Facility) (大森三輪公園 水遊び場（親水施設）). In 2026, it's scheduled to be open from Thursday, April 23 to around Wednesday, September 30, from 10:00 to 16:00. The closing date is not officially announced by the ward, so late September is a rough guide based on past years. It's closed for regular cleaning on August 12, so plan around that day. The water is filtered and disinfected, but is not drinkable. The venue is Omori Miwa Park in Ota City, located within a residential area of Omori. Admission is free. In the morning, head to Iwai Shrine (磐井神社), which stands along the former Tokaido road. It's an old shrine counted among the Shikinaisha, and a legend about a well on its grounds remains today. From there, move on to Heiwa no Mori Park (平和の森公園) and get active on the field athletics course, crossing logs and climbing ropes. After eating a bento in the shade of the lawn, spend the afternoon at the Omori Miwa Park Water Play Area (Waterfront Facility) until it closes at 16:00. Since it opens as early as late April, you can enjoy the water from the pleasant early-summer weather onward. With history, athletics, and water play, it's a day packed full of things for both body and mind.