NEWS

NEWS RELEASE

2026.08.28

Creating a new urban space that will change the future of Yurakucho
Construction begins on the new "YURAKUCHO PARK"

The building employs advanced construction techniques, such as circular architecture designed with relocation in mind, and artificial ground structures that utilize the underground structure.

Download the release here.

We would like to inform you that, together with Mitsubishi Estate Co., Ltd., we have issued the following press release today.

Mitsubishi Estate Co., Ltd. will begin construction on September​ ​1, 2026, of "YURAKUCHO PARK," a new development project being undertaken on the former site of the "Yurakucho Building" and "Shin-Yurakucho Building" (approximately 10,000 square meters) in front of Yurakucho Station in Tokyo. Architectural and spatial design will be handled by Mitsubishi Jisho Design Inc.

Instead of immediately constructing a new building after the demolition of the current building, "YURAKUCHO PARK" will utilize the preparation period to connect to the next stage of urban development. It will undertake challenges that can only be realized in this place and during this period, with the concepts of "CHALLENGE," creating a stage to gather and disseminate diverse cultures from Japan and abroad, and "CULTURE," creating a place where hearts are moved, encounters are born, and the foundation for the future is nurtured. With these concepts in mind, it will work to create a new urban space that will "change the future of Yurakucho."

Furthermore, NOT A HOTEL Co., Ltd., which delivers experiences that combine unique architecture by world-renowned architects and creators with personalized services that allow guests to enjoy the charm of the land, will participate in the planning, design, and production of "YURAKUCHO PARK," and will jointly develop its new project "JAPA VALLEY TOKYO." The completion of "YURAKUCHO PARK" and the opening of "JAPA VALLEY TOKYO" are scheduled for 2027.

Mitsubishi Jisho Design, 135 For many years, we have been responsible for urban infrastructure development and Architectural Design in the Marunouchi area, and have worked on numerous epoch-making projects both domestically and internationally. This time, together with Taisei Corporation Corporation, which will be in charge of construction, we will take on advanced architectural methods such as circular architecture designed with relocation in mind, the construction of artificial ground utilizing underground structures, and wooden architecture in fire-prevention zones. In addition, experts in various fields such as lighting design, Landscape architecture, and planting will join us to create a space that combines the appeal of Japanese technology and materials prepared in cooperation with local governments nationwide with diverse cultures from Japan and abroad.

The planned site is in front of Yurakucho Station, an extremely important block in the urban development of the Marunouchi area. Through this project, we will create opportunities for diverse people, cultures, and activities to intersect, explore new possibilities for Yurakucho, and connect them to the next stage of urban development.

▲YURAKUCHO PARK as seen from the entire Marunouchi area.
Located on the former site of the "Yurakucho Building" and "Shin-Yurakucho Building" in front of Yurakucho Station (left side of the image).

■ Features of this project — A challenge to new construction methods in urban development

The construction of "YURAKUCHO PARK" will challenge the status quo with unprecedented design and construction methods in the heart of the city. The main technical features of this project are as follows:

[Development of a subway connection building through the reduction of the Shin-Yurakucho Building]

The Shin-Yurakucho Building (14 floors above ground, 4 floors below ground) has had its above-ground portion completely demolished, but one span connecting to the Tokyo Metro Yurakucho Station D2 exit will be preserved, cut out from the second basement floor to the second above-ground floor. This is part of a "downsizing" project, where only one block with essential functions is structurally separated from the large-scale office building, and the rest is removed. This will maintain the connection to the subway even after the above-ground portion is demolished, ensuring access for visitors during the temporary use period.

Image of the city block as seen from the Yurakucho Station side.
Image illustrating the reduction in size.

■Collaboration with local governments nationwide - Bringing regional resources from Tokyo's gateway to the world

​YURAKUCHO PARK, a stage that brings together and disseminates diverse cultures from Japan and abroad, will also collaborate with local governments across the country. In a public space widely open to visitors, materials and building materials with stories nurtured in Japanese regions will be incorporated, offering visitors from around the world an experience of "the true quality of Japanese materials," including their texture and how they change over time. Specifically, regional resources from 12 local governments will be used for benches, some of the landscaping, and other elements.

