血の池公園, Historic park in Nagakute, Japan

Chinoike Park is a public green space located in Nagakute city in Aichi Prefecture. It features pine trees, playground equipment, and other recreational facilities within a residential neighborhood.

The pond here was used by Watanabe Moritsuna and other Tokugawa retainers to wash blood from their spears and swords after the Battle of Komaki and Nagakute in 1584. Legend held that the water turned red each year on 9 April, the date of the battle, and the pond was known as Chinoike, the blood pond. It was later filled in and made into a park, which took the pond's name; the pond itself no longer exists.

The name reflects its past connection to warfare, but today local residents use this space as a gathering point for daily recreation and leisure. Families come here regularly to spend time outdoors in their neighborhood.

The park lies in the Shiroshiki district of Nagakute, a short walk from Irugaike Koen Station on the Linimo Line. Nearby are the historic battlefield park and the Nagakute interchange of the Green Road. The former pond was filled in, so the ground is level and easy to cross on foot.

The pine that gave the park its story, the "armour-hanging pine" (yoroi-kake no matsu), no longer stands: the source records only that such a tree once existed at the back of the grounds, where a commander is said to have hung his armour while weapons were washed in the blood pond. The pond itself was later filled in to create the park.