10周年記念事業

Overview of the Stadium

Overview of the facility

Events Track and field, football, rugby, American football, cultural and entertainment events, and others
Track Class-1 certified all weather track: 400m x 9 lanes, Urethane surface
Field Natural grass (107 x 72m)
Spectator seats 2 tiers (all seats with back supports)
Capacity 72,327 (34,371 in the Lower Stand, 37,956 in the Upper Stand)
Nighttime event illumination Approx. 1,500-lux (2,000-lux in front of goals)
Large screens 2 units, Size: 19 x 9m (837 inches)
Air running hi-vision camera Travels 100m in 7 seconds
Broadcasting booths 10
Parkings for TV relay vehicles 8 cars (for 2 TV stations)
TV camera installation points 20 locations

Ideal viewing

With 72,327 seats, the stadium has the largest spectator capacity in Japan. All the seats are individually sectioned with 90cm of space between rows, so spectators can sit back and enjoy the games in comfort. To ensure that spectators do not miss any of the drama, large screens are installed on both Side Stands for instant replays of outstanding plays and scores. Additionally, the sound coming from the 528 loudspeakers adds emotion and excitement to the game. Three quarters of the seating area is covered by a large roof.
With 72,327 seats, the largest in Japan
All the seats are individually sectioned with 90cm of space between rows.
There are drink holders on each seat and railings on all the stairways.
Lower Stand  Lower Stand
Two large screens
2 large screens of 19 x 9m are installed on both Side Stands.
The dynamic image on the screen can be viewed from all the seats.
Large screen Large screen
The first air running hi-vision camera in the world
Able to travel 100 meters in seven seconds, it can move with athletes and provide dynamic scenes of their play.
Air running hi-vision camera camera  Air running hi-vision camera
Unification of the seats and the field
The Upper Stand overhangs the Lower Stand by 10m, thereby reducing the distance between the seats and the field.
The Upper Stand has an incline of 30 degrees to give the spectators the best possible view.
The front row is positioned 75cm above the level of the field to give spectators a ringside seat for watching the track and field competitions at the same level as the athletes.
Back stand Back stand
528 constant directivity loudspeakers
The speakers have been distributed so as to obtain the best sound quality possible.

Ideal playing conditions

Our greatest pride is of course, the natural grass. The groundskeepers work hard throughout the year to keep the grass in top condition for playing and take extreme care in planting summer and winter grasses. Other characteristics of the stadium include the positioning of the lights placed to avoid the formation of shadows of the players and the reduced wind effect, thanks to the roof that covers three quarters of the spectator seats.
The secrets of an evergreen grass
There is a structure similar to a flowerpot at the depth of 80cm under the grass, and under it there is a hollow space.
At the depth of 30cm, there are pipes of hot water that help to regulate temperature.

Cross-section of the ground  Cross-section of the ground  Grass  Grass
Athletes and spectators at the same level
The front row is situated 75cm above the level of the field so that the athletes sense the spectators near them.(generally 2m)
Field and stand Field and stand
Illumination system made up of 824 lamps
The lights are placed so as to avoid the formation of shadows of the players.
In professional football, the nighttime lighting is 1,500-lux, 2,000-lux in front of the goals.
Night game lighting Night game lighting
Reduced wind effect
The roof covering three quarters of the spectators' seats considerably reduces the effect of the wind.
Roof Roof

Ideal news reporting facilities

There are coaxial and optical fiber cables installed among the broadcast rooms, the relay van parking and the parabolic antenna site in order to make any radio or TV broadcasts possible without the need for wiring the facilities. The 288 seats for press are protected from the rain by a movable roof, and it is possible to send and receive data by connecting faxes and computers to the jacks provided. Additionally, and responding to the demands of the press companies, we have been improving the information infrastructure to make it even easier and more practical to use.
Rich information structure
Besides ideal camera positions to capture the best of the football and athletics competitions, there are coaxial and optical fiber cables installed among the broadcast rooms, in the production compound and in the parabolic antenna site.
There are coaxial cables for electrical microwave transmission between the highest part of the stand and the production compound for satellite transmission.
It is possible to send and receive data by fax or computer on all the 288 press seats.
Press seats  Press seats
Interview room with capacity of 350
Besides a press lounge and rooms for the press, there is an interview room accommodating 350 journalists at a time.
Interview room Interview room
Movable roof
With a total length of 146m, it has a movable and a static part.
It can extend to as much as 5.5m, covering all of the press and VIP seats.
Movable roof Movable roof

