If you are watching the older "Second Season" (which covers the Fall Tournament), episode 4 is titled "".
: The quarterfinal matchups begin as teams compete for a spot in the Top 4. Narumiya Mei of Inashiro Industrial dominates against Seiko High. Meanwhile, Seido prepares to face Sosei High, with Furuya Satoru taking the mound as the starting pitcher. Watch Diamond no Ace: Second Season Episode 4 f...
: You can stream this episode legally on Muse Philippines' YouTube Channel or mewatch in supported regions. Ace of the Diamond - Season 2 (2015) If you are watching the older "Second Season"
The most recent episode 4, titled "," premiered on April 26, 2026 . Meanwhile, Seido prepares to face Sosei High, with
The fourth episode of Diamond no Ace (Ace of Diamond) can refer to different seasons depending on which part of the series you are currently watching.