Ace of the Diamond act II -Second Season- sets October premiere

The second cour of Ace of the Diamond act II -Second Season- will air in October 2026 on TV Tokyo Network and AT-X, with a new teaser visual, GLAY on opening theme and OxT on ending theme. The rollout sets up Seido High School’s championship matchup against Inashiro Industrial High School in the West Tokyo Qualifiers.

Why it matters: - The second cour brings the baseball anime’s story to the championship game, one of the series’ biggest matchups. - GLAY and OxT returning to the franchise adds familiar music tie-ins for longtime fans. - The October 2026 launch keeps the anime on the air as the final summer showdown approaches in the story.

What happened: - Ace of the Diamond act II -Second Season- Cour 2 will premiere in October 2026 on TV Tokyo Network (TXN), AT-X and other broadcasters. - The new teaser visual shows Seido High School catcher Kazuya Miyuki facing Inashiro Industrial High School ace Mei Narumiya. - GLAY will perform the opening theme for Cour 2. - OxT will perform the ending theme for Cour 2. - Both artists have previously contributed songs to the Ace of the Diamond TV anime series.

The details: - Cour 2 covers the championship game of the West Tokyo Qualifiers for the National High School Baseball Championship. - Seido High School advanced after defeating Sanko High School in the semifinals. - Inashiro Industrial High School returns as Seido’s opponent from last year’s final. - Miyuki and Narumiya have known each other since Little League, and the teaser visual plays up that rivalry. - The series is based on Yuji Terajima’s manga, serialized in Kodansha’s Weekly Shonen Magazine. - The anime first aired in 2013 and follows Eijun Sawamura and the Seido baseball team in pursuit of Japan’s high school baseball championship. - The act II sequel aired from 2019 to 2020, and the sequel project was announced in 2024. - Ace of the Diamond act II -Second Season- aired from April to June 2026 before the Cour 2 rollout. - Broadcast dates and times are subject to change without notice.

Between the lines: - The announcement leans on a classic sports-anime formula: a decisive rematch, two star pitchers, and returning theme artists. - Putting Miyuki and Narumiya front and center signals that the final match is being framed as both a team contest and a personal rivalry. - The music lineup and teaser visual suggest the production is positioning Cour 2 as the payoff arc for the broader act II storyline.

What's next: - The anime will begin broadcasting Cour 2 in October 2026 on TV Tokyo’s six-network affiliates, AT-X and other stations. - Fans can expect more story focus on Seido’s championship game against Inashiro Industrial High School. - The official website, X account and Instagram are listed as official links for further updates.

The bottom line: - Ace of the Diamond act II -Second Season- is heading into its marquee baseball showdown, with a fall 2026 premiere, a rivalry-heavy teaser and two returning theme acts.