"Sentai Heroes Sukiyaki Force - Gunma no Heiwa o Negau Season" is a comedic action anime that centers around a group of unlikely heroes tasked with protecting the peace of Gunma Prefecture. The story unfolds in a fictionalized version of Gunma, where the Sukiyaki Force, a team of five individuals, is formed to combat a series of bizarre and often humorous threats. Each member of the team is themed around a local ingredient used in sukiyaki, a popular Japanese hot pot dish, reflecting the region's cultural identity.

The main characters include Taro, the beef-themed leader with a strong sense of justice but a tendency to overthink; Negi, the onion-themed strategist who is sharp-witted but emotionally reserved; Shirataki, the konjac-themed martial artist with a calm demeanor and hidden strength; Hakusai, the cabbage-themed mechanic who provides comic relief with her clumsiness and eccentric inventions; and Kinoko, the mushroom-themed archer who is shy but fiercely loyal to the team. Together, they face off against the "Dark Nabemono Syndicate," a group of villains who seek to disrupt Gunma's peace using food-themed weapons and absurd schemes.

The plot is episodic, with each episode featuring a new threat from the syndicate, ranging from giant rampaging vegetables to sentient kitchen utensils. The Sukiyaki Force must use their unique abilities and teamwork to overcome these challenges, often resulting in slapstick humor and over-the-top action sequences. Despite the comedic tone, the series occasionally delves into themes of community, teamwork, and the importance of preserving local traditions. The narrative balances lighthearted moments with heartfelt interactions, particularly as the characters grow closer and learn to appreciate their differences.

Throughout the season, the team faces escalating threats, culminating in a final showdown with the syndicate's leader, who unveils a plan to plunge Gunma into chaos using a massive, food-based weapon. The Sukiyaki Force must rally their strengths and work together to save their home, leading to a climactic battle that tests their resolve and unity. The series concludes with the team reaffirming their commitment to protecting Gunma, leaving the door open for future adventures.