Mitsui Ranch Preserve – Mitsui Ranch Preserve The 632acre Mitsui Ranch is a property owned and operated by the Sonoma Mountain Ranch Preservation Foundation a 501c3 organization committed to preserving the natural beauty and biodiversity of the ranch and to developing grazing practices and management activities that preserve steward and enhance ecosystem function preserveenhance habitat for several specialstatus species present there and provide education and guidance through research for the preservation and enhancement of agricultural natural scenic and open oak savanna. The Mitsui Ranch is subject to a Deed of Conservation Easement held by The Nature Conservancy an IRC Section 501cX3 organization. As part of the easement The Nature Conservancy has the right to protect preserve enhance and restore the natural habitat to study and make scientific observations of the ecosystems and native species. The relationship of the Foundation activities to the activities of other conservation organizations is enhanced because the Mitsui Ranch is immediately adjacent to three protected properties owned by government entities including the North Sonoma Mountain County Park Sonoma County Parks District the Lafferty Ranch City of Petaluma and Jack London State Historic Park State of California.