9 Subway Lines 3D Visualization Web Service Launched: Freely Explore Station Depths and Elevation Differences

A web service called “Tokyo in Cross-Section” that allows free exploration of all 9 Tokyo Metro subway lines in 3D has been released. It visualizes the three-dimensional structure and station depths using actual measurement data from construction drawings. The interactive nature makes it easy to understand the complex layout of the subway system.

📑Table of Contents

1. Overview and Background of Tokyo Cross-Section Map
2. 3D Visualization Features for 9 Lines
3. Data Sources, Elevation Accuracy, and Limitations
4. Operation Methods and Cross-Section Mode
5. Planned Driver’s View Mode Development
6. Significance of the Subway Map and Future Outlook
7. Frequently Asked Questions (FAQ)
8. Comparison Table
9. Summary

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Overview and Background of Tokyo Cross-Section Map

The service visualizing all 9 Tokyo Metro lines in 3D was launched in June 2026. Created by map design specialist @chizutodesign, the official site is https://tokyo-danmenzu.pages.dev. It was featured in Impress Watch’s “Yajiuma no Mori” column, drawing significant attention.

The map is built on construction history and official data rather than mere illustrations, reflecting real elevation measurements. It is useful not only for subway users and rail fans but also for those interested in urban planning and disaster preparedness.

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3D Visualization Features for 9 Lines

All 9 Tokyo Metro lines are rendered in 3D: Ginza, Marunouchi, Hibiya, Tozai, Chiyoda, Hanzomon, Namboku, Fukutoshin, and Mita lines. Controls include left-drag for forward/backward movement, right-drag for rotation, and wheel for zooming. Toggle station names and surface lines on/off as needed.

Hovering over stations pops up elevation and depth information for intuitive understanding. Switching to cross-section mode displays height differences in 2D, making subtle gradients visible with approximately 10x vertical exaggeration.

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Data Sources, Elevation Accuracy, and Limitations

Data draws from the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) railway data (N02), construction longitudinal sections, and the “Tokyo Metro Handbook 2017.” Real measured elevations are based on TP (Tokyo Bay mean sea level).

However, some sections of the Ginza and Namboku lines use estimated values where complete measured data has not been publicly released. Users should be aware of these accuracy limitations, with expectations for future improvements through data updates.

Sources: Official site https://tokyo-danmenzu.pages.dev, Impress Watch article (as of June 22, 2026)

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Operation Methods and Cross-Section Mode

Access https://tokyo-danmenzu.pages.dev directly in a browser to use it. Mouse controls are simple: left button drag for viewpoint movement, right button drag for rotation, scroll wheel for zoom.

Cross-section mode graphs the elevation differences of selected sections in 2D, facilitating comparison of gradients and relative station depths per line. Enabling surface line display helps understand positional relationships with above-ground landmarks.

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Planned Driver’s View Mode Development

Development of a “front view mode” simulating the driver’s perspective along the routes is underway. While no specific release date is set, completion will enable a more immersive experience, adding a driving simulation-like enjoyment of the subway.

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Significance of the Subway Map and Future Outlook

This 3D map provides a new perspective on the subway’s three-dimensional structure for daily use, tourism, and research. Depths and gradients that are hard to grasp from standard route maps become immediately clear.

Future additions may include the front view mode and expansion to other private railways and subways. Increased use of open data is expected to lead to similar services.

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Frequently Asked Questions (FAQ)

Q: Is Tokyo Cross

Section free to use? A: Yes, it is free for anyone via browser with no special account required.

Q: Is the data for Ginza and Namboku lines accurate?

Some sections use estimated values. Complete measured data has not been released for all parts, so these are approximate. Improvements are anticipated in the future.

Q: What is the elevation reference?

Real measured elevations based on TP (Tokyo Bay mean sea level) are used, with vertical exaggeration of about 10 times.

Q: When will the front view mode be released?

It is under development with no confirmed date. Check the official site or Impress articles for updates.

Q: Are other subways or private lines planned?

Currently limited to the 9 Tokyo Metro lines, but expansion is anticipated in the future.

Q: Is it mobile

friendly? A: As a browser-based service, it works on smartphones and tablets, though mouse operation on PC is recommended.

Q: How often is the data updated?

It is based on data at the time of official release. Updates may occur with new construction or major renovations.

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Comparison Table

Item	Content
Lines Covered	All 9 Tokyo Metro lines
Data Reference	TP (Tokyo Bay mean sea level)
Exaggeration	Vertical approx. 10x
Sources	Construction longitudinal sections + MLIT N02
Estimated Lines	Ginza Line, Namboku Line (approximate)

Source: Official site https://tokyo-danmenzu.pages.dev and Impress Watch reporting (June 2026)

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Summary

Tokyo Cross-Section is a valuable tool for experiencing the hidden three-dimensional structure of the subway in 3D. Its strength lies in the accuracy based on real measurements and high operability, appealing to a wide audience from rail enthusiasts to urban researchers. Completion of the front view mode is highly anticipated.