Special Features

Special Features
Special Features

1 Spread in front of the station is the approximately 4,400 m2 Sola City Plaza
2 View of the Kanda Festival
3 Grassy open space where students gather

Rebirth of the Gateway to the Town

Ochanomizu Sola City is a redevelopment project located in front of the station, so it was designed with the concept "Rebirth of the Gateway to the Town," to achieve an urban development that combines a business center and a center for exchange among the local residents and visitors.
Taisei Corporation has promoted the project from the planning stage as one of the developers, and we have developed the urban function in conjunction with many local parties and have incorporated many environmental measures using the company's technologies.

Rebirth of the Gateway to the Town

Ochanomizu Sola City Building
stands at the front of Ochanomizu Station

Producing a Town for People, Creating a Comfortable Pedestrian Network

The topography of the surrounding area includes a large difference in level, with the highest point at Ochanomizu Station, and there are many steeply sloping roads. Therefore, a flat pedestrian road and connecting bridge were provided connecting the Sola City Plaza (underground plaza) and the nearby urban redevelopment project (Waterras). This has greatly improved the access to JR Ochanomizu Station for the local people. This open underground plaza where many people come and go connects the people with the town. Also, the PCa columns that support the Sola City Plaza use 300 N/mm2 class ultra high strength concrete (Taisei Super-concrete) to ensure an open feeling in Sola City Plaza.

Research and Development Activities

Producing a Town for People, Creating a Comfortable Pedestrian Network

Connecting bridge that joins Ochanomizu Sola City and the urban redevelopment project (Waterras)

Improvement of Barrier-Free Route and Direct Connection with Tokyo Metro Shin-Ochanomizu Station

By installing a new elevator to the Tokyo Metro Shin-Ochanomizu Station platform from within the site, a barrier-free route that was difficult to realize structurally will be provided (scheduled completion August 2013). Ticket gate directly connects to the Sola City Plaza (underground plaza), thereby greatly improving access to the Awajicho direction. In addition, the station from the ticket gate to the ground level, including the elevator and escalators has been made barrier free, improving the convenience of users such as persons using a wheelchair or with a baby cart.

Improvement of Barrier-Free Route and Direct Connection with Tokyo Metro Shin-Ochanomizu Station

Schematic diagram of Tokyo Metro Shin-Ochanomizu Station barrier-free route

A Town Producing New Culture from Various Interactions
Professor Yasushi AOYAMA, Meiji University (former deputy governor of Tokyo) Chairman of Kandasurugadai Local Urban Planning Association
Professor Yasushi AOYAMA, Meiji University (former deputy governor of Tokyo) Chairman of Kandasurugadai Local Urban Planning Association

As a member of the local community of Ochanomizu, I am very pleased with the completion of this project. Urban planning in the 21st century emphasizes that one of the functions of a city is as a place of interaction. In Ochanomizu, various types of people congregate, ranging from students and the elderly, and the area for interaction among people has increased. From these various exchanges information and culture will be born opening up a new age, which will be widely propagated throughout the world. This type of urban development has now started in this area. I am looking forward to Ochanomizu Sola City developing into a base for local exchange and exchange with the world.

Environmentally Friendly Technology and Continuation of History

At Ochanomizu Sola City, we undertook the challenge of positively using unused natural energy and the existing piles, by a balanced combination of various environmental technologies and taking the local environment into consideration. Also, by preserving and reusing stonewalls or bricks that are remains in this area for more than 100 years, the memory and the history of this town is preserved.

