Harumi Island Triton Square Tower X

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Height: Architectural 194.9 m / 639 ft
Height: Occupied 183.2 m / 601 ft
Height: To Tip 194.9 m / 639 ft
Height: Helipad 194.9 m / 639 ft
Floors Above Ground 44
Floors Below Ground 4
Tower GFA 125,696 m² / 1,352,980 ft²


Official Name Harumi Island Triton Square Tower X
Name of Complex Triton Square
Other Names Tower X
Structure Type Building
Status Completed
Country Japan
City Tokyo
Street Address & Map 1-8-10 Harumi
Postal Code 104-0053
Building Function office
Structural Material composite
  • Core: Reinforced Concrete
  • Columns: Steel
  • Floor Spanning: Steel
Construction Start 1994
Completion 2001
Rankings Click arrows to view the next taller/shorter buildings
National Ranking #51 Tallest in Japan
City Ranking #33 Tallest in Tokyo

Companies Involved

Design Toshi Kiban Seibi Kodan
Main Contractor Kajima Corporation; Shimizu Corporation

Research Papers

Review of Buckling-Restrained Brace Design and Application to Tall Buildings
Sep 2018 – International Journal of High-Rise Buildings Volume 7 Number 3

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