The Seventh Inning Stretch - The American Prototype
The tradition of marking the seventh inning as special originates with MLB's Seventh Inning Stretch. The most famous origin story involves President William Howard Taft standing during the seventh inning of a Washington Senators game in 1910, prompting the entire crowd to rise in respect. While this account is disputed, the convention of the seventh inning as a turning point was well established in American baseball by the early twentieth century and was imported to Japan along with the sport itself.
How 'Lucky Seven' Took Root in Japan
The Western concept of seven as a lucky number permeated postwar Japanese society alongside American cultural influence. In baseball, the seventh inning represents a structural turning point where pitcher changes are most frequent and comeback rallies most likely to begin. NPB game data confirms that a significant proportion of come-from-behind victories involve scoring in the seventh inning or later, reinforcing the Lucky Seventh concept with empirical support.
The Birth of Balloon Releases
The origin of NPB's seventh-inning balloon release is debated. The most widely cited theory credits Hiroshima Carp fans in the late 1970s or early 1980s at the old Hiroshima Municipal Stadium. An alternative theory attributes the practice to Hanshin Tigers fans at Koshien Stadium. By the 1990s, the tradition had spread league-wide. The balloons used are elongated rubber 'jet balloons' that emit a whistling sound as they deflate in flight. Tens of thousands of team-colored balloons ascending simultaneously into the night sky create a visual spectacle unique to NPB.
Bans and Revivals
Balloon releases have faced periodic restrictions. Environmental concerns about rubber debris, potential interference with play, and COVID-19 transmission risks led to a complete ban during the 2020-2021 seasons. The tradition was gradually restored from 2022, though some venues have considered permanent bans for environmental reasons. Tokyo Dome has intermittently prohibited balloons due to the problem of them sticking to the domed ceiling. The debate over balloon releases encapsulates the broader tension between preserving beloved traditions and addressing modern environmental and health concerns.
Team Songs and the Seventh-Inning Ritual
The balloon release is inseparable from each team's signature anthem. Hanshin fans sing 'Rokko Oroshi' as yellow balloons ascend. Yomiuri fans sing 'Tokon Komete,' Hiroshima fans sing 'Sore Yuke Carp,' and SoftBank fans sing 'Iza Yuke Wakataka Gundan.' For fans, the seventh inning represents the emotional peak of the stadium experience. Notably, the ritual extends to visiting fans as well: even in hostile territory, the seventh inning belongs to both sides, an unwritten rule that speaks to the depth of NPB's cheering culture.
A Uniquely Japanese Evolution
MLB's Seventh Inning Stretch features a communal singing of 'Take Me Out to the Ball Game' but no balloon releases. Korea's KBO and Taiwan's CPBL have seventh-inning traditions but nothing as systematized as NPB's balloon spectacle. The practice of releasing tens of thousands of team-colored balloons is an innovation that NPB developed almost entirely on its own, fusing the imported American concept of a special seventh inning with Japan's distinctive cheering culture to create something visually and acoustically overwhelming. The Lucky Seventh balloon release is one of NPB's genuine cultural contributions to world baseball.