The stadium was originally built in 1979 as a roofless facility, with the current dome roof added later in 1999.
The open-air perimeter design means that birds and insects can occasionally enter the stadium bowl during games.
The stadium is built into a natural valley, which explains the unique structural integration with the hillside terrain.
It was formerly known as Seibu Dome before rebranding to Belluna Dome in 2022.
The venue lacks a complete wall enclosure, leading to unique wind patterns that can influence baseball aerodynamics.
The stadium's capacity exceeds 30,000 spectators for baseball events.
Belluna Dome is the home stadium of the Nippon Professional Baseball team, the Saitama Seibu Lions. The venue is uniquely characterized by its semi-open architectural design, featuring a roof that covers the seating area but leaves the perimeter open to the natural surroundings. This design allows for airflow and views of the surrounding hills, though it does not fully enclose the stadium against inclement weather. It is located in the hilly region of Tokorozawa, Saitama. The stadium underwent significant renovations following the 2017 season, resulting in updated concourses and improved seating facilities. It serves as a multi-purpose venue for professional baseball games, concerts, and various community events. The field surface utilizes artificial turf maintained to professional standards.
The upper deck concourse, which offers a wide-angle view of the field framed by the open-air perimeter and the surrounding forest.
Bring a light jacket even in summer, as the open-perimeter design can be breezy or cool during evening games.
Check the official weather forecast, as the semi-open roof does not protect against heavy, wind-blown rain.
Explore the food stalls in the concourse, which often feature localized Saitama delicacies.
Attempting to drive to the stadium during major games, as parking is extremely limited and traffic congestion is significant.
Operations follow the professional baseball season calendar, typically running from spring through autumn; the venue is often inactive or limited to event-specific maintenance during winter months.
Visitors are expected to follow standard Japanese stadium manners, which include not obstructing the view of those behind you and participating in team-specific cheering rituals.
