OpenTopo Japan Maps the Boulders Between the Guidebooks

Field notes

The site organizes climbing information around visit planning rather than just route names: users can narrow areas by approach time, train access, toilets, parking, rock type, style, grade, seasonality, and sensitivity, then use search or map views. Its Japanese V-scale filter and result sorting by recent updates, problem count, or shortest approach make the database operationally specific. The project also explicitly marks coordinates, access notes, grades, and conditions as potentially incomplete or outdated.