Koutaro Nishiyama

Koutaro Nishiyama (西山 宏太朗, Nishiyama Kōtarō; born October 11, 1991) is a Japanese voice actor and singer from Kanagawa Prefecture, Japan. He is currently affiliated with 81 Produce.^[1] His major roles are Atsushi Kinugawa in Cute High Earth Defense Club Love!, Sakutaro Kirara in Jewelpet: Magical Change, Kazunori Uesugi in Tantei Team KZ Jiken Note, Yoshiharu Hisomu in Kiznaiver and Ryūichi Kashima in School Babysitters. In 2018, he won the Best New Actor Award at the 12th Seiyu Awards.^[2]

Koutaro Nishiyama
西山 宏太朗
Nishiyama at Nerima Anime Carnival 2018
Born	October 11, 1991 (1991-10-11) (age 33) Yokohama, Kanagawa Prefecture, Japan
Occupation	Voice actor
Years active	2011 - present
Agent	81 Produce
Musical career
Genres	J-pop
Instrument	Vocals
Years active	2020–present
Labels	Lantis
Website	https://www.lantis.jp/nishiyamakoutaro/

Biography

Nishiyama wanted to work using his voice since his 6th year of elementary school; in junior high school, he was suggested by a friend to become a voice actor. During high school, he participated in the Creative Course (which included voice actor and broadcast major) of his school.^[3] In 2009, while in high school, he participated in NHK's nationwide high school broadcast competition.^[4]

In 2009, he participated in the 3rd 81 Audition and won a special award, after which he entered 81 Produce's training school.^[5] In May 2011, he joined the company 81 Produce. In 2015, he launched the entertainment group "Ooimachi Cream Soda" along with Reona Irie and Yuu Taniguchi. As part of Ooimachi Cream Soda, Nishiyama also acts in various stage plays.^[6]

In 2016, Nishiyama released his first personal book Nishiyama-san Chi no Koutaro-kun.^[7] In 2017, he published a photo essay book Tarorizumu.^[8] In 2018, he won the Best New Actor Award at the 12th Seiyuu Awards. Nishiyama shared the award with Taku Yashiro and Shun Horie.

In 2020, Nishiyama made his debut as singer from Lantis with mini album CITY.^[9]

