2026 Miyanodai Children's Park Splash Pool Full-Day Course

Miyanodai Children's Park in Nakano Ward has a free water play spot open in summer called Miyanodai Children's Park Splash Pool. In 2026 it operates from Saturday, July 18 through Sunday, August 16, from 10:00 to 16:00. It runs in two sessions, 10:00-12:00 and 13:00-16:00, and is closed at midday for changeover. The pool covers 28.8 square meters with a depth of about 30 centimeters, just right for small children to crouch and play in. The water is tap water, refreshed daily and treated with chlorine, so it is safe and hygienic to step into. It is closed on rainy days and when the water temperature falls to 22 degrees Celsius or below, so check the weather on the day. The venue is Miyanodai Children's Park Splash Pool in Nakano Ward, and admission is free. In the morning, walk around Nabeyayokocho in Shin-Nakano to pick up lunch, then spread it out in the shade of Momijiyama Park next to Nakano ZERO. Head to the water play in time for the afternoon session — an easy neighborhood outing that works entirely by train and on foot.