When does Ace of Diamond Act II Season 2 Part 2 premiere? Madhouse listed October 2026 for the continuation of Eijun Sawamura's Seidou run.
Current target date: Thursday, October 1, 2026 (Part 2 premiere). We update this page when studios or publishers move the window.
Ace of Diamond Act II Season 2 Part 2 is listed for October 2026 — Sawamura's Seidou run continues on Madhouse's sports calendar.
Part 2 premiere
Thursday, October 1, 2026
October 2026 is a second-cour return — the first half already finished in June
Ace of Diamond Act II Second Season’s first cour ended June 28, 2026. Staff then locked the second cours for October on TV Tokyo and AT-X, with GLAY on the opening and OxT on the ending. This countdown is for that autumn return, not for the April 2026 soft launch of the season.
If your memory still says Madhouse, update the studio credit
Classic Daiya no A and Act II TV were Madhouse territory. Act II Second Season is OLM, directed by Hideaki Ōba, with Yasukazu Shōji on character design and Kenji Konuta back on series scripts. October’s cour is the same production line as the spring half — just not the old Madhouse pipeline.
How this October slot sits on the franchise clock
- Act II (2019–2020): Madhouse’s 52-episode Act II run ends the previous TV era.
- Second Season cour 1 (Spring 2026): OLM revival; first cour closes June 28, 2026.
- Cour 2 (October 2026): this page — Seidou vs Inashiro continuation on TXN / AT-X.
The mound changed studios — OLM inherited Seidou after Madhouse’s Act II era
Baseball anime fans still autocomplete “Ace of Diamond” with Madhouse. The 2026 Second Season broke that habit: new director, new character designer, OLM on animation, same Konuta scripts and Hyakkoku music. October’s Part 2 is where that handoff either proves itself on the Inashiro final or becomes the footnote every sports-anime thread argues about.
Frequently asked questions
Quick answers about this release date.
1When does Ace of Diamond Act II Season 2 Part 2 air?
October 2026 on TV Tokyo Network (TXN), AT-X, and other listed stations. Staff confirmed the second-cour month; a single-day premiere stamp may still tighten closer to broadcast.
2Is Madhouse still producing this season?
No for Act II Second Season. Animation moved to OLM under director Hideaki Ōba. Madhouse handled earlier Ace of Diamond / Act II TV runs — treating October 2026 as “another Madhouse cour” is outdated.
3Is this a new season or the second half of the current one?
It is the second cours of Ace of Diamond Act II Second Season — the continuation after the first cour wrapped on June 28, 2026. Marketing may say “Season 2 Part 2”; the story picks up mid-arc rather than soft-rebooting the cast.
4What match does Part 2 continue?
Official materials frame the return around Seidou High versus Inashiro Industrial — Miyuki and Narumiya’s rivalry is the visual hook. Expect the autumn cour to finish that tournament confrontation, not open a random side story.
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