Diamond no Ace act II -Second Season- returns with its next installment on October 11, 2026. The anime airs at 5:30 PM every Sunday on TV Tokyo's six-station network in Japan; Crunchyroll has added the series to its fall 2026 anime schedule in many regions, including Southeast Asia.
What Is Diamond no Ace, and Why Does Koshien Matter So Much?
Diamond no Ace (Ace of Diamond) is a high school baseball manga by Yuji Terajima, centered on Eijun Sawamura, a pitcher from the countryside who lacks perfect technique but makes up for it with fighting spirit, as he joins the prestigious Seido Gakuen baseball team. Unlike many sports manga that focus only on scoring moments, the series goes deep into competitive psychology, the tactics of pitch-calling between catcher and pitcher, and the pressure of Japan's brutal single-elimination system. act II is the third part of the whole series (after season 1 and act I), continuing Sawamura's journey as he is no longer a rookie but must compete for the official ace position.
Schedule and Production Information
- Premiere: October 11, 2026.
- Japan time slot: 5:30 PM on Sundays on TV Tokyo and affiliated stations.
- Studio: OLM Team Yoshioka.
- Director: Hideaki Oba.
- Series composition: Kenji Konuta.
- Character design: Yasukazu Shoji.
The international release schedule may differ from Japanese TV times. Viewers should check the series page on the licensed service in their own region rather than converting directly from the TV Tokyo time.
How Far Does the New Cour Go?
This part continues Eijun Sawamura's path after he has grown from a pitcher with plenty of potential into a player who must carry greater responsibility on the Seido team. The destination is still Koshien, but the obstacles are strong opponents and the competition for positions within his own lineup.
What makes Diamond no Ace appealing is not only the results of the games. The anime spends a lot of time on pitch-selection tactics, how the catcher reads the batter's psychology, stamina management and the pressure of a single-elimination tournament. That is why small changes in the pitching order or starting lineup matter to the story.
What Does Koshien Mean?
Koshien is the stadium associated with Japan's two major high school baseball tournaments. In school baseball stories, "going to Koshien" is usually the ultimate goal because a team must get through brutal local qualifiers. For Seido, it is not an automatic invitation but something to be won game by game.
Who Returns in the Voice Cast?
Ryota Osaka continues as Eijun Sawamura. The Seido cast and key rivals return to complete act II's important competitive stage. Daisuke Sakuma of Snow Man joins as Shinichiro Saotome, adding a notable character to the new installment.
Do You Need to Watch the Previous Seasons?
Yes. The Second Season continues directly from Sawamura's growth, his relationship with Miyuki and the competition within the team. Newcomers should start with Diamond no Ace, then watch act II in release order to understand why the ace's jersey and the goal of Koshien carry so much weight.
OtaHub's Take
What keeps Diamond no Ace compelling across many seasons, in OtaHub's view, is that the series dares to let its protagonist fail and sit on the bench for long stretches instead of winning constantly in the familiar shounen pattern. That act II keeps putting Sawamura in the position of competing for a place within his own team, rather than only facing outside opponents, is a smart storytelling choice, because the pressure of "losing your place on your own team" often stings more than a simple defeat. If cour 2 maintains the detailed tactical pacing of previous seasons, this remains one of the few school sports anime that treats competitive psychology seriously instead of using it only as a backdrop for impressive pitching.
Primary sources: TV Tokyo, the Diamond no Ace anime website and Crunchyroll's fall 2026 release schedule. Updated September 30, 2026.
