Ace of the Diamond Act II Second Season Comes Back for the Inashiro Grudge Match

Ace of the Diamond fans have been sitting on this one since late June. The first cour of Act II Second Season wrapped on the 28th after thirteen episodes, and it stopped at exactly the point where you do not want a baseball anime to stop: right before the pitch. Seido is standing across the field from Inashiro Industrial with a Koshien qualifying spot on the line, and the anime is only now getting around to letting that game actually happen.

The handoff nobody announced loudly

Here is the detail that matters more than the recap. The studio chair has changed. OLM is animating this cour, with Hideaki Oba stepping in to direct, which marks a shift away from the team that carried the first half of this season. Kenji Konuta stays on as series composer and Yasukazu Shoji continues as character designer, so the writing room and the character work are staying consistent even as the animation studio changes hands.

That kind of mid-season handoff is always a little nerve-wracking for a franchise this established. Ace of the Diamond has been running, in one form or another, since 2013, and the visual language of Seido's pitching staff is baked into a lot of fans' expectations by now. OLM has plenty of sports-anime experience to draw on, but the real test is whether Sawamura's delivery still reads the same on screen when the hands behind it have changed.

Why this particular match is the right one to come back on

If you have forgotten where the story left off, here is the short version: Seido and Inashiro Industrial are not just two schools playing a tournament game. Inashiro has been the measuring stick for this cast since the earliest arcs, the team Seido keeps circling back to as proof of how far they have actually come. Resuming the season on this specific matchup, rather than easing back in with something lower stakes, is the anime betting that its audience remembers exactly why this rivalry matters and does not need a warm-up episode to get reinvested.

For a series that lives and dies on tension between pitches, that is the correct bet. Ace of the Diamond has never been shy about stretching a single inning across an entire episode when the moment calls for it, and a qualification game against Inashiro is exactly the kind of moment that earns the slow burn.

Who is back, and who is new

The returning voices are the ones you would expect for a franchise of this size. Ryota Osaka is back as Eijun Sawamura, Takahiro Sakurai continues as catcher Kazuya Miyuki, Natsuki Hanae returns as Haruichi Kominato, and Nobunaga Shimazaki is back as Satoru Furuya.

The new names this cour are mostly on the Inashiro side of the roster, which tracks with the story resuming the Seido-Inashiro game directly. Shugo Nakamura joins as Koya Urabe, Atsushi Tamaru as Soichi Nagira, Kento Hama as Koji Nara, and Toshiya Miyata, a member of the idol group Kis-My-Ft2, as Koji Chimaru. Rounding out an opposing roster with four new credits in one go signals that Inashiro is getting real screen time this cour rather than functioning as a backdrop for Seido's growth.

The music swap

GLAY takes over the opening theme this cour, with OxT performing the ending. That is a notably different register from a lot of recent sports-anime theme songs, which tend to lean on younger rock or idol-adjacent acts. GLAY bringing their own decades of stadium-rock pedigree to a baseball anime about a team trying to prove it belongs on the biggest stage in Japanese high school sports is, if nothing else, thematically on the nose in a good way.

Where this leaves the season

Japanese broadcast returns in October, with at least one outlet reporting the specific date as Sunday, October 11, streaming through Crunchyroll. Treat that exact date as the best available estimate rather than a locked-in fact, since not every source has confirmed the day down to the hour, but the window itself, October, is solid across every report.

What is not in doubt is the stakes. Seido needs this win to keep its Koshien hopes alive, Inashiro is playing for the same thing, and the anime is handing both teams a deeper bench of named characters than it had going into the break. A new studio taking over mid-arc is always a slight risk for a long-running franchise, but putting the biggest rivalry in the cast's history on deck as the comeback episode is the kind of confidence that suggests OLM and Oba are not treating this as a transitional cour. They are treating it as the one that was always going to matter most.

Rooting for Seido, or still holding a grudge for Inashiro? Bring it to the chat.