The name Ohori means a trench and it derives from the fact that Kuroda Nagamasa, the old lord of Fukuoka, reclaimed the land called Kusagae which was facing Hakata Bay and made a trench for the Fukuoka castle.

The present park was re-constructed by Fukuoka City, and reopened in 1929. This park is one of the most beautiful water parks in Japan and loved by local people as a relaxation spot. Fireworks festival is held here in the summer.