Yasumasa Koyama
小山恭正
Freelancer. Recognizable for his bassy and often reverbed sound effects.
Regularly works with Yoshikazu Iwanami and Jin Aketagawa.
Works
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★ 7.3
Is It Wrong to Try to Pick Up Girls in a Dungeon?
TV · 2015
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★ 7.1
Another
TV · 2012
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★ 8.2
That Time I Got Reincarnated as a Slime Season 2
TV · 2021
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★ 7.7
Plastic Memories
TV · 2015
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★ 7.1
Is It Wrong to Try to Pick Up Girls in a Dungeon? II
TV · 2019
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★ 8.2
KONOSUBA -God's blessing on this wonderful world!- Legend of Crimson
MOVIE · 2019
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★ 6.7
Angels of Death
TV · 2018
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★ 7.4
Is It Wrong to Try to Pick Up Girls in a Dungeon? III
TV · 2020
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★ 8.2
KONOSUBA -God's blessing on this wonderful world! 3
TV · 2024
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★ 7.1
How a Realist Hero Rebuilt the Kingdom
TV · 2021
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★ 6.5
Oreshura
TV · 2013
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★ 7.8
Fire Force Season 3
TV · 2025
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★ 7.7
Is It Wrong to Try to Pick Up Girls in a Dungeon? IV
TV · 2022
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★ 6.6
Strike the Blood
TV · 2013
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★ 6.8
Combatants Will Be Dispatched!
TV · 2021
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★ 7.4
KONOSUBA -An Explosion on This Wonderful World!
TV · 2023
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★ 8.1
Saga of Tanya the Evil - the Movie -
MOVIE · 2019
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★ 7.4
The Slime Diaries
TV · 2021
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★ 6.2
Blood-C
TV · 2011
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★ 7.1
Engaged to the Unidentified
TV · 2014
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★ 7.6
The Anthem of the Heart
MOVIE · 2015
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★ 6.9
Princess Connect! Re:Dive
TV · 2020
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★ 7.3
HELLO WORLD
MOVIE · 2019
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★ 6.2
Suppose a Kid from the Last Dungeon Boonies moved to a starter town?
TV · 2021
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★ 7.3
How a Realist Hero Rebuilt the Kingdom Part 2
TV · 2022
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★ 8.2
Fire Force Season 3 Part 2
TV · 2026
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★ 6.6
Yuuna and the Haunted Hot Springs
TV · 2018
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★ 8.3
Dr. STONE SCIENCE FUTURE Cour 3
TV · 2026
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★ 7.5
The Demon Girl Next Door
TV · 2019
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★ 7.0
My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge!
TV · 2025
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★ 7.4
Rurouni Kenshin (2023)
TV · 2023
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★ 6.7
The Foolish Angel Dances with the Devil
TV · 2024
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★ 7.1
The Legend of the Legendary Heroes
TV · 2010
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★ 7.6
Thus Spoke Rohan Kishibe
OVA · 2017
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★ 8.1
Non Non Biyori Repeat
TV · 2015
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★ 6.5
I Left My A-Rank Party to Help My Former Students Reach the Dungeon Depths!
TV · 2025
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★ 6.4
BABYLON
TV · 2019
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★ 7.0
Trinity Seven: Eternal Library & Alchemic Girl
MOVIE · 2017
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★ 7.3
Knights of Sidonia
TV · 2014
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★ 6.2
Killing Bites
TV · 2018
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★ 7.8
SKET Dance
TV · 2011
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★ 6.0
2.43: Seiin High School Boys Volleyball Team
TV · 2021
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★ 8.0
KONOSUBA -God's Blessing on This Wonderful World! 3 -BONUS STAGE-
OVA · 2025
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★ 6.0
Berserk 2
TV · 2017
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★ 6.9
Listen to Me, Girls. I Am Your Father!
TV · 2012
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★ 8.3
Non Non Biyori Nonstop
TV · 2021
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★ 7.2
Train to the End of the World
TV · 2024
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★ 6.8
Sagrada Reset
TV · 2017
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★ 6.8
Chrome Shelled Regios
TV · 2009
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★ 7.3
Yozakura Quartet: Hana no Uta
TV · 2013
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★ 6.0
Astarotte's Toy
TV · 2011
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★ 6.8
BLAME!
