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Sandbox:SNOWBALL EARTH (TV 2026)

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SNOWBALL EARTH
Key art for Snowball Earth
Air date April 3, 2026–present
Directed by Munehisha Sekai
Written by Shigeru Murakoshi et al.
Music by Tatsuya Kato, Hiroaki Tsutsumi, Yuki Kanesaka
Funded by "SNOWBALL EARTH" Project
Production company Studio KAI
Channel(s) Nippon TV
Episodes 13[1]
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Zero Friends. One Mission: Save The Earth!
„ 

— English tagline

SNOWBALL EARTH (スノウボールアース,   Sunōbōru Āsu) is a 2026 animated mecha series animated by Studio KAI. It is an adaptation of the Monthly Big Comic Spirits manga of the same name by Yuhiro Tsujitsugu.

Description

For shy young Tetsuo, the only friend he’s ever known is the giant robot Yukio. Together, they defended humanity as its “saviors,” standing against galactic monsters that invaded from space.

A decade has passed since their final, desperate battle for humanity’s survival.

When Tetsuo finally returns to Earth, he finds a world transformed into a frozen wasteland— an icebound planet now known as Snowball Earth.

Carrying the promise he once made to Yukio deep in his heart, Tetsuo takes his first steps into this strange new world.

Episodes

Episodes are referred to onscreen as "Steps". Their numbers are formatted, 第1ヶ条 (Dai Ichi-kajō, "Step 1") and so on.

Key
Denotes release dates that are assumed but not confirmed
No. Title Directed by Storyboards by Written by Air date
1 "THE SAVIOR WHO COULD NOT BRING SALVATION" Munehisa Sakai Munehisa Sakai Shigeru Murakoshi April 3, 2026
In 2025 AD, after a sudden invasion of intergalactic kaiju, a painfully shy boy, Tetsuo Yabusame, saves the autonomous bomb Yukio and becomes an unlikely defender of Earth. Ten years later, now hailed as a "savior", Tetsuo heads into space with Yukio for the Final Battle. With 20,000 kaiju closing in, humanity's fate is on the line to bring an end to this relentless conflict!
2 "ENCOUNTERS" Takeshi Iwata Takeshi Iwata Shigeru Murakoshi April 10, 2026
The world outside the escape pod is covered in snow and ice, and devoid of life. Tetsuo sets off to find human survivors, his promise to Yukio on his mind. Riding an excavator that he finds in the ruins, he battles an intergalactic kaiju that attacks him, and it is then that he encounters the members of humankind who’ve survived! Can Tetsuo finally make the “friends” that he’s always longed for?
3 "MY FIRST FRIEND" Tomonari Tanaka Ko Matsuo Shigeru Murakoshi April 17, 2026
After meeting Ao and the others on the frozen Earth, Tetsuo is gradually accepted into the fold.
4 "THE KAIJU TAMER AND THE CAN OF PINEAPPLE" Satoshi Ifuku Satoshi Ifuku Kodai Minami April 24, 2026
Tetsuo and Yukio are crossing the snowy plains to reach the Mishima Mall, where Ao and the others live.
5 "GOOD JOB!" Shunsuke Machitani Shunsuke Machitani Takeshi Iwata May 1, 2026
Welcomed into the Takimura family, Tetsuo meets Hagane, a young girl who just lost her mother a month ago.
6 "BEYOND THE MADNESS" Takeshi Iwata Takeshi Iwata Shigeru Murakoshi May 8, 2026
Suddenly, Yukio is assaulted from afar by snipers. Showing up soon afterwards is “The Light of E-RDE (Vierde)”, a brigade of boys and girls controlling kaiju. Like Tetsuo, their commander, Sagami, once belonged to E-RDE. He’s a man harboring a twisted sense of justice and raging jealousy. As past grudges and madness mingle inside him, he unleashes a merciless attack on Tetsuo and the others!
7 "THE COST OF COURAGE" Tomonari Tanaka Tomonari Tanaka Kodai Minami May 15, 2026
Yukio, half-destroyed, is under fierce attack by Hercules, a powerful kaiju that emerges from the snow. Tetsuo desperately goes on the defensive, but bit by bit, the enemy’s overwhelming power and calculated tactics backs him into a corner. Finding himself in dire straits, what Tetsuo tries next to turn the tide of battle is… communication, for the first time ever!
8 "MISHIMA MALL ACTIVATES" Yuichi Wada Koichi Ohata Takeshi Iwata May 22, 2026
As Tetsuo and the others rush back to the Mall, they receive a mysterious transmission. At around the same time, Mishima Mall is ambushed by Vierde! The Boss activates the secret “Anti-Kaiju Defense System” to fend off the kaiju attack, and it’s all hands on deck! Can the Mall residents hold out until the savior arrives?
9 "THE GREAT KAIJU WAR" Tomonari Tanaka Hiroshi Kobayashi Shigeru Murakoshi May 29, 2026
Ten years after saving Earth with his robot friend Yukio, Tetsuo returns to a planet of endless ice and snow.
10 TBA June 5, 2026
11 TBA June 12, 2026
12 TBA June 19, 2026
13 TBA June 26, 2026

