Ace of Diamond — Story Arcs & Filler Guide
Episode ranges, plot summaries, and frequently asked questions for every major arc in Ace of Diamond. Updated 2026.
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Ace of the Diamond (Seasons 1-2)
Eps 1–126 · 126 epsHow does Ace of Diamond begin?
Episodes 1-126 (2013-2016, combining the original two broadcast seasons) follow Eijun Sawamura, a country-town pitcher with an unorthodox delivery, as he enrolls at the elite Seidou High School baseball powerhouse and fights for a spot as ace pitcher against far more polished rivals, working toward a berth in the national Koshien tournament.
Act II
Eps 127–178 · 52 epsWhat does Ace of Diamond Act II cover?
Episodes 127-178 (broadcast April 2019-March 2020) continue Sawamura and Seidou's pursuit of Koshien under a new coaching era, escalating the rivalry-driven pitching duels that define the series.
Act II -Second Season- (Cour 1)
Eps 179–191 · 13 epsWhat is Ace of Diamond's most recent season, and how far does it go?
Act II -Second Season- premiered April 5, 2026. Its first cour, episodes 179-191, sends Seidou into the spring invitational at Koshien Stadium and closes on the brink of the Western Tokyo tournament final. A second cour was confirmed for an October 2026 premiere, continuing directly from where cour 1 leaves off.