Before there was a stadium, there was a red-brick tobacco plant in Naniwa-ku, one of the many structures obliterated during the devastating bombing of Osaka in World War II. The site sat empty until 1950, when it was reborn as Osaka Stadium, a 32,000-capacity ballpark that became the home of the Nankai Hawks. For the next three decades, the Hawks were a Pacific League powerhouse, claiming nine pennants and two Japan Series championships through the 1950s and 1960s. The stadium's location next to Namba Station, one of Osaka's busiest rail hubs, made it the beating heart of the city's baseball culture. Fans poured in from across the Kansai region, filling the stands with the thunder of taiko drums and coordinated chants that defined Japanese baseball.

By the 1980s, the Hawks' fortunes had faded, but Osaka Stadium found a new kind of electricity. On June 14 and 15, 1987, Madonna launched her Who's That Girl World Tour with two sold-out concerts, her first performances ever on Japanese soil. The stadium's concrete bowl, built for fastballs and fly balls, vibrated with an entirely different energy. Just four months later, Michael Jackson concluded the first leg of his Bad World Tour with three consecutive sold-out shows on October 10 through 12. For one extraordinary year, this aging baseball venue in southern Osaka stood at the center of global pop culture. It was a final blaze of glory: the following year, the Hawks' owner passed away, and Daiei Corporation purchased the struggling franchise, relocating them to Fukuoka.

What happened next borders on the surreal. With no baseball team and dwindling purpose, the stadium cycled through uses: an off-track betting parlor, a theater venue, and then, in 1991, a housing trade association leased the entire playing field to display model homes. Construction companies erected complete houses across the diamond, laid out streets between them, installed lampposts, and parked cars in driveways. Viewed from the upper decks, it looked like a suburban neighborhood had been dropped inside a sports arena. The photographer Naoya Hatakeyama captured the scene in 1998, producing images that still circulate as one of Japan's most peculiar architectural moments. It was fitting, in a way: the stadium had always existed on land transformed by force, and now it was transforming again.

Demolition began in 1998, and by 2003 the first phase of Namba Parks opened on the site. Designed by the Jerde Partnership, the complex rejected the standard shopping mall formula in favor of something radical: an eight-level terraced rooftop garden mimicking a natural canyon, complete with tree groves, streams, waterfalls, rock clusters, and ponds, all irrigated by recycled graywater from the restaurants below. The canyon design forms the primary circulation path, with bands of colored stone guiding visitors through what feels like a mountain trail rather than a retail corridor. Final construction wrapped in April 2007. On the eighth floor, an amphitheater was shaped to echo Osaka Stadium's old outfield seating, and a Nankai Hawks Memorial Gallery on the ninth floor preserves the history of the team that once played below. Where wartime rubble became a ballpark, and a ballpark became a model neighborhood, a vertical forest now rises in the heart of Namba.