From 1950 to 1978, it served as the home ballpark of the Nishitetsu Lions, a team in Nippon Professional Baseball's (NPB) Pacific League.

It also briefly served as the home stadium for NPB teams the Nishi Nippon Pirates in 1950 and the Fukuoka Daiei Hawks from 1989 to 1992.

For NPB's inaugural season, the Central League's newly created Nishi Nippon Pirates used Heiwadai Stadium as its home.

After the Lions began winning Japan Series championships two seasons later, Nishitetsu dramatically modernized the stadium in 1958 by completely renovating the seating areas, increasing its capacity from 24,000 to 34,000, and adding locker rooms.

The outfield bleachers were left standing as archeological work on the ruins continued nearby until they were demolished in 2008 due to safety concerns.

After World War II, the former site of Fukuoka Castle and later the 24th Infantry Regiment of the 12th Division of the Imperial Japanese Army was requisitioned by the Supreme Commander for the Allied Powers (SCAP) to construct dormitories.

[citation needed] Later that same year, on December 18, the stadium hosted its first event, an exhibition game between the Yomiuri Giants and the Osaka Tigers.

For NPB's inaugural season, the CL's newly created Nishi Nippon Pirates used Heiwadai Stadium as its home.

Additionally, the PL's newly created Nishitetsu Clippers used it as a semi-home in conjunction with Kasugabaru Stadium in Kasuga, Fukuoka.

At 18:46 pm, with the Lions leading 5–4 in the bottom of the fourth inning, Mainichi began to overtly stall in an attempt to force a "no-game".

[5] The Lions scored four more runs in the fourth inning and before the top of fifth, with the Orions trailing 4–9, Mainichi manager Yoshio Yuasa insisted that he could not continue.

[2] During a game against the Daiei Stars on August 29, 1953, Lions' infielder Futoshi Nakanishi hit a home run to center field off of Yoshikazu Hayashi that cleared the outfield stands and left the stadium.

[8] For the 1956 Japan Series against the Yomiuri Giants, temporary stands were constructed and infield seating was added to increase the stadium's capacity and help meet fan demand.

[11] As Heiwadai was managed by the city of Fukuoka,[10] Nishitetsu requested and acquired permission to proceed with the renovations following the conclusion of the 1957 season.

In 1969, a game-fixing and gambling conspiracy dubbed the Black Mist Scandal was uncovered and resulted in several key Lions players being suspended or banned from baseball.

When the two teams next played on June 1 at Heiwadai Stadium, the Lions lost prompting fans to throw bottles of liquor onto the field.

The animosity between the two teams continued the following season and again, on May 23, fans stormed the field at Heiwadai and Lotte again left in an armored bus.

The field was converted to artificial turf in April 1979, and starting that same year, various Central and Pacific League teams held 28 countryside games there on average annually.

[19] However, after the remains of the Korokan, an ancient lodging facility for foreign visitors, were discovered under the bleachers during renovations in December 1987, the city planned to excavate the ruins and redevelop the site into a historical park.

[20] Excavation at the site was completed in 2013 and the stadium's former footprint was eventually developed into a plaza lawn named Korokan Square and opened to the public in 2016.

At the first Lions Classic event in 2008, stone from the stadium's outfield wall was displayed outside of Seibu Dome during a series devoted to Heiwadai against the Hawks.

When the Japanese military was disbanded following World War II, the ruins of the castle were left as one of the few, large open areas within the city of Fukuoka.