12/14] Rebuilding the Edo Castle Keep to Re-Grow Japan Tsunagi Corporation, Connecting Culture to Future Generations
Tsunagi Corporation sponsors a symposium for a project to connect culture to future generations.
株式会社繋
TSUNAGU Inc. (headquartered in Chiyoda-ku, Tokyo; Masahiro Oiwa, President) sympathizes with the "Rebuilding the Edo Castle Keep" project promoted by IKIZAMA, a general incorporated association, and has sponsored a symposium to be held at Meiji University Liberty Hall on December 14, 2025 (Sunday). We support this historical challenge to leave behind a cultural asset that future generations can be proud of and to revitalize Japan once again, and we aim to increase the momentum for this project.

Edo Castle Reconstruction Character Message
Outline of the symposium】 【Outline of the symposium
Date: Sunday, December 14, 2025
Time: 12:00 Registration 13:00 Opening, 17:00 Closing
Place: Liberty Hall, Meiji University
For more details and registration for the symposium, please visit
The Challenge of Connecting the Spirit of Edo to the Future and to Japan's Renewed Growth
There are aspects of Japan's cultural assets that are of high value in the eyes of the world, but have not been fully reappraised due to their complex history and the constraints of urban development. The Edo Castle tower, in particular, is a symbol of Japanese history, but it has not been rebuilt for more than 300 years.
In recent years, however, it has become clear both in Japan and abroad that "restoration of cultural assets" can have a significant ripple effect on tourism and local economies. In cases such as Kyoto, Nara, and Kumamoto Castle, it has been confirmed that cultural restoration attracts millions of visitors annually and revitalizes local industries.
The reconstruction of the Edo Castle tower is a good example,
Fusion of history and modernity in the center of Japan, Tokyo
Inherit Japan's identity to the future
To revitalize tourism and the economy
The reconstruction of the Edo Castle tower is of great social significance.

Edo Castle Tenshukudai

Edo Castle
We at TSUNAGU Inc. have been focusing our efforts on regional revitalization and the creation of a network of business managers. Based on this experience, we are convinced that this project will become "a symbol of revitalizing Japan again.
The more managers who take action, the more Japan will surely be dynamic again.
TSUNAGU Inc. supports this project as the first step toward this goal.
Background of our support for the symposium and our social mission
There are three reasons for TSUNAGU's support of this project.
(1) Passing on culture to future generations
The reconstruction of Edo Castle is not merely a historical restoration, but a "reconstruction of Japan's cultural future. By restoring a lost symbol, we can show the younger generation an identity to be proud of.
(2) The project must contribute to regional revitalization.
The revival of a historical landmark in the heart of Tokyo will enhance the value of the tourism industry and surrounding areas, creating a new economic cycle. This is in line with our philosophy of working for regional revitalization.
This symposium is,
Current status and prospects of the reconstruction of Edo Castle
Discussion by experts in technology, history, and urban planning
Interaction with supporters and endorsers
This symposium will be a major step toward the re-growth of Japan.
We will leave behind a culture we can be proud of for future generations - a statement of our intention as business managers.
We regard our sponsorship as a strong statement of our intention to "pass on our culture to future generations," rather than as mere support.
Mr. Oiwa commented as follows.
It is our responsibility as business leaders to revitalize Japan and leave a "proud Japan" to future generations. The reconstruction of the Edo Castle tower is a project that symbolizes Japan's renewed growth in terms of culture, economy, and education. We have decided to support this project as an investment in the next generation."
Edo Castle is more than just a building.
It is a symbol of the creativity, diversity, and innovation of the great city of Edo.
We, as business leaders, must now have the will to connect history to the future,
Japan's momentum for renewed growth will increase.
More managers will take action.
Society as a whole will become more future-oriented.
We believe that we can realize this trend.
Company Profile
Company name: TSUNAGU Inc. (https://www.tsng.co.jp)
Address: Fukuke Bldg. 6F, 2-8-17 Kandasudacho, Chiyoda-ku, Tokyo 101-0041, Japan
Representative: Masahiro Oiwa, Representative Director
Business: System consulting
System development, maintenance and operation support
Support for system risk countermeasures
Number of employees: 5

Tsunagi Corporation
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