MOVIE · 2017
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★ 6.7
ENDRO!
TV · 2019
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★ 7.2
MAYONAKA PUNCH
TV · 2024
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★ 7.8
The Demon Girl Next Door Season 2
TV · 2022
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★ 8.1
Non Non Biyori Vacation
MOVIE · 2018
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★ 7.5
Tojima Wants to Be a Kamen Rider
TV · 2025
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★ 6.9
The Darwin Incident
TV · 2026
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★ 6.5
Deadman Wonderland: The Red Knife Wielder
OVA · 2011
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★ 7.7
Food for the Soul
TV · 2025
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★ 7.5
Knights of Sidonia: Battle for Planet Nine
TV · 2015
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★ 5.9
Batman Ninja
MOVIE · 2018
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Airing
STEEL BALL RUN JoJo's Bizarre Adventure 2nd - 3rd STAGE
ONA · 2026
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★ 7.9
Girls und Panzer das Finale - Part 1
MOVIE · 2017
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★ 6.3
FORTUNE ARTERIAL: Akai Yakusoku
TV · 2010
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★ 5.5
Akikan!
TV · 2009
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★ 6.8
Yuragi-sou no Yuuna-san OVA
OVA · 2018
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★ 6.2
BUILD-DIVIDE -#000000- CODE BLACK
TV · 2021
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★ 7.4
Pop Team Epic Season 2
TV · 2022
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Airing
A Returner's Magic Should be Special Season 2
TV · 2026
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★ 7.7
Non Non Biyori: Repeat - Hotaru ga Tanoshinda
OVA · 2016
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★ 8.0
Girls und Panzer das Finale - Part 2
MOVIE · 2019
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★ 6.0
Gal & Dino
TV · 2020
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★ 6.4
Lostorage incited WIXOSS
TV · 2016
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★ 6.9
Mikakunin de Shinkoukei: Kamo Nikutte Midori-ppoi Aji ga suru no ne.
OVA · 2014
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★ 7.0
Cencoroll 2
MOVIE · 2019
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★ 6.7
Cardfight Vanguard
TV · 2011
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★ 5.8
Vatican Miracle Examiner
TV · 2017
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★ 8.0
Non Non Biyori Nonstop: Our Club Worked Hard
OVA · 2022
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★ 6.8
Papa no Iukoto wo Kikinasai!: Pokkapoka
SPECIAL · 2012
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★ 7.4
Sand Land: The Series
ONA · 2024
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★ 6.5
Hinata no Aoshigure
MOVIE · 2013
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★ 6.8
Lostorage conflated WIXOSS
TV · 2018
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★ 6.4
Fate/strange Fake TVCM
SPECIAL
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★ 6.5
Aki no Kanade
MOVIE · 2015
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★ 6.9
Genshiken Second Generation OVA
OVA
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★ 7.0
planetarian: Snow Globe
OVA · 2021
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★ 7.9
Thunderbolt Fantasy: Sword Travels in the East
TV · 2016
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★ 6.4
Drucker in the Dugout
TV · 2011
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★ 6.2
Yuri Seijin Naoko-san (2012)
OVA · 2012
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★ 6.3
ARGONAVIS from BanG Dream!
TV · 2020
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★ 6.2
Innocent Venus
TV · 2006
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★ 6.3
Kujima: Why Sing, When You Can Warble?
TV · 2026
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★ 5.1
WIXOSS DIVA(A)LIVE
TV · 2021
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★ 6.3
HANAUKYO Maid Team: La Verite
TV · 2004
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★ 6.5
Starship Operators
TV · 2005
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★ 4.7
Lychee Light Club
TV SHORT · 2012
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★ 7.0
Shashinkan
MOVIE · 2013
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★ 5.5
Phantom of the Kill: ZERO Kara no Hangyaku
MOVIE · 2016
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★ 5.6
Genjitsu no Rimuru: SUNSHINE in the SLIME
ONA · 2023