
Koki Koyasu
Known for Acting · 8 credits
- Born
- 1994-01-09 (age 32)
- Place of birth
- Tokyo, Japan
- Also known as
- Kouki Koyasu · 子安 光樹 · Kōki Koyasu · 子安光树
Biography
Koki Koyasu is a Japanese voice actor. He is the son of popular voice actor Takehito Koyasu and a member of his agency T's Factory.
Known For

Re:ZERO -Starting Life in Another World-
2016
as Roswaal B. Mathers (voice)

Dan Da Dan
2024
as Male Student A (voice)

Call of the Night
2022
as Kai (voice)

Demon Slayer: Kimetsu no Yaiba
2019
as (voice)

Toilet-Bound Hanako-kun
2020
as Male Classmate A (voice)

I'm Standing on a Million Lives
2020
as Nomura (voice) / Maccahee (voice)
TV Shows (8)

Re:ZERO -Starting Life in Another World-
2016
as Roswaal B. Mathers (voice)

Dan Da Dan
2024
as Male Student A (voice)

Call of the Night
2022
as Kai (voice)

Demon Slayer: Kimetsu no Yaiba
2019
as (voice)

Toilet-Bound Hanako-kun
2020
as Male Classmate A (voice)

I'm Standing on a Million Lives
2020
as Nomura (voice) / Maccahee (voice)

Hortensia SAGA
2021
as Camellia Soldier (voice) / Church Knight (voice)

Reiwa ni Kannou Shousetsu Tsukuttemasu
2026
as Oizumi Aoi
About Koki Koyasu
Koki Koyasu is a Japanese voice actor. He is the son of popular voice actor Takehito Koyasu and a member of his agency T's Factory. With 8 credits spanning from 2016 to 2026, Koki Koyasu has appeared in 0 films and 8 TV shows.
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Where to Watch Koki Koyasu Films
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