The park was intentionally engineered as a 'Disaster Prevention Park,' containing hidden infrastructure for emergency medical services and water supply.
It is divided into several zones, including the 'Wind Plaza,' 'Water Plaza,' and 'Green Plaza,' each designed with specific topography to facilitate evacuation.
The park borders the Arakawa River, one of the primary flood control arteries for Tokyo.
The grounds feature a dedicated 'Field Athletic' area with wooden structures designed for children.
The park acts as a windbreak for the surrounding residential neighborhood, utilizing its dense tree lines.
It sits on land that was repurposed from former industrial and riverfront warehouse zones.
Ōjima-Komatsugawa Park is a large linear riverside park spanning the Arakawa and Kyu-Nakagawa rivers in Koto City. It is a designated disaster-prevention park, designed to serve as a refuge area for local residents during seismic events. The park features an extensive central square, multiple playgrounds, and designated barbecue areas that require prior registration. Spanning over 26 hectares, it links the Arakawa riverbank with diverse recreational facilities. The landscape incorporates a variety of flora, including over 1,000 cherry trees, making it a prominent local destination during the spring blossom season. Several rolling grass hills provide elevated vantage points overlooking the river and the surrounding metropolitan skyline.
The top of the large grassy mound in the central section provides a panoramic view of the river and the Tokyo Skytree.
Register for barbecue pits well in advance through the official online system, as spots fill up quickly on weekends.
Bring a picnic mat, as the large grassy mounds are ideal for lounging but lack built-in seating.
Check the wind conditions before visiting, as the open riverside location can be significantly gustier than the city streets.
Do not attempt to use barbecue facilities without a confirmed reservation, as on-site enforcement is strict.
Barbecue areas are generally closed during the winter months.
Take all trash with you unless using designated disposal areas, and keep noise levels down in areas near residential borders.
