Eijun Sawamura is a pitcher who joins an elite school with a brilliant catcher named Kazuya Miyuki. Together with the rest of the team, they strive for Japan's storied Koushien championships through hard work and determination.
You can now watch Ace of Diamond online on the following streaming providers in the United States.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | The One Pitch | 2013-10-06 | 25 min |
| Season 1 | Episode 2 | Partner | 2013-10-13 | 25 min |
| Season 1 | Episode 3 | Not Qualified to Be a Pitcher? | 2013-10-20 | 25 min |
| Season 1 | Episode 4 | Are You Like Me? | 2013-10-27 | 25 min |
| Season 1 | Episode 5 | A Clash | 2013-11-03 | 25 min |
| Season 1 | Episode 6 | Head to Head! | 2013-11-10 | 25 min |
| Season 1 | Episode 7 | The Two Batteries | 2013-11-17 | 25 min |
| Season 1 | Episode 8 | The Truth About Chris | 2013-11-24 | 25 min |
| Season 1 | Episode 9 | With Chagrin in His Heart | 2013-12-01 | 25 min |
| Season 1 | Episode 10 | Hone Your Moving Fastball | 2013-12-08 | 25 min |
| Season 1 | Episode 11 | Chris to the Field | 2013-12-15 | 25 min |
| Season 1 | Episode 12 | Target | 2013-12-22 | 25 min |
| Season 1 | Episode 13 | You're in the First-String | 2013-12-29 | 25 min |
| Season 1 | Episode 14 | Training Camp Begins! | 2014-01-12 | 25 min |
| Season 1 | Episode 15 | Lead with Your Plays! | 2014-01-19 | 25 min |
| Season 1 | Episode 16 | Challenge | 2014-01-26 | 25 min |
| Season 1 | Episode 17 | Games Are Fun | 2014-02-02 | 25 min |
| Season 1 | Episode 18 | I Hate It, But... | 2014-02-09 | 25 min |
| Season 1 | Episode 19 | Fate | 2014-02-16 | 25 min |
| Season 1 | Episode 20 | Emergency | 2014-02-23 | 25 min |
| Season 1 | Episode 21 | To the Dream Stage | 2014-03-02 | 25 min |
| Season 1 | Episode 22 | Calling for Attention | 2014-03-09 | 25 min |
| Season 1 | Episode 23 | Official Game Debut | 2014-03-16 | 25 min |
| Season 1 | Episode 24 | Precision Machine | 2014-03-23 | 25 min |
| Season 1 | Episode 25 | Anti-Furuya Strategy | 2014-03-30 | 25 min |
| Season 1 | Episode 26 | Miracle Akikawa | 2014-04-06 | 25 min |
| Season 1 | Episode 27 | I'm Not Running | 2014-04-13 | 25 min |
| Season 1 | Episode 28 | Path, Eijun Sawamura to the Scorching Mound | 2014-04-20 | 25 min |
| Season 1 | Episode 29 | Neck and Neck | 2014-04-27 | 25 min |
| Season 1 | Episode 30 | Winner and Loser | 2014-05-04 | 25 min |
| Season 1 | Episode 31 | Dark Horse | 2014-05-11 | 25 min |
| Season 1 | Episode 32 | Summers | 2014-05-18 | 25 min |
| Season 1 | Episode 33 | Money Tree | 2014-05-25 | 25 min |
| Season 1 | Episode 34 | Reliable Teammates | 2014-06-01 | 25 min |
| Season 1 | Episode 35 | Potential | 2014-06-08 | 25 min |
| Season 1 | Episode 36 | The Ace Takes the Mound | 2014-06-15 | 25 min |
| Season 1 | Episode 37 | Burst | 2014-06-29 | 25 min |
| Season 1 | Episode 38 | Roles | 2014-07-06 | 25 min |
| Season 1 | Episode 39 | Expectations of an Ace | 2014-07-13 | 25 min |
| Season 1 | Episode 40 | The Winning Shot | 2014-07-20 | 25 min |
| Season 1 | Episode 41 | It's the Semifinal | 2014-07-27 | 25 min |
| Season 1 | Episode 42 | The Giant Looks Down | 2014-08-03 | 25 min |
| Season 1 | Episode 43 | Revenge | 2014-08-10 | 25 min |
| Season 1 | Episode 44 | Best Pitch | 2014-08-17 | 25 min |
| Season 1 | Episode 45 | Fantasy | 2014-08-24 | 25 min |
| Season 1 | Episode 46 | Pitching of Despair | 2014-08-31 | 25 min |
| Season 1 | Episode 47 | That Summer | 2014-09-07 | 25 min |