Furthermore, Mitsubishi Estate has been working with local governments to promote the attractions of various regions of Japan through its "TOKYO TORCH" project. We will continue this approach at "YURAKUCHO PARK," delivering Japanese craftsmanship through the very materials that make up the space.

①Odate City (Akita Prefecture)Akita cedar⑦Nara PrefectureYoshino cedar
②Tsukuba City (Ibaraki Prefecture)Shiba⑧Masuda City (Shimane Prefecture)Hinoki
③Minakami Town (Gunma Prefecture)Larch⑨Kochi PrefectureTosa cypress
④Yugawara Town (Kanagawa Prefecture)Cherry blossoms and azaleas⑩Niyodogawa Town (Kochi Prefecture)Hinoki
⑤Fuji City (Shizuoka Prefecture)Fuji cypress⑪Yusui Town (Kagoshima Prefecture)Cedar
⑥Hamamatsu City (Shizuoka Prefecture)Tenryu cedar⑫Ishigaki City (Okinawa Prefecture)Ryukyu pine

*Order from north to south

■Project Overview

Data

Construction name

(Tentative name) YURAKUCHO PARK Project New Construction
Location

Yurakucho 1-chome, Chiyoda-ku, Tokyo
Site area

Former site of Shin-Yurakucho Building: Approximately 7,233 m²
Former Yurakucho Building site: approximately 3,551 m²
Structure and number of floors

Wooden (CLT construction)/ S construction, 1st floor above ground
Maximum height

Approximately 5m
Main Applications

Stores (food and beverage, merchandise), event spaces
Planned opening date

2027 (as of August 2026)
Official website

https://marunouchi-portal.com/yurakucho-park
roleCompany Name
Business operatorsMitsubishi Estate Co., Ltd.
Planning, design, and productionNOT A HOTEL Co., Ltd.
Design/ Construction SupervisionMitsubishi Jisho Design Inc.
ConstructionConstruction workTaisei Corporation Corporation
Electrical equipment installation workKandenko Co., Ltd.
Sanitary equipment constructionShiroguchi Research Institute Co., Ltd.
Construction workTatebayashi Industries Co., Ltd.
Construction workA-style Co., Ltd.
Bench installation workSanbutsu Construction Co., Ltd.
artArt installationNomura Co., Ltd.
Landscape DesignExterior landscaping designDAISHIZEN Co., Ltd.
Green Display Co., Ltd.
Lighting DesignExterior and exterior lighting planNosight Co., Ltd.
Operation and ManagementPM services and event space management.Mitsubishi Estate Property Management Co., Ltd.

(For your reference)
As part of its "Marunouchi NEXT Stage" urban development project in the Marunouchi area, Mitsubishi Estate has designated Tokiwabashi and Yurakucho, located on either side of the Marunouchi area, as key development areas.
At Tokiwabashi's "TOKYO TORCH," construction is underway on the "Torch Tower" (scheduled for completion in 2028), which will be the tallest building in Japan. At Yurakucho's "YURAKUCHO PARK," we are challenging ourselves to create an urban space that will unleash people's creativity and foster culture and exchange. We will develop the challenges and value creations that can only be realized during the temporary use period of several years into the future "Yurakucho Building/New Yurakucho Building Redevelopment Plan." In addition, we are working on the reconstruction of Yurakucho through various methods such as temporary use, redevelopment, and renovation of existing buildings, including the redevelopment of the "(Tentative name) Marunouchi 3-1 Project (International Building/Teigeki Building Redevelopment Plan)" and the renewal of the "New International Building."
Furthermore, as one of the initiatives for the "Marunouchi NEXT Stage" in May​ ​2025, we have put forward the "Whole Town Workplace Concept," which views the entire area as a platform and provides initiatives that would be difficult for individual tenant companies to realize on their own.
Press release: https://www.mec.co.jp/news/detail/2025/05/22_mec2500522_machi

<Marunouchi's "Whole Town Workplace" Concept>
 One of the characteristics of the Marunouchi area is, 135 Through community development over many years, we have been working with our customers and
It's the "convenience and integration" that we've built together with various stakeholders.
Based on these characteristics, tenant companies can do things that they cannot achieve with their own offices alone,
We provide support for things that are difficult to achieve through the efforts of individual companies alone, by mobilizing the entire community.
By having the entire area function as a platform, we will improve the quality and efficiency of work.

The idea of a whole town as a workplace.
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