The park was a wooded area. It was planned as a park in 1935 ahead of the 2,600th anniversary of the legendary founding of Japan by Emperor Jimmu, the mythical first emperor of Japan. After Japan was awarded the 1940 Summer Olympics in 1936 it was planned that the Olympic village would have built either here in the Todoroki Gorge area. After the start of the Second Sino-Japanese War in 1937 the Olympics were forfeited to Helsinki in Finland, (the runner-up in the bidding process) but were later cancelled entirely due to World War II.