Oshiyama Site is an informational website focused on Oshiyama, a community in the headwaters area of the Yahagi River. It shares local stories, historical resources, and practical information for residents and visitors, rather than promoting commercial products or services. Its blog features community-submitted reports on seasonal scenery, wildlife, festivals, shrine ceremonies, local meetings, and everyday events.

The site also serves as a guide to places and heritage in the area. Topics include Oshiyama’s village history, the Oikawa Great Falls, Mt. Oshiyama and its viewpoints, the Oshiyama Daikōdō hall, Mineyama Marishiten Shrine, local stone monuments and Buddhist figures, and Oshiyama Castle. Dedicated pages describe walking routes and access to the mountain from nearby roads, as well as regional traditions such as Kiso Ontake faith. Visitors can explore historical timelines, explanations of religious sites, and blog archives, while navigation and contact information help users find content or get in touch. Overall, Oshiyama Site documents and introduces the area’s landscape, culture, and community life.