NO, it is not finished.
We found unfinished core content:
Diamond no ace: act ii second season (Sequel)
Diamond no ace act ii gaiden: teitou vs. ugumori (Sequel)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Anime - Base
Release date: October 06, 2013
Anime - Sequel
Release date: April 06, 2015
Anime - Sequel
Release date: April 02, 2019
Anime - Sequel
Release date: January 01, 2026
Eijun Sawamura, a passionate but flawed middle school pitcher, suffers a crushing defeat. Unexpectedly scouted by a prestigious high school, Seidou, he's given a chance to pursue his baseball dreams at a much higher level. He accepts, driven by ambition and the encouragement of his friends.
However, life at Seidou is a rude awakening. Surrounded by talented players, including the prodigious fastball pitcher Satoru Furuya, Eijun faces fierce competition. He vows to become the team's ace, but must prove himself worthy amidst the intense pressure and exceptional skill of his peers.
The Seidou baseball team, bolstered by these new additions, sets their sights on becoming the best in Japan. They will face numerous challenging opponents and internal struggles as they strive to achieve their ultimate goal.