| Season 1 | Episode 48 | At the Dorm... | 2014-09-14 | 25 min |
| Season 1 | Episode 49 | A Nostalgic Face | 2014-09-21 | 25 min |
| Season 1 | Episode 50 | Footsteps to Tomorrow | 2014-09-28 | 25 min |
| Season 1 | Episode 51 | The Battle Begins! | 2014-10-05 | 25 min |
| Season 1 | Episode 52 | I Don't Want to Lose | 2014-10-12 | 25 min |
| Season 1 | Episode 53 | Change Gears | 2014-10-19 | 25 min |
| Season 1 | Episode 54 | Entrusted Faith and the Courage to Perform | 2014-10-26 | 25 min |
| Season 1 | Episode 55 | Strong Men | 2014-11-02 | 25 min |
| Season 1 | Episode 56 | Decision | 2014-11-09 | 25 min |
| Season 1 | Episode 57 | Reliable Underclassmen | 2014-11-22 | 25 min |
| Season 1 | Episode 58 | The Three-Hole | 2014-11-30 | 25 min |
| Season 1 | Episode 59 | Fearless | 2014-12-07 | 25 min |
| Season 1 | Episode 60 | Lonely Sun | 2014-12-14 | 25 min |
| Season 1 | Episode 61 | Determined | 2014-12-21 | 25 min |
| Season 1 | Episode 62 | Victory or Defeat | 2014-12-28 | 25 min |
| Season 1 | Episode 63 | Lingering Feelings | 2014-12-28 | 25 min |
| Season 1 | Episode 64 | Restart | 2015-01-11 | 25 min |
| Season 1 | Episode 65 | In the Sun | 2015-01-18 | 25 min |
| Season 1 | Episode 66 | Outsider | 2015-01-25 | 25 min |
| Season 1 | Episode 67 | The Kick | 2015-02-01 | 25 min |
| Season 1 | Episode 68 | The Ace Title | 2015-02-08 | 25 min |
| Season 1 | Episode 69 | Can`t Lose! | 2015-02-15 | 25 min |
| Season 1 | Episode 70 | Next Stage | 2015-02-22 | 25 min |
| Season 1 | Episode 71 | September Sky | 2015-03-01 | 25 min |
| Season 1 | Episode 72 | The Final Lesson | 2015-03-08 | 25 min |
| Season 1 | Episode 73 | Inheritance | 2015-03-15 | 25 min |
| Season 1 | Episode 74 | Guiding Light | 2015-03-22 | 25 min |
| Season 1 | Episode 75 | In Pursuit | 2015-03-29 | 25 min |
| Season 2 | Episode 1 | Howling in the Summer | 2015-04-06 | 25 min |
| Season 2 | Episode 2 | The Summer Heat Haze | 2015-04-13 | 25 min |
| Season 2 | Episode 3 | The Kings of Summer | 2015-04-20 | 25 min |
| Season 2 | Episode 4 | The Fall Tournament Begin! | 2015-04-27 | 25 min |
| Season 2 | Episode 5 | The Cold Rain | 2015-05-04 | 25 min |
| Season 2 | Episode 6 | Out of Order | 2015-05-11 | 25 min |
| Season 2 | Episode 7 | Where I Am | 2015-05-18 | 25 min |
| Season 2 | Episode 8 | Scenario | 2015-05-25 | 25 min |
| Season 2 | Episode 9 | My Path | 2015-06-01 | 25 min |
| Season 2 | Episode 10 | Did You Just Pitch... | 2015-06-08 | 25 min |
| Season 2 | Episode 11 | The Underdog Story | 2015-06-15 | 25 min |
| Season 2 | Episode 12 | Self-Destruction | 2015-06-22 | 25 min |
| Season 2 | Episode 13 | Fissure | 2015-06-29 | 25 min |
| Season 2 | Episode 14 | On My Shoulders | 2015-07-06 | 25 min |
| Season 2 | Episode 15 | Persistent and Diligent | 2015-07-13 | 25 min |
| Season 2 | Episode 16 | Chain Reaction | 2015-07-20 | 25 min |
| Season 2 | Episode 17 | Shut Him Down!! | 2015-07-27 | 25 min |
| Season 2 | Episode 18 | This Guy's Pretty Good | 2015-08-03 | 25 min |
| Season 2 | Episode 19 | An Uncompromising Challenge | 2015-08-10 | 25 min |
| Season 2 | Episode 20 | With Heads Held High | 2015-08-17 | 25 min |
| Season 2 | Episode 21 | Whispers of the Devil? | 2015-08-24 | 25 min |
| Season 2 | Episode 22 | Winging It | 2015-08-31 | 25 min |
| Season 2 | Episode 23 | School Academic Level | 2015-09-07 | 25 min |
| Season 2 | Episode 24 | Individual Minds | 2015-09-14 | 25 min |
| Season 2 | Episode 25 | Zeal | 2015-09-21 | 25 min |
