All of these photographs courtesy of Jim Caumo and Les Duffin.They were taken between 1962 and 1966.
On the park ground stands the beautiful National Taiwan Museum. Their web site is here.
I found this information on Wikipedia: "In 1930 Taiwan's Japanese rulers established a radio station at the site. The station initially housed the Taipei Broadcasting Bureau, an arm of the Government-General Propaganda Bureau's Information Office. The following year the Taiwan Broadcast Association was formed and given responsibility to broadcasts island-wide. The Taihoko Park radio station became the center of broadcast activity for the Association."