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List of tallest structures envisioned for Tokyo

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Sky Mile Tower, a 1,700-meter-tall (5,577 ft) skyscraper envisioned to be built in Tokyo Bay.
The Tokyo Tower of Babel would become the tallest man-made structure ever built, with a height of 10 km (6.2 miles).

Tokyo is the most populated of Japan's 47 prefectures. With around 14 million inhabitants in the prefecture and 40 million in the Metropolitan area as of 2024,[1][2] Tokyo ranks among the largest metropolises in the world. Despite Japan being the country with the highest average age globally in 2024 (excluding the city-state of Monaco and Saint Pierre and Miquelon), according to The World Factbook,[3] and experiencing negative population growth,[4] the country underwent a period of rapid population growth after World War II,[5] particularly in the capital, Tokyo. This growth gave rise to several megaprojects aimed at addressing ecological issues and space shortages caused by overpopulation.[6] This article lists visionary megaprojects announced during the 1980s and 1990s, coinciding with Japan's asset price bubble period, as well as more recent projects with heights of 300 meters or more.

Tallest visionary structures

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This table lists visionary construction projects, also referred to as 'visions' by the Council on Tall Buildings and Urban Habitat (CTBUH), with heights of at least 300 meters (984 feet).

Name Height
m (ft) 		Floors Start Finish Location

(Ward)

Notes
Tokyo Tower of Babel 10 km 1969 — — —
X-SEED 4000 4000 800 — — —
TRY-2004 2004 400 — — — [8]
Aeropolis 2001 2001 500 — — —
Sky Mile Tower 1700 — — 2045 — [10]
M.O.T.H.E.R. 1321 220 — — —
The Spiral 1000 200 — — — [12]
Sky City 1000 1000 196 — — —
Hyper Building 1000 — — — — [14]
Millenium Tower 840 180 — 2009 — [15]
DIB-200 800 200 — — — [16][17]
Holonic Tower 600 120 — — — [18]
Shimizu Super High Rise 550 — — — — [19]
W350 350 70 — 2041 Chiyoda
  • Research project that aims to make wooden supertall skyscrapers possible by 2041[20][21][22]

References

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  1. ^ "東京都の人口（推計）|東京都の統計". www.toukei.metro.tokyo.lg.jp. Retrieved 2024-11-09.
  2. ^ "Major Agglomerations of the World - Population Statistics and Maps". www.citypopulation.de. Retrieved 2024-11-09.
  3. ^ "Median age Comparison - The World Factbook". www.cia.gov. Retrieved 2024-11-09.
  4. ^ "Japan Population (2024) - Worldometer". www.worldometers.info. Retrieved 2024-11-09.
  5. ^ Homei, Aya (2016). Brown (ed.). "The Science of Population and Birth Control in Post-War Japan". Wellcome Trust–Funded Monographs and Book Chapters. New York: Routledge. ISBN 978-1-138-90533-7. PMID 28080009. Retrieved 2024-11-09. {{cite journal}}: Cite journal requires |journal= (help); Missing |editor1= (help)
  6. ^ a b "Tokyo Tower of Babel: World's Tallest Building Ever Planned". Malevus. Retrieved November 9, 2024.
  7. ^ "X-SEED 4000". Skyscraper Source Media. Retrieved October 25, 2024.
  8. ^ "TRY-2004". Skyscraper Source Media. Retrieved October 25, 2024.
  9. ^ "Aeropolis 2001". Skyscraper Source Media. Retrieved October 25, 2024.
  10. ^ "Sky Mile Tower". Skyscraper Source Media. Retrieved October 25, 2024.
  11. ^ "M.O.T.H.E.R." Skyscraper Source Media. Retrieved October 25, 2024.
  12. ^ "The Spiral". Skyscraper Source Media. Retrieved October 25, 2024.
  13. ^ "Sky City 1000". Skyscraper Source Media. Retrieved October 25, 2024.
  14. ^ "Hyper Building". Skyscraper Source Media. Retrieved October 25, 2024.
  15. ^ "Millenium Tower". Skyscraper Source Media. Retrieved October 25, 2024.
  16. ^ "Dynamic Intelligent Building". Skyscraper Source Media. Retrieved October 25, 2024.
  17. ^ "Dynamic Intelligent Building". CTBUH. Retrieved October 25, 2024.
  18. ^ "Holonic Tower". Skyscraper Source Media. Retrieved October 25, 2024.
  19. ^ "Shimizu Super High Rise". Skyscraper Source Media. Retrieved October 25, 2024.
  20. ^ "Wooden skyscraper will transform city into forest". Retrieved 25 May 2024.
  21. ^ ""Promote demand for wood in low-rise buildings" says architect of timber supertall concept". 15 May 2023.
  22. ^ "W350 - The Roadmap Of Super High-Rise Timber Building" (PDF). September 2020.
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