Series synopsis
The Summer Hikaru Died, also known as 光が死んだ夏 is a Japanese animation drama mystery sci-fi & fantasy television series that premiered on Nippon TV on July 6, 2025. It stars Chiaki Kobayashi, Shuichiro Umeda, Chikahiro Kobayashi and Wakana Kowaka.
Six months ago, Hikaru vanished for a week. Now, as his best friend Yoshiki senses something amiss and confronts him, the harrowing truth emerges.
Premise
Six months ago, Hikaru vanished for a week. Now, as his best friend Yoshiki senses something amiss and confronts him, the harrowing truth emerges.
Cast and characters
Leading cast
- Chiaki Kobayashi as Yoshiki Tsujinaka (voice)
- Shuichiro Umeda as Hikaru Indo (voice)
- Chikahiro Kobayashi as Tanaka (voice)
- Wakana Kowaka as Rie Kurebayashi (voice)
- Yumiri Hanamori as Asako Yamagishi (voice)
- Yoshiki Nakajima as Yuta Maki (voice)
- Shion Wakayama as Yuki Tadokoro (voice)
Guest cast
- Ryoko Shiraishi as Satoko Tsujinaka (voice)
- Fuminori Komatsu as Toshinori Tsujinaka (voice)
- Seika Hirose as Kaoru Tsujinaka (voice)
- Setsuji Sato as Harasen (voice)
- Koji Ishii as Hajime Takeda (voice)
- Bin Shimada as Tetsu Mikasa (voice)
- Lynn as Satou (voice)
- Takayuki Sugo as Old Man Takeda (voice)
- Kazuko Sugiyama as Ms. Matsuura (voice)
- Kousuke Goto as Matsushima (voice)
- Masatomo Nakazawa as Kohei Indo (voice)
- Yuuki Urushiyama as Hikaru Indo (Childhood) (voice)
Episodes
This series spans 2 seasons with 12 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 12 | July 6, 2025 | September 28, 2025 |
| Season 2 | 0 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Replacement Yoshiki confronts Hikaru about his suspicions and discovers the terrifying truth. Even though they try to live normally, eerie incidents begin to occur. |
July 6, 2025 |
| 2 |
Suspicion While Yoshiki and Hikaru accompany their classmates to a creepy mountain trail, a mysterious man arrives at Kubitachi Village and begins investigating. |
July 13, 2025 |
| 3 |
Denial Recalling childhood memories with Hikaru, Yoshiki continues to struggle with his complex emotions. Desperate, he reaches out to Kurebayashi. |
July 20, 2025 |
Production
Release
| Original network/platform | Nippon TV |
|---|---|
| First aired | July 6, 2025 |
| Last aired | September 28, 2025 |
| Runtime | 24 minutes |
| Status | Returning Series |
| Schedule | Saturday at 00:55:00 |