Friendly to people and the environment

There are 147 permanent seats for wheelchairs. If necessary, it is possible to have as many as 632 wheelchair places using seats designed specially for this purpose. Water for flushing the toilets and other facilities is a combination of rainwater collected from the roof and treated and recycled waste water. The roof and the walls are fitted up with sound-absorbing panels and all the lights are placed under the roof so as to avoid the emission of light to the outside.
147 permanent seats for wheelchairs
485 general seats can also be converted temporarily for use with wheelchairs.
Wheelchair space Wheelchair space
Recycled and rain waters
Rain water collected in the roof is used to sprinkle the grass in the filed.
Treated sewage is used for flushing toilets and watering plants and greenery.
Sprinkler  Sprinkler

Measures to prevent sound leakage
Stainless steel roof specially designed for absorbing sound.
RC sound-absorbing wall (5F)
A sound-absorbing curtain may be installed during events.
Roof Roof

Overview

It took 2 years and 2 months for design and 3 years and 9 months for construction to complete this world-class stadium. The pillars, beams and floors were manufactured in 24 different plants throughout Japan, and were assembled at the construction site in less time using new technologies. The total cost was about 60.3 billion yen.
  Designing period August 1991 - October 1993
  Construction period January 1994 - October 1997
  Inauguration March 1, 1998
  Total cost 60.3 billion yen
Construction Surface area 164,054 m2
   Building area 68,313 m2
   Total floor area 172,758 m2
   Structure Pre-cast, pre-stressed concrete PC compression method
Seven stories above ground
   Height 51.96m at the highest point, 43.86m at the eaves
   Roof Steel structure (solid truss structured steel pipes finished with zinc plating) (Covers 3/4 of the spectator seats)
   Spectator seats Two tiers, 72,327 seats (all sectioned)
- Lower Stand (4th and 5th floor) - 34,371 seats
- Upper Stand (6th and 7th floor) - 37,956 seats
   Space for wheelchairs 147 permanent seats, extra 485 seats to be converted if necessary
Field Certification First-class track approved by the Japan Track and Field Association
  Track 400m, 9 lanes
  Grass field Natural grass (107 x 72m)
  Grass type Tifton 419 (summer grass), Perennial rye grass (winter grass)
  Equipment for the grass Hot water pipes installed 30cm under the grass floor
  Surrounding of the ground 2.5m wide ditch to impede rushing onto the ground (5m long, 3m deep) (separates the ground from the spectator seats)
Facilities for spectators Elevators Inside the stadium (from 4th to 7th floor): 4 elevators, capacity: 20 people
Outside the stadium (from 1st to 4th floor): 4 elevators, capacity: 20 people
3 staff elevators (capacity: 20, 15 and 11 people respectively)
   Toilets 50 locations inside the stadium (378 units for men, 406 for women)
Electrical equipments Receiving system 66kv loop system
  Transformer capacity 6,000kvA
  Contracted energy eREX Co. 3,700kw Power supplied from the garbage incineration plant 1,100kw (Energy supplied from the incineration of garbage. It reaches the stadium through the tunnel cable of the Yokohama Municipal Subway line 3.)
  Emergency supply Emergency electricity generator 2,000kvA
Air conditioning equipments Air conditioning system Single duct system, Air-cooling heat pump package
   Heat supply City gas water cooler/heater, sewage heat pump chiller, and other thermal storage tanks
Sanitary equipments Cold water supply Drinkable water, water for various uses (Recycled wastewater treated in the Kohoku Wastewater Treating Plant is used for field sprinkling, flushing toilets and watering plants.)
  Hot water supply Water heater using city gas (central hot water supply system) Electrical heater (locally)
Special equipment Air running hi-vision camera 1 unit (above the Main Stand)
  Large screens 2 units (one on each Side stand, size 19m x 9m)
  Lightings for sports games 824 lamps In football, the average lighting of the field is approx. 1,500-lux, 2,000-lux in front of each goal.
  Sound equipment 528 speakers
  Rain protection Movable roof (total width 143m, movable part 93m, length 5.5m)
Design management by Matsuda-Hirata / Tohata Architecture Office joint venture

Contractors for the construction
Construction Area (1) / Field construction Takenaka / Nara Construction joint venture
Construction Area (2) Zenidaka / Nippon Tubing Construction joint venture
Construction Area (3) Nippon Kokudo / Watanabe Construction joint venture
Construction Area (4) Sato / Miki Construction joint venture
Artificial foundation (1) Miki / Watanabe Construction joint venture
Artificial foundation (2) Takenaka / Suruga Construction joint venture
Electricity Kinden / Kyoeisha Construction joint venture
Air conditioning Shinnikku / Osawa Construction joint venture
Sanitation facilities Kawamoto / Yamamoto Electricity and Water Works Construction joint venture
Elevators (1) Daiko
Elevators (2) Schindler Elevators
Large screens Toshiba Lighting and Technology Corp.
Spectator seats (1) Kotobuki
Spectator seats (2) Kokuyo
Development of field foundation Taisei Rotec
Development of field surface Nippon Taiiku Shisetsu
Preparation of field grass Sakata no Tane
(C)Yokohama Sports Association. All Rights Reserved.