Ace of Diamond Season 4: Where to watch, release time, epsidoe count, cast and plot details

The long-awaited return of one of the best baseball anime is just around the corner. After a six-year hiatus since the end of Ace of Diamond Act II‘s first season in 2020, Ace of Diamond Act II Second Season (considered Season 4 overall) premieres on April 5, 2026. Fans of high-stakes pitching duels, team camaraderie, and underdog stories are in for a treat.

Where to Watch

• Crunchyroll: Expected to simulcast the new season as part of its Spring 2026 lineup, following its history with the franchise.

The series airs on TV Tokyo and affiliates in Japan, with international availability on major platforms.

Release Time & Schedule

• Premiere Date: April 5, 2026
• Weekly episodes expected on Saturdays (Japan time), with global streaming following soon after. Exact times will vary by platform and region—check your local listings closer to the date.

Episode Count

The exact total isn’t fully confirmed yet, but sources indicate it may start with a 13-episode first cour (part), similar to cour-based modern anime seasons. Past seasons often ran 50+ episodes, so expect a substantial run covering key manga arcs.

Cast (Main Returning Voice Actors)

The core Seido High lineup is back with the same talented seiyuu:

• Ryota Osaka as Eijun Sawamura (the fiery southpaw protagonist)
• Takahiro Sakurai as Kazuya Miyuki (genius catcher)
• Nobunaga Shimazaki as Satoru Furuya (power pitcher rival)
• Natsuki Hanae as Haruichi Kominato (reliable second baseman)
• Additional cast like Daisuke Namikawa (Chris Yu Takigawa) and others reprising roles.

New director Hideaki Oba leads at Studio OLM (known for Pokémon, Komi Can’t Communicate), with returning scriptwriter Kenji Konuta.

Plot Details (Spoiler-Light)

The new season picks up with Seido High invited to the prestigious Spring Invitational at Koshien Stadium. Sawamura finally gets his chance to stand on the national stage as the team aims to reclaim glory and push toward the Summer Nationals.

Expect intense matchups against powerhouses like Komadai Fujimaki and their ace Masamune Mushroom. The story dives deeper into team dynamics, personal growth, and the pressure of high school baseball dreams. After previous tournament setbacks, Seido rebuilds stronger—focusing on strategy, endurance, and unbreakable bonds on the diamond.

If you’re new to the series, Ace of Diamond follows hot-headed pitcher Eijun Sawamura as he joins elite Seido High’s baseball club, mentored by star catcher Miyuki. It’s packed with realistic baseball action, emotional highs, and classic sports anime tropes done right.