Suigō-Tsukuba Quasi-National Park is a quasi-national park in the Kantō region of Honshū in Japan. It is rated a protected landscape (category V) according to the IUCN. Suigō-Tsukuba Quasi-National Park covers an area in southeast Ibaraki Prefecture and northeast Chiba Prefecture. The park was established on March 3, 1953 to protect natural areas and cultural heritage of Lake Kasumigaura in Ibaraki Prefecture to the north, the Tone River basin on the border of Ibaraki Prefecture and Chiba Prefecture, and the areas around Cape Inubō and Byōbugaura in Chiba Prefecture to the south. In 1969 the areas around Mount Tsukuba and Mount Kaba in Ibaraki Prefecture, not adjacent to other areas of the park, were added to Suigō-Tsukuba.