Theater G-Rosso's stage has a three-tiered three-dimensional structure consisting of a lower, middle and upper stage. The lower stage is 500mm above the aisle in front of the audience, and the middle stage is a further 1,650mm higher. The upper stage is even higher, with the slightly lower catwalk area still over 6,000mm above the aisle, and the stage near the wall even higher is over 7,500mm.
The three stages are connected by stairs.
There are numerous doors and openings on the stage, allowing performers to enter and exit from a variety of positions.

The middle stage of Theater G-Rosso has a sliding floor that can be opened and closed to create a large opening (maximum 4,500mm square) on the middle stage.
In plays and shows featuring sword fighting, this floor is opened to create an abyss, making it possible for performers to dive in from the upper stage.

• ​When using a sliding opening/closing floor, a dedicated operator is required to operate it.

Theatre G-Rosso is permanently equipped with a 300-inch retractable screen.
There is also a projector for playing videos, allowing you to project images from your computer or DVD onto the screen.

• ​To use the moving function, operation by a dedicated operator is required.

Theater G-Rosso has a variety of curtains.

There is a drop curtain separating the audience seating from the lower stage, and a center curtain separating the lower stage from the middle stage. By closing the center curtain, it is possible to use only the lower stage, making it possible to use for a wide range of events.
There are also wires flying freely around the three-dimensional stage, making dynamic performances possible.

• ​When using wire equipment, operation by a dedicated operator is required.

Theatre G-Rosso is permanently equipped with a large 4K laser light source projector. It can project high-brightness, high-definition images across the entire stage, allowing for unprecedented visual effects.
By bringing in a large screen, you can easily hold events such as preview screenings.

シアターＧロッソは、客席前方からA列、B列とアルファベット順にZ列まで26列あり、客席総数は765席となっています。（消防定員は814名。）これは東京ドームシティ内にあるその他のイベント会場（東京ドーム・Kanadevia Hall・後楽園ホール等）と比べると比較的小さめの会場と言えます。
The seating area is sloped so that you can enjoy the show at your leisure without having to worry about the people sitting in front of you. In addition, each seat is equipped with a cup holder, making it suitable for events where food and drink are allowed.

There is space for three wheelchairs to the right of the rear seating area, so wheelchair access is available.
There is also a two-story room behind the audience seats, with the first floor being the audio/PA room and the second floor being the lighting and video operations room.

There are four dressing rooms for rent in the back yard of Theater G-Rosso, from Dressing Room 1 to Dressing Room 4. Dressing Rooms 1 and 2 are 10m² to 15m², while Dressing Rooms 3 and 4 are twice as large. Dressing Room 3 has a sliding wall in the middle of the room, allowing it to be divided into two rooms. Each dressing room is equipped with a table and chairs, as well as a dressing table, clothes rack, and a TV.
The television image is also connected to the stage, so you can watch what is happening on stage from inside the dressing room.
In addition, the back yard has a smoking room, restrooms with shower rooms, a kitchenette with an ice maker and refrigerator, etc. The stage entrance is adjacent to the Theater G-Rosso understage and the wings of the stage, making it easy to go back and forth between the stage and the dressing rooms.

There is a loading entrance on the upper side of Theater G-Rosso. This loading entrance is located in the Mitsui Real Park Tokyo Dome 2nd Parking Lot (1st basement level) in Tokyo Dome City. Therefore, only vehicles that can pass through the Mitsui Real Park Tokyo Dome 2nd Parking Lot (vehicle height must be 2.0m or less in principle, consultation is required for vehicles over 2.0m) can enter the loading entrance.
In addition, parking is available at Mitsui's Repark Tokyo Dome No. 2 Parking Lot (2nd basement floor), and a service voucher is provided that allows parking for up to 3 cars per day for free. (Application must be made by the specified date.)

The entrance to Theater G-Rosso