Staff

Staff role on the left, staff member's name on the right.

  • Directed by   Munehisa Sakai
  • Assistant director   Takeshi Iwata
  • Episode directors   Munehisha Sekai, Takeshi Iwata, Tomonari Tanaka, Satoshi Ifuku, Yuichi Wada
  • Storyboards by   Munehisa Sakai, Takeshi Iwata, Ko Matsuo, Satoshi Ifuku, Koichi Ohata, Hiroshi Kobayashi
  • Chief animation director   Toshiya Kono
  • Series composition by   Shigeru Murakoshi
  • Written by   Shigeru Murakoshi, Kodai Minami, Takeshi Iwata
  • Based on the manga by   Yuhiro Tsujitsugu
  • Music by   Tatsuya Kato, Hiroaki Tsutsumi, Yuki Kanesaka
  • Chief animation director and character designer   Toshiya Kono
  • Art Director   Mari Fujino
  • Directors of photography   Kenta Hayashi, Shota Kodera
  • Executive producers   Keiji Ota, Kazutaka Yamanaka
  • Co-executive producers   Yuzo Kuwabara, Shuji Wada, Takayuki Oshima, Masahiko Minami, Eiji Inomoto
  • Produced by   Hibiki Saito, Yuito Hirahara, Shinya Ishihara
  • Publicity producer   Masataka Fukamachi
  • Chief producer   Atsushi Takahashi
  • Music producer   Kenji Kobayashi
  • Opening theme "zero" by   tuki.
  • Ending theme "What's Burning in My Heart Right Now" by   Ai Higuchi
  • Sound director   Munehisa Sakai
  • Sound effects by   Eiko Morikawa
  • Character Modeling Supervisor   Kentaro Kogusuri
  • Modeling supervisor   Nozomi Ogihara
  • Prop design by   Kazuma Tanaka
  • 3DCG directors   Hiroki Motooka, Takuma Uno
  • 3DCG animation supervisor   Hiroki Motooka
  • Art director   Mari Fujino
  • Color design by   Hironori Noji
  • CG director   Hironori Motooka
  • Editing by   Tomoki Nagasaka
  • Character designer   Yuhiro Tsujitsugu
  • Sub-character design by   Sera Kota
  • Monster designer   Ryuta Yanagi
  • Mechanical designer   Sejoon Kim

Cast

Actor's name on the left, character played on the right.

Appearances

Mecha and kaiju

Weapons, vehicles, races, and organizations

  • E-RDE
  • Intergalatic Cruiser E-RDE
  • E-RDE fighter jet
  • Small Excavator-type vehicle

Development

TBA.

Marketing

TBA.

Gallery

Screenshots

To be added.

Posters

Internet

Videos

Trailers

Teaser Trailer

English-Subtitled Trailer

English-Subtitled Main Trailer

Miscellaneous

Creditless opening sequence

Trivia

External links

Refferences

This is a list of references for Snowball Earth. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: [1]

  1. "/Blu\-ray BOX発売決定!!❄\ 9月16日\(水\)に発売決定ユキオ型スリーブや氷結BOX⛄原作者:辻次先生の書き下ろし短編も収録される 『怪獣でもわかるスノウボールアースの作り方』など 豪華特典が満載✨\#スノウボールアース\#snowballearth". X. Retrieved 3 April 2026. line feed character in |title= at position 75 (help)

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