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Playback is currently unavailable for S1 E1 · Replacement. Episode details remain available below.

Poster for The Summer Hikaru Died

The Summer Hikaru Died

8.2/10 136 votes
AnimationDramaMysterySci-Fi & Fantasy

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:
Chiaki Kobayashi, Shuichiro Umeda, Chikahiro Kobayashi, Wakana Kowaka
Language:
Japanese
Country:
Japan
Network:
Nippon TV

Episode guide

Seasons

2 available

Season 1

Episodes

Episode 1 selected
Still from Replacement E01

Episode 1

★ 8.2

Replacement

2025-07-06 · 24m

Yoshiki confronts Hikaru about his suspicions and discovers the terrifying truth. Even though they try to live normally, eerie incidents begin to occur.

Current episode
Still from Suspicion E02

Episode 2

★ 7.6

Suspicion

2025-07-13 · 24m

While Yoshiki and Hikaru accompany their classmates to a creepy mountain trail, a mysterious man arrives at Kubitachi Village and begins investigating.

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Still from Denial E03

Episode 3

★ 7.8

Denial

2025-07-20 · 24m

Recalling childhood memories with Hikaru, Yoshiki continues to struggle with his complex emotions. Desperate, he reaches out to Kurebayashi.

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Still from Summer Festival E04

Episode 4

★ 7.7

Summer Festival

2025-07-27 · 24m

As Yoshiki attends the summer festival with Hikaru, the village elders fret over the recent death and Tanaka ends up with more questions than answers.

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Still from Wig Ghost E05

Episode 5

★ 6.8

Wig Ghost

2025-08-03 · 24m

When Yoshiki's sister spots a creepy clump of hair in the bathroom, Hikaru visits the Tsujinaka home to investigate — but things take a deadly turn.

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Still from Asako E06

Episode 6

★ 6.5

Asako

2025-08-10 · 24m

Yoshiki and his classmates discuss a story their teacher assigned them. Later, at a sleepover, Asako's sharp observations put her in grave danger.

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Still from Determination E07

Episode 7

★ 8.2

Determination

2025-08-17 · 24m

After the sobering realization that Hikaru is truly dangerous, Yoshiki decides that he must act and invites his best friend to skip school together.

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Still from Contact E08

Episode 8

★ 7.3

Contact

2025-08-24 · 24m

Yoshiki and Hikaru investigate Nonuki-sama and its link to Kubitachi's history. While at the library, they get an important lead from a surprising source.

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Still from Old Man Takeda E09

Episode 9

★ 7.8

Old Man Takeda

2025-09-07 · 24m

Kurebayashi shares her knowledge about impurities with the boys. Later, the elder Takeda loses his temper over Hikaru's ignorance of the Indo's history.

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Still from Truth E10

Episode 10

★ 6.7

Truth

2025-09-14 · 24m

The boys' surprise encounter with Tanaka lands them in the hospital. When they return to school, Yoshiki pieces together the truth behind Nonuki-sama.

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Still from Indo's Sin E11

Episode 11

★ 7.0

Indo's Sin

2025-09-21 · 24m

Though hesitant, Yoshiki asks his father about the Indo family's murky past and secret ritual. Later, Hikaru loses control at school and feels deeply shaken.

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Still from Its Place E12

Episode 12

★ 6.5

Its Place

2025-09-28 · 24m

While everyone else attends the school assembly, Asako finds Hikaru wandering the halls. Alone at the beach, Hikaru reveals his final plans to Yoshiki.

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Cast

Chiaki Kobayashi

Chiaki Kobayashi

Yoshiki Tsujinaka (voice)

Shuichiro Umeda

Shuichiro Umeda

Hikaru Indo (voice)

Chikahiro Kobayashi

Chikahiro Kobayashi

Tanaka (voice)

Wakana Kowaka

Wakana Kowaka

Rie Kurebayashi (voice)

Yumiri Hanamori

Yumiri Hanamori

Asako Yamagishi (voice)

Yoshiki Nakajima

Yoshiki Nakajima

Yuta Maki (voice)

Shion Wakayama

Shion Wakayama

Yuki Tadokoro (voice)

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