From Korakuen Stadium to Tokyo Dome
Korakuen Stadium, the predecessor of Tokyo Dome, was a historic ballpark that opened in 1937. With an initial capacity of approximately 35,000, it supported Japanese baseball culture from the sport's earliest professional days. As the long-standing home of the Yomiuri Giants, the stadium was packed to capacity during the 1960s-70s when media exposure drove attendance dominated the game. By the 1970s, however, the steel structure had deteriorated significantly, and revenue losses from rain cancellations were reaching hundreds of millions of yen annually. Cramped seating and the absence of climate control further diminished the spectator experience. In the early 1980s, Korakuen Corporation's management began seriously exploring a rebuild into an all-weather dome stadium. At the time, North American venues such as the Houston Astrodome (opened 1965) and Minneapolis's Metrodome (opened 1982) had proven the dome concept viable, and interest in domed stadiums was growing in Japan. Korakuen's plan extended well beyond a simple stadium replacement, envisioning a large-scale redevelopment encompassing the adjacent Korakuen Amusement Park, Korakuen Hall, hotels, and commercial facilities. The total project cost was estimated at roughly 35 billion yen, an extraordinary investment for the era. The new stadium was built not on the site of Korakuen Stadium itself but on the adjacent grounds of the former Korakuen velodrome, allowing Korakuen Stadium to host official games through the 1987 season. The old ballpark was demolished soon after closing at the end of the 1987 season, and Tokyo Dome opened in March 1988. Capacity expanded to approximately 46,000, and its air-supported roof was a first for Japan. How domes changed the game itself is covered in the dome versus outdoor stadium comparison.
The Yomiuri Group's Influence
The Yomiuri Group's influence over Tokyo Dome's construction was decisive. The Yomiuri Giants played the bulk of their home schedule at the venue, drawing crowds far larger than those of any rival club. Backed by this overwhelming drawing power, Yomiuri exerted strong influence from the design phase onward. The dome's seating layout was engineered to maximize revenue from Yomiuri games, with the rake angle of infield seats and the placement of VIP sections behind home plate heavily reflecting Yomiuri's preferences. Even the positioning of broadcast booths and television camera platforms was designed to prioritize Nippon Television's live coverage. The founding family of Yomiuri Shimbun and Korakuen's executive leadership had been connected through personal networks dating back to the prewar era. Controlling Yomiuri games, the stadium's biggest box-office content, gave the Yomiuri side a powerful de facto voice in stadium management decisions. This relationship created a tripartite power structure linking newspaper circulation growth, television ratings, and stadium gate revenue. Nippon Television held near-exclusive broadcasting rights for Yomiuri games, and during the 1980s, Yomiuri night-game broadcasts consistently drew high ratings. From in-stadium advertising boards and public-address announcements to concession stand operations, the Yomiuri Group's preferences permeated every aspect of the venue. Furthermore, the Yomiuri Group had a keen interest in real estate development around the stadium. The area developed as Tokyo Dome City housed tenants affiliated with Yomiuri-linked enterprises, forming a commercial zone anchored by the ballpark. On Yomiuri game days, sales at surrounding restaurants and hotels surged, and this economic ripple effect further strengthened Yomiuri's bargaining position in a self-reinforcing cycle.
Dome Monopoly and Exclusion of Other Teams
After Tokyo Dome opened, the Yomiuri Giants effectively treated it as their exclusive home. The Nippon-Ham Fighters also designated Tokyo Dome as their home stadium from 1988, but a stark disparity existed between the two tenants. Yomiuri games were given priority scheduling on weekends and holidays with marquee matchups, while Nippon-Ham was relegated to less favorable weekday slots. The gap was starkly reflected in attendance: Yomiuri games filled the stands, whereas Nippon-Ham home dates often played out in front of large blocks of empty seats. As a tenant without a ballpark of its own, the club paid a fee for every date and owed the operator a share of concession revenue on top of it, so much of the value its games created flowed to the stadium side. The Yomiuri could easily recoup these costs through their massive attendance and broadcasting revenue, but for Nippon-Ham the financial burden was severe. Moreover, in-stadium advertising space and signboard placement were designed around Yomiuri games, leaving Nippon-Ham scrambling to secure sponsors for their own home dates. This inequitable structure was a major factor behind Nippon-Ham's decision to relocate to Sapporo, Hokkaido, in 2004. After the move, the Fighters built a distinct fan base at Sapporo Dome and dramatically increased attendance. This success vividly demonstrated how profoundly stadium conditions can affect a franchise's fortunes. The structure in which the Yomiuri Group wielded influence over both the stadium and its own team drew sustained criticism for distorting fair competition across NPB. Pacific League team owners voiced concerns that Yomiuri's stadium dominance was undermining competitive balance between the leagues.
