Abstract
This report presents a restorative digital study of the Tsutenkyo Bridge area in Koishikawa Korakuen Garden, a representative Edo-period stroll garden. A lightweight 3D landscape model was developed from precise 2D CAD and 1 m contour data derived from point-cloud surveys. Using SketchUp Pro, each structural element was componentized for efficient editing and visual collaboration. Landscape simulations clarified the original “miniature Arashiyama” composition as viewed from key points such as Togetsukyo Bridge. Based on this analysis, restoration goals and vegetation management methods—selective pruning, removal of volunteer trees, and adaptive thinning of background forests—were proposed to recover the intended spatial depth while harmonizing with today's urban context. The study demonstrates that 3D modeling enhances communication among designers and enables objective spatial analysis. This approach contributes to the practical use of digital archives for restoration design, heritage landscape management, and educational applications.
