Why you should experience Harumi in Tokyo, Japan.
Harumi is a waterfront enclave where Tokyo Bay's twentieth-century reclamation, international exhibition culture, maritime infrastructure and Olympic-scale redevelopment have repeatedly turned newly created ground into a testing ground for metropolitan expansion.
Positioned between Kachidoki, Toyosu, and the waters of Tokyo Bay, the neighborhood occupies reclaimed territory extending south from Tsukishima toward Harumi Wharf. Broad avenues and canals divide large development parcels whose scale differs sharply from the older lanes of neighboring Tsukishima. Exhibition grounds, warehouses and port facilities successively occupied the waterfront before residential towers and public spaces established a new urban form across the former industrial landscape. The result is an enclave where reclaimed geography, maritime Tokyo, large-scale architecture and successive generations of metropolitan ambition remain exceptionally visible.
What you should know about Harumi.
Harumi is best known for developing from reclaimed Tokyo Bay ground into an exhibition district whose successive reinventions track nearly a century of Japanese metropolitan ambition. Reclamation created the land as Tsukishima No. 4 before planners selected it as a principal venue for the Japan International Exposition scheduled for 1940, an enormous national project conceived around celebrations marking the 2,600th anniversary of Japan's imperial chronology. Expanding war in Asia forced postponement of the exposition in 1938 after infrastructure and promotional preparations had begun; unused advance tickets acquired an unusual afterlife when they were accepted decades later at Expo '70 in Osaka and Expo 2005 in Aichi. Harumi returned to large-scale exhibition culture in 1959 when the Tokyo International Trade Fair grounds began hosting trade shows on the reclaimed waterfront. Permanent halls subsequently made the complex Japan's principal exhibition center during the country's postwar economic expansion, and attendance exceeded six million people during its peak period. The Harumi exhibition grounds remained active until 1996, when Tokyo Big Sight opened in Ariake and inherited the international convention role long concentrated here. Harumi's progression from an unrealized 1940 world exposition through nearly four decades of postwar trade fairs established the reclaimed district as one of Tokyo's earliest large-scale stages for presenting Japanese industry and economic growth to international audiences.
Harumi entered another consequential chapter when Tokyo selected approximately 44 hectares of the waterfront for the Olympic and Paralympic Village of the Tokyo 2020 Games. Twenty-one residential buildings were constructed for temporary athlete accommodation, providing 18,000 beds during the Olympics and 8,000 during the Paralympics alongside temporary dining, medical and training facilities. Tokyo Metropolitan Government structured the West Harumi 5-Chome project as an approximately 18-hectare redevelopment whose permanent program combined those 21 converted residential buildings with two approximately 180-meter, 50-story towers and a commercial building. Harumi Flag emerged after the Games with 5,632 residences, 4,145 for sale and 1,487 for rent, and occupancy began in January 2024 before the district formally opened that May. The tower residences began occupancy in September 2025, and more than 11,200 residents were living in Harumi Flag by August 1, 2026, completing the conversion of temporary international athlete housing into one of Central Tokyo's largest new residential communities. The 44-hectare Games site, 21 athlete buildings, 18,000 Olympic beds, two 180-meter towers and 5,632 permanent residences gave Harumi another metropolitan reinvention on ground already shaped by the unrealized 1940 exposition and postwar trade-fair era.
How to fold Harumi into your trip.
Harumi works as the anchor for a waterfront day tracing Tokyo's movable-bridge engineering, postwar redevelopment and surviving maritime infrastructure around the reclaimed islands of Chuo.
Begin at Kachidoki Bridge, completed in 1940 as a double-leaf bascule bridge whose central section opened to accommodate large vessels serving upstream shipyards and warehouses. The crossing was Asia's largest movable bridge at completion and once opened five times daily before declining ship traffic and increasing road use ended regular operation, with the final test opening occurring in 1970. Continue to Harumi Triton Square, developed through the approximately nine-hectare Harumi 1-chome redevelopment and associated with roughly 1,700 residences alongside its major commercial towers. The project carried Harumi beyond its trade-fair period through large-scale residential and office construction tied to the waterfront's late twentieth-century redevelopment. Conclude at Harumi Port Park, where the former Olympic and Paralympic Village waterfront preserves an official Tokyo 2020 legacy installation beside the ground occupied by athletes during the Games. The park places the contemporary shoreline at the culmination of Harumi's long movement from engineered bay ground toward an internationally used residential waterfront. The progression moves from a 1940 movable bridge built for industrial shipping through large-scale postwar waterfront redevelopment into the former Olympic Village shoreline, revealing how transportation engineering, metropolitan construction and international events repeatedly reshaped Harumi.
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