Mitsui Fudosan's Acquisition and Change
In November 2020, Mitsui Fudosan launched a tender offer for Tokyo Dome Corporation (formerly Korakuen Corporation), completing its acquisition as a wholly owned subsidiary in January 2021. The deal covered the ballpark together with the surrounding district, and it drew wide attention as a case in which ownership of a major Japanese sports facility changed hands. The backdrop to this deal was a shareholder proposal by Hong Kong-based activist fund Oasis Management, which argued that Tokyo Dome's asset value was not being fully leveraged by incumbent management and demanded a leadership overhaul. Mitsui Fudosan's entry brought structural change to the relationship between the Yomiuri Group and Korakuen that had endured for more than half a century. Mitsui Fudosan positioned Tokyo Dome City as a hub for mixed-use urban development, unveiling plans for an integrated redevelopment of the stadium, hotels, commercial facilities, and office space. Renovation work that began in phases from 2023 has included a complete overhaul of seating, widened concourses, and the creation of new VIP areas. Nevertheless, the Yomiuri Giants remain the venue's largest tenant, and the foot traffic generated by a full home schedule is indispensable to Mitsui Fudosan's commercial strategy. Yomiuri's influence has not been entirely eliminated, and the power dynamic between the two parties over stadium operations rests on a delicate balance. Mitsui Fudosan aims to expand multi-purpose use of the venue for concerts, exhibitions, and other events to reduce dependence on any single tenant. Tokyo Dome's future hinges on striking the right balance between its public role as a sports facility and its profitability as a commercial property, and on how the relationship with the Yomiuri Group is redefined going forward.
Stadiums and Power - The Politics of Facilities in NPB
Tokyo Dome's history vividly illustrates that stadiums are not merely sports venues but political spaces where power and vested interests converge. The triangular relationship among stadium owners, operators, and tenant teams has directly shaped NPB's power map. The structure in which Yomiuri held sway over both the stadium and its own franchise was a persistent impediment to fair competition and has been repeatedly debated as a governance issue within NPB. In recent years, a compelling counter-model has emerged in the form of team-driven stadium development. ES CON Field Hokkaido, which opened in 2023, was designed as a "ballpark" built and operated by the Hokkaido Nippon-Ham Fighters themselves. With a total project investment of roughly 60 billion yen, the facility presented a new paradigm for community-centered development anchored by a ballpark. By managing everything from design to daily operations, the franchise directly captures ticket revenue, food and beverage sales, advertising income, and real estate returns. ES CON Field's success has proven how critical it is for a team to control its own venue. Kyocera Dome Osaka, home of the Orix Buffaloes, was built and run by an Osaka City-led semi-public corporation, but after the operator went bankrupt, an Orix-group company took it over in 2006, shifting control of stadium operations to the club side. In contrast, the PayPay Dome in Fukuoka (now Mizuho PayPay Dome Fukuoka), home of the Fukuoka SoftBank Hawks, represents a pioneering case in which the SoftBank Group secured stadium operating rights and achieved integrated management of team and venue. Running the ballpark and its surrounding facilities as a single business generates the earning power that underwrites the Hawks' aggressive player acquisitions. The lesson embodied by Tokyo Dome - that a stadium's owner can dictate a franchise's fate - is critically important for any discussion of NPB governance. When the relationship between stadium and team is not equitable, the competitive strength of the entire league suffers. Building an environment in which all twelve franchises can compete on a level playing field requires a fundamental reexamination of stadium ownership and operating structures. Tokyo Dome's history should serve as the starting point for that conversation.