Filmography

Anime

List of voice performances in anime

Year	Title	Role	Notes	Source[10]
2012	Sankarea: Undying Love	Well-rounded man		[11]
2012	Accel World	Man 1		[11]
2012	Kokoro Connect	Male student		[11]
2012	Beyblade: Shogun Steel	Blader B
2013	The Severing Crime Edge	Schoolboy		[11]
2013	Hayate the Combat Butler! Cuties	Staff		[11]
2013	Stella Women's Academy, High School Division Class C3	Enemy, customer		[11]
2013	Voice Acting Sentai Boystome 7 ja:声優戦隊ボイストーム7	Delusion beast coryge 妄想獣コージ		[11]
2014	D-Frag!	Matsuhisa		[11]
2014	No-Rin	Student		[11]
2014–15	Haikyū!! series	Kazuhito Narita, Kawashima		[11]
2014	Free!	Toru Iwashimizu		[11][12]
2014	Blue Spring Ride	Junior high school boy		[11]
2014	When Supernatural Battles Became Commonplace	Student		[11]
2014	Psycho-Pass 2	Man		[11]
2014	Your Lie in April	Soccer club member		[11]
2015–17	Cute High Earth Defense Club Love!	Atsushi Kinugawa	Also LOVE! LOVE! (Season 2), LOVE! LOVE! LOVE! (OVA)	[11][13]
2015	The Disappearance of Nagato Yuki-chan	Baseball staff, male teacher		[11]
2015	Jewelpet: Magical Change	Sakutaro Kirara		[14]
2015	Rin-ne	Boy		[11]
2015	Overlord	Bellote		[11]
2015	Noragami Aragoto	Suzuha		[11][15]
2015	Star-Myu	Student		[11]
2015	Tantei Team KZ Jiken Note	Kazunori Uesugi		[11][16]
2016	Haruchika	Kōji Iwasaki		[11]
2016	Kiznaiver	Yoshiharu Hisomu		[11][17]
2016	High School Fleet	Oga		[11]
2016	Servamp	Koyuki		[11]
2016	Fudanshi Kōkō Seikatsu	Daigo		[11]
2016	91 Days	Frate Vanetti		[11][18]
2016	Time Travel Girl	Leone レオーネ		[11]
2016	All Out!!	Yuto Keta		[11]
2016	Whistle! 2016 Version	Yūsuke Morinaga		[19]
2017	Sagrada Reset	Hitsūchikun		[11]
2017	Nui Nui Hinobori San Kyoudai	Aoi Hinobori	Web anime	[20]
2017	Blame! (film)	Shige	Theatrical film
2017	Free!-Timeless Medley- the Promise	Toru Iwashimizu	Theatrical film
2017	Warau Salesman NEW	Tomoyoshi Doraki		[21]
2017	Convenience Store Boy Friends	Keiichi Miki		[22]
2017	TSUKIPRO THE ANIMATION	Eichi Horimiya		[23]
2017	Karada Sagashi (ONA)	Shōta Uranishi	ONA	[24]
2017	100 Sleeping Princes and the Kingdom of Dreams: Short Stories	Xiao	ONA	[25]
2017	Sengoku Night Blood	Masatoyo Naitou		[26]
2018	School Babysitters	Ryūichi Kashima		[27]
2018	Hataraku Oniisan!	Angoramori-senpai		[28]
2018	Major 2nd	Hikaru Satō		[29]
2018	Moshi Moshi, Terumi Desu	Rintarō		[30]
2018	The Thousand Musketeers	Lorenz		[31]
2018	Mr. Tonegawa: Middle Management Blues	Toshimasa Kawasaki		[32]
2018	Zoids Wild	Garlic		[33]
2018	Skull-face Bookseller Honda-san	Kendo		[34]
2018	Ace Attorney Season 2	Yūsaku Amasugi
2019	B-PROJECT: Zecchou Emotion	Yuduki Teramitsu
2019	The Price of Smiles	Alan
2019	I'm From Japan	Tokio Abiko		[35]
2019	Mix	Ryō Akai
2019	Million Arthur (TV series)	Andy
2019	Ensemble Stars!	Kanata Shinkai		[36]
2019	BEM	Roddy Walker		[37]
2019	Stand My Heroes: Piece of Truth	Kyōsuke Tsuzuki		[38]
2020	A3! Season Spring & Summer	Tsuzuru Minagi
2020	Sing "Yesterday" for Me	Amamiya
2020	Get Up! Get Live!	Kaede Higashizawa		[39]
2020	Major 2nd Season 2	Hikaru Satō/ Hikaru Sakaguchi
2020	Sakura Kakumei ~Hana Saku Otome-tachi~ Special Animation	Yoshitaka Ooishi	ONA	[40]
2020	Aware! Meisaku-kun	Tsumire		[41]
2021	I-Chu: Halfway Through the Idol	Saku Uruha
2021	MAZICA PARTY	Silver		[42]
2021	Dragon Goes House-Hunting	Archer		[43]
2021	Re-Main	Eitarō Oka		[44]
2021	TSUKIPRO THE ANIMATION 2	Eichi Horimiya
2021	Muteking the Dancing Hero	Winter		[45]
2021	The Vampire Dies in No Time	Sagyō		[46]
2021- 2023	IDOLiSH7 Third Beat!	Minami Natsume	(also Part 2)	[47]
2022	The Heike Story	Emperor Takakura		[48]
2022	Fushigi Dagashiya Zenitendō	Tetsushi Soga
2022	Kotaro Lives Alone	Tamamori	ONA	[49]
2022	She Professed Herself Pupil of the Wise Man	Eisenfald
2022	Dance Dance Danseur	Yamato Takura		[50]
2022	Aoashi	Junnosuke Nakano		[51]
2022	Heroines Run the Show	Third year male student B
2022	Shoot! Goal to the Future	Fuyi Itoda
2022	Penpe to Pinpi	Penpe	ONA, also director and screenwriter	[52]
2022	Roly Poly Peoples	Roly	ONA	[53]
2023	The Vampire Dies in No Time Season 2	Sagyō		[46]
2023	HIGH CARD	Jasper Libera		[54]
2023	The Tale of the Outcasts	Shura		[55]
2023	The Ancient Magus' Bride Season 2	Isaac Farrar		[56]
2023	Mix: Meisei Story Season 2	Ryō Akai
2023	My Happy Marriage	Kōji Tatsuishi		[57]
2023	Case Closed	Takashi Nakajima
2023	The Tale of the Outcasts	Shura
2023	Ensemble Stars!! Tsuioku Selection 'Element'	Kanata Shinkai	ONA	[58]
2023	My New Boss Is Goofy	Kentarō Momose		[59]
2023	B-Project Passion*Love Call	Yuduki Teramitsu
2024	Egumi Legacy	Uninvited Guest		[60]
2024	Re:Zero season 3	Muse Kiritaka
2025	Cute High Earth Defense Club Eternal Love!	Atsushi Kinugawa	Theatrical film	[61]
2025	Everyday Host	Shin
2025	Wind Breaker	Takumi Momose
2025	Tougen Anki: Legend of the Cursed Blood	Jin Kougasaki		[62]
2025	With You, Our Love Will Make It Through	Yukihiro Aida		[63]

Video games

List of voice performances in video games

Year	Title	Role	Notes	Source[10]
2014	Haikyu!!	Kazuhito Narita	DS	[11]
2015	Ensemble Stars!	Kanata Shinkai		[64]
2015	So Cute it Hurts!!	Todo-kun 藤堂くん	DS	[11]
2015	Future Card Buddyfight: Explosive Fight of Friendship	Makoto Tsukimiya	DS	[65]
2015	Cute High Earth Defense Club Love! Game!	Atsushi Kinugawa		[66]
2015	100 Sleeping Princes and the Kingdom of Dreams	Xiao Riel Kanata Shinkai		[67] [68] [69]
2016	Yunohana Spring! ~Cherishing Time~	Soichiro Futaba		[11]
2016	Suuran Digit	Mitsu Nitou		[11]
2016	Cute High Earth Defense Club Love! Love! Game!	Atsushi Kinugawa		[70]
2016	I-Chu	Saku Uruha		[71]
2016	Icchibanketsu -ONLINE-	Mitsukuni		[72]
2016	Stand My Heroes	Kyōsuke Tsuzuki		[73]
2016	Granblue Fantasy	Wystom		[74]
2016	SOUL REVERSE ZERO	Allen		[75]
2016	Magic-kyun Renaissance	Tokiomi		[76]
2017	Akane Sasu Sekai de Kimi to Utau	Omoikane		[77]
2017	Idolish7	Minami Natsume		[78]
2017	A3!	Tsuzuru Minagi		[79]
2017	TSUKINO PARADISE	Eichi Horimiya
2017	Sengoku Night Blood	Masatoyo Naitou		[80]
2017	B-PROJECT Muteki*Dangerous	Yuduki Teramitsu		[81]
2017	Captain Tsubasa ~Tatakae Dream Team~	Leo		[82]
2017	Star Revolution ☆ 88 Seiza no Idol Kakumei	Senya Asahina		[83]
2017	Unnamed War 2099	Rumon Ishido		[84]
2