Historical institutionalism in action: Incremental prevalence of Transit-Oriented Development in Tokyo 1945-1982

Transit-Oriented Development (TOD) increasingly refers to global practices integrating land-use planning, urban development, and transit today, but their historical experiences have received little attention from the discussion, not to mention any theoretical elaboration with institutional thinking. The literature identifies Tokyo as a global exemplar of TOD as a new term for enduring practice. However, why and how Tokyo’s practice uniquely relies on private railway conglomerates remains underexplored. This article elaborates on a historical institutionalist approach using an inductive process tracing technique to understand Tokyo’s postwar history from 1945 to 1982, emphasizing incremental changes induced by endogenous forces. The exploration takes precedent insights into the private railway conglomerate-led TOD practice as an informal institution of “standard operating practice” and refines them with postwar history and supplementary prewar episodes. It finds that contingent policy choices allowed conglomerates to dismantle their geographical and financial constraints from prewar regulations. The actions reinforced their institutional privilege in public affairs as a foundation for subversive railway privatization reforms from 1982 onward. The finding thus identifies a socio-political dimension of TOD shaped by agents across sectors, developing the current methodology in planning studies and contributing to the debates on defining TOD.