The Highest Level of Environmental Performance and Greenery

Ochanomizu Sola City is to obtain the highest level of CASBEE (Comprehensive Assessment System for Built Environment Efficiency), S(Special) rank. As specified by Tokyo Metropolitan Government, a PAL reduction rate*1 of about 35% and an ERR*1 of about 58% have been achieved.*3 The highest class in the Tokyo Metropolitan Government standards, level 3, has been attained in all cases. Excellent environmental performance has been achieved by arranging the core on the south face, the vertical ribs on the east and west faces, the use of low-e glass, and the use of LED lighting in all the rental offices. In this way, energy efficiency and reduction in environmental load, such as reduction in CO₂, etc., are achieved, as well as reduced running cost.
In Ochanomizu Sola City, Japanese zelkova and camphor trees which are familiar in the area were preserved where they were or transplanted and preserved, as a new base of greenery. Also by incorporating above ground greenery and rooftop greenery, etc., a greenery percentage of 45% of the total site area was achieved.

*1 PAL: An index for heat loss through external walls and windows, etc., of a building
*2 ERR: The percentage reduction in primary energy consumed by all the building equipment
*3 The values are for office use in all cases

Preservation of Japanese zelkova and camphor trees on site Holy Resurrection Cathedral visible behind the grass plaza

Preservation of Japanese zelkova and
camphor trees on site

Holy Resurrection Cathedral visible
behind the grass plaza

1 Use of Underground Water around Metro

Water flowing into the Metro station facility is pumped up, and received and used in the building. This is the first time that such a device has been used in an office building in Tokyo. After filtering, the water is used as an air conditioning heat source (use of unused energy). In addition, the water is used to water the plants and as flushing water for the toilets (use of an unused resource).

Use of Underground Water around Metro

Use of underground water flowing into Metro

2 Large Capacity Solar Power Panels

Integral louver type solar power panels have been incorporated as concealed louver service balconies installed on the south side of every floor of the building. In offices in the center of the city, it is difficult to install large-scale solar power generation equipment on the site or on rooftops, but in Ochanomizu Sola City we have achieved the greatest capacity of an office building within Tokyo of 150 kW by installing about 6800 solar power modules on the building wall surface of about 2430 m2.

Large Capacity Solar Power Panels

Integral louver type solar panel

3 Reuse of Existing Piles

In Ochanomizu Sola City, the piles of the existing building before renovation were reused. About 170 existing piles were reused, which is the largest scale of reuse of piles ever in Japan. This resulted in a reduction in the quantity of waste generated associated with refurbishment, and a major reduction in the CO₂ emissions associated with piling construction compared with the case where new piles were installed.

Retention of Historical Assets

The site where Ochanomizu Sola City was constructed is the location of the former residence of Yanosuke Iwasaki, second generation President of Mitsubishi Corporation in the middle of the Meiji era. A brick retaining wall remaining on site from the middle of the Meiji era was reused as a bench and a historical sign. Stone walls on Gunkanyama and Awajizaka were preserved and reused, preserving the memory of the landscape of the locality.
Also, a store that was familiar to the local residents and artists as the "Awajicho Art Gallery," which was completed in 1917 as a book distributers' storage, was relocated and restored as the "Gallery Kura (Storage)."

Historical information sign Gallery Kura

Historical
information sign

Gallery Kura

Communication of the History and Culture of the Locality

"Ocha Navigate" has been created on Sola City Plaza. This includes a "History Gallery" that introduces the history of the Ochanomizu area for each era through old documents and old photographs, and a "walking town/station" in which the walking spots are included on a database and it is possible to simply create an original walking map, etc., in order to introduce the history and culture of Ochanomizu.

Large Capacity Solar Power Panels

Ocha Navigatel

Urban Development is Cooperation with the Locality
Masaaki NAKAMURA, Project Leader, Development Project Department, Urban Development Division
Masaaki NAKAMURA, Project Leader, Development Project Department, Urban Development Division

Six years ago, we started our studies for the scheme by talking to the local Urban Planning Association. By fusing the ideas of many people from the locality with the urban development know-how and the construction and environmental technologies of Taisei Corporation, a new image of the front of Ochanomizu Station was born. After opening, businessmen, students, families, and elderly gathered in Sola City Plaza. This really was the realization of "an environment vibrant with people." Ochanomizu Sola City is one nucleus, and in the future it is expected that the Ochanomizu area will further develop.

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