The original park was formed in 1991. This occurred after a Primeval Forest Inventory had called attention to the valuable forests in the area.
A more detailed inventory conducted in the mid-1980s suggested how the boundaries of the park should be established.
Expansion of the park
While this was happening, several valuable forests were logged. A 2008 national park plan proposed expansion of the park. This work is now going ahead at full speed. For example, we are making an inventory of forest fire history, insects, lichens, fish and cultural history in the planned park.