The objectives of the present study are, with regards to land-use and transport including environment, to investigate present situations, to identify issues in the planning and implementation stages, and lastly, to propose subjects to be tackled in order to realize “integrated planning and implementation” of “integrated land-use and transport” in developing metropolises. Following intensive investigations for the cases of the South-East Asian metropolises, the interaction structure is represented as a system which contains markets and governmental agencies. Pigeonholes are then set up to identify issues from the two viewpoints of “land-use and transport” and “planning and implementation”. The identified key issues are further examined from various viewpoints.