20 Seiki Denki Mokuroku
Japanese light novel
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20 Seiki Denki Mokuroku (Japanese: 二十世紀電氣目録, Hepburn: Nijuuseiki Denki Mokuroku; transl. '20th Century Electricity Catalog') is a Japanese light novel written by Hiro Yūki and illustrated by Kazumi Ikeda, with art and backgrounds by Momoka Nagatani. Kyoto Animation published the novel under their KA Esuma Bunko imprint in August 2018. An anime television series adaptation also produced by the studio, titled in English as Sparks of Tomorrow, is set to premiere in July 2026.
| 20 Seiki Denki Mokuroku | |
Cover of the novel | |
| 二十世紀電氣目録 (Nijuuseiki Denki Mokuroku) | |
|---|---|
| Light novel | |
| Written by | Hiro Yūki |
| Illustrated by | Kazumi Ikeda |
| Published by | Kyoto Animation |
| Imprint | KA Esuma Bunko |
| Published | August 10, 2018 |
| Anime television series | |
| Sparks of Tomorrow | |
| Directed by | Minoru Ōta |
| Written by | Tatsuhiko Urahata |
| Music by | Hitomi Koto |
| Studio | Kyoto Animation |
| Licensed by | Netflix (streaming rights) |
| Original network | Tokyo MX, BS11, ABC TV, TV Aichi |
| Original run | July 5, 2026 – scheduled |
Synopsis
Characters
- Kihachi Sakamoto (坂本 喜八, Sakamoto Kihachi)
- Voiced by: Yuma Uchida[1]
- A timid boy who has a knack of inventing machines. He originally dreamed of ushering in an age of electricity with his older brother using the 20th Century Electrical Catalog, but was forced to repress it following the disappearance of his brother and the catalog.
- Inako Momokawa (百川 稲子, Momokawa Inako)
- Voiced by: Sora Amamiya[1]
- A trustworthy yet unassertive girl who is part of a family of sake brewers. She dreams of following her deceased mother's footsteps of becoming a sake brewer.
- Yosuke Mizoe (三添 洋輔, Mizoe Yosuke)
- Voiced by: Koki Uchiyama[2]
- A talented engineer and heir of a store specializing in steam engines who aims to obtain the 20th Century Electrical Catalog by any means necessary, including an engagement to Inako.
- Seiroku Sakamoto (坂本 清六, Sakamoto Seiroku)
- Voiced by: Daisuke Ono[2]
- Kihachi's older brother, who has a passion for electricity and aims to help usher a new age with Kihachi before mysteriously disappearing with the 20th Century Electrical Catalog.
- Kengo Kuga (陸 健吾, Kuga Kengo)
- Voiced by: Shunsuke Takeuchi[2]
- A former soldier and schoolmate of Seiroku who has imposing physical strength and is familiar with the 20th Century Electrical Catalog carried by Seiroku. He is also Noriko's fiancé.
- Noriko Momokawa (百川 規子, Momokawa Noriko)
- Voiced by: Minako Kotobuki[2]
- Inako's older sister and Kengo's fiancé, who is skilled in martial arts and watches over Inako’s growth, while also secretly possessing the 20th Century Electrical Catalog.
- Suzu Harashima (原島 すず, Harashima Suzu)
- Voiced by: Yō Taichi[3]
- Inako and Kate's witty and cunning classmate who keeps a variety of tools.
- Kate Okura (大倉 ケイト, Okura Keito)
- Voiced by: Natsumi Kawaida[3]
- Inako and Suzu's British-Japanese classmate who is full of energy.
- Yajiro Yagura (矢倉 弥治郎, Yagura Yajiro)
- Voiced by: Kazuki Ura[3]
- Kihachi’s shy cousin who is talented at drawing and is the heir to a boarding house.
- Izo Masubuchi (鱒淵 伊蔵, Masubuchi Izo)
- Voiced by: Daisuke Hirakawa[3]
- Yosuke's secretary and bodyguard who mainly serves as his guardian.
Media
Light novel
20 Seiki Denki Mokuroku is a Japanese light novel written by Hiro Yūki and illustrated by Kazumi Ikeda, with art and backgrounds by Momoka Nagatani. Kyoto Animation published the novel under their KA Esuma Bunko imprint on August 10, 2018 (ISBN 978-4-907064-88-4).[4][5]
Anime
On July 27, 2018, KA Esuma Bunko's Twitter account announced that an anime adaptation of the novel would be produced, and would be animated by Kyoto Animation, but the project's status remained unknown for years following the arson attack next year, which destroyed Kyoto Animation's main production office.[5][6]
On October 25, 2025, Kyoto Animation announced during its "KyoAni no Sekai-ten" ("Meet the Worlds of KyoAni") event that the anime adaptation would be a television series, titled 20 Seiki Denki Mokuroku Eureka Evrika (二十世紀電氣目録-ユーレカ・エヴリカ-) and known in English as Sparks of Tomorrow. It will be directed by Minoru Ōta, with series composition handled by Tatsuhiko Urahata, characters designed by Kohei Okamura, who will also serve as chief animation director, worldview setting handled by Takaaki Suzuki, and music composed by Hitomi Koto. The series is set to premiere on July 5, 2026, on Tokyo MX and other networks.[1] An advance screening for the first episode will be held at the 2026 Annecy International Animation Film Festival.[7] The opening theme song is "Eureka Evrika", performed by Luna Goami, while the ending theme song is performed by Ginger Root.[3] Netflix will stream the series globally.[8]