^"Ontake". Protected Planet. Retrieved 11 June 2021.
^自然公園指定状況一覧 [List of designated natural parks] (PDF) (in Japanese). Nagano Prefecture. Archived from the original (PDF) on 20 June 2012. Retrieved 25 April 2012.
^"Map of natural parks in Nagano Prefecture" (PDF) (in Japanese). Nagano Prefecture. Archived from the original (PDF) on 21 April 2012. Retrieved 25 April 2012.