| Season 2 | Episode 26 | The Conceited Underclassman | 2015-09-28 | 25 min |
| Season 2 | Episode 27 | Step by Step | 2015-10-05 | 25 min |
| Season 2 | Episode 28 | The Resilient Second-String | 2015-10-12 | 25 min |
| Season 2 | Episode 29 | Demon Child | 2015-10-19 | 25 min |
| Season 2 | Episode 30 | The Kings' Roar | 2015-10-26 | 25 min |
| Season 2 | Episode 31 | The Courage He Gave Me | 2015-11-02 | 25 min |
| Season 2 | Episode 32 | The Resolve for Responsibility | 2015-11-09 | 25 min |
| Season 2 | Episode 33 | The Ace's Instinct | 2015-11-16 | 25 min |
| Season 2 | Episode 34 | Innocent | 2015-11-23 | 25 min |
| Season 2 | Episode 35 | The World Beyond | 2015-11-30 | 25 min |
| Season 2 | Episode 36 | Rematch | 2015-12-07 | 25 min |
| Season 2 | Episode 37 | Priorities | 2015-12-14 | 25 min |
| Season 2 | Episode 38 | One Pitch | 2015-12-21 | 25 min |
| Season 2 | Episode 39 | Meeting Expectations | 2016-01-04 | 25 min |
| Season 2 | Episode 40 | Play Ball | 2016-01-11 | 25 min |
| Season 2 | Episode 41 | The Lead-Off Man | 2016-01-18 | 25 min |
| Season 2 | Episode 42 | Fastball, Featuring Todoroki | 2016-01-25 | 25 min |
| Season 2 | Episode 43 | To This Side | 2016-02-01 | 25 min |
| Season 2 | Episode 44 | The Best Fastball | 2016-02-08 | 25 min |
| Season 2 | Episode 45 | The Field | 2016-02-15 | 25 min |
| Season 2 | Episode 46 | The Decision | 2016-02-22 | 25 min |
| Season 2 | Episode 47 | Partnership | 2016-02-29 | 25 min |
| Season 2 | Episode 48 | Party Boys | 2016-03-07 | 25 min |
| Season 2 | Episode 49 | Just You Wait! | 2016-03-14 | 25 min |
| Season 2 | Episode 50 | Last Inning | 2016-03-21 | 25 min |
| Season 2 | Episode 51 | Seek Diamonds | 2016-03-28 | 25 min |
| Season 3 | Episode 1 | Beyond the Dream | 2019-04-02 | 30 min |
| Season 3 | Episode 2 | Wanna Take the Mound | 2019-04-09 | 25 min |
| Season 3 | Episode 3 | Blessed by the Baseball Gods | 2019-04-16 | 25 min |
| Season 3 | Episode 4 | The Day It Began | 2019-04-23 | 25 min |
| Season 3 | Episode 5 | Joining | 2019-04-30 | 25 min |
| Season 3 | Episode 6 | Go Straight | 2019-05-07 | 25 min |
| Season 3 | Episode 7 | King | 2019-05-14 | 25 min |
| Season 3 | Episode 8 | Camphor | 2019-05-21 | 25 min |
| Season 3 | Episode 9 | Battle, Battle | 2019-05-28 | 25 min |
| Season 3 | Episode 10 | Debut | 2019-06-04 | 25 min |
| Season 3 | Episode 11 | Where You Look | 2019-06-11 | 25 min |
| Season 3 | Episode 12 | Selfish | 2019-06-18 | 25 min |
| Season 3 | Episode 13 | Batting First | 2019-06-25 | 25 min |
| Season 3 | Episode 14 | Presence | 2019-07-01 | 25 min |
| Season 3 | Episode 15 | My Role | 2019-07-09 | 25 min |
| Season 3 | Episode 16 | Only After You've Won | 2019-07-16 | 25 min |
| Season 3 | Episode 17 | Three Months | 2019-07-23 | 25 min |
| Season 3 | Episode 18 | Something to Find Out | 2019-07-30 | 25 min |
| Season 3 | Episode 19 | Competitive Streak | 2019-08-06 | 25 min |
| Season 3 | Episode 20 | Self-Assertive | 2019-08-13 | 25 min |
| Season 3 | Episode 21 | Out of time | 2019-08-19 | 25 min |
| Season 3 | Episode 22 | Chosen | 2019-08-26 | 25 min |
| Season 3 | Episode 23 | One Pitch, One Second | 2019-09-03 | 25 min |
| Season 3 | Episode 24 | Incomplete | 2019-09-10 | 25 min |
| Season 3 | Episode 25 | Unleashed | 2019-09-17 | 25 min |
| Season 3 | Episode 26 | Beneath the Same Banner | 2019-09-24 | 25 min |
| Season 3 | Episode 27 | The Note | 2019-10-01 | 25 min |
| Season 3 | Episode 28 | I'm Not Stopping! | 2019-10-08 | 25 min |
| Season 3 | Episode 29 | After Spring Comes | 2019-10-15 | 25 min |
| Season 3 | Episode 30 | The Bloom of Youth | 2019-10-22 | 25 min |
| Season 3 | Episode 31 | Kind of Like a Promise | 2019-10-29 | 25 min |
| Season 3 | Episode 32 | Hunger | 2019-11-05 | 25 min |
| Season 3 | Episode 33 | Heat Transfer | 2019-11-12 | 25 min |
| Season 3 | Episode 34 | Competition | 2019-11-19 | 25 min |
| Season 3 | Episode 35 | Because He's Awesome | 2019-11-26 | 25 min |
| Season 3 | Episode 36 | As a Catcher | 2019-12-03 | 25 min |
| Season 3 | Episode 37 | Invincible Mentality | 2019-12-10 | 25 min |
| Season 3 | Episode 38 | Fragile | 2019-12-17 | 25 min |
| Season 3 | Episode 39 | I'm Counting on You | 2019-12-24 | 25 min |
| Season 3 | Episode 40 | Expression | 2020-01-07 | 25 min |
| Season 3 | Episode 41 | Common Destiny | 2020-01-14 | 25 min |
| Season 3 | Episode 42 | 20 People | 2020-01-21 | 25 min |
| Season 3 | Episode 43 | Summer Training Camp | 2020-01-28 | 25 min |
| Season 3 | Episode 44 | Setting Sail | 2020-02-04 | 25 min |
| Season 3 | Episode 45 | Go exceed | 2020-02-10 | 25 min |
| Season 3 | Episode 46 | Encouragement | 2020-02-17 | 25 min |
| Season 3 | Episode 47 | Under the Feet | 2020-02-24 | 25 min |
| Season 3 | Episode 48 | Get Back | 2020-03-02 | 25 min |
| Season 3 | Episode 49 | Seido Goes All Out | 2020-03-10 | 25 min |
| Season 3 | Episode 50 | FIRE AGE | 2020-03-17 | 25 min |
| Season 3 | Episode 51 | That's the Reason Why | 2020-03-24 | 25 min |
| Season 3 | Episode 52 | Ace of Diamond | 2020-03-31 | 25 min |
| Production | Takema Okamura | Executive Producer |
| Production | Naokazu Tsuruta | Executive Producer |
| Production | Jotaro Moroga | Executive Producer |
| Visual Effects | Satoshi Tasaki | Character Designer |
| Visual Effects | Ryo Kobayashi | Supervising Animation Director |
| Visual Effects | Shinichi Yoshikawa | Supervising Animation Director |
| Directing | Kazuya Iwata | Assistant Director |
| Art | Sawako Takagi | Art Direction |
| Camera | Hiroshi Inoue | Director of Photography |
| Editing | Mariko Tsukatsune | Editor |
| Sound | Hajime Hyakkoku | Original Music Composer |
| Production | Yuki Onoue | Other |
| Production | Keigo Hasegawa | Other |
| Production | Rina Nakazawa | Associate Producer |
| Production | Takehiro Miyazaki | Associate Producer |
| Production | Kento Yoshida | Associate Producer |
| Production | Gota Aijima | Associate Producer |
| Production | Mirai Yamauchi | Producer |
| Visual Effects | Narumi Konno | Color Designer |
| Production | Yusuke Muranaka | Other |
| Production | Hideyuki Nanba | Other |
| Production | Kazuma Kurio | Other |
| Production | Yuichi Nakao | Other |
| Production | Yoshimi Abe | Other |
| Production | Yoko Kogawa | Other |
| Production | Naotoshi Tsunoda | Other |
| Production | Hideyuki Igarashi | Executive Producer |
| Production | Takahiro Sasaki | Executive Producer |
| Production | Mitsugu Iwano | Executive Producer |
| Production | Naoki Nakamura | Other |
| Sound | Yusuke Inada | Sound Effects |
| Sound | Koji Shimizu | Sound Recordist |
| Production | Masahiro Takahashi | Other |
| Production | Yuki Yoshida | Executive Producer |
| Visual Effects | Minoru Ueta | Character Designer |
| Sound | Hajime Takakuwa | Sound Director |
| Production | Nakuru Yamitani | Associate Producer |
| Writing | Kenji Konuta | Series Composition |
| Writing | Yuuji Terajima | Comic Book |
| Directing | Mitsuyuki Masuhara | Series Director |
| Sound | Yasushi Miwa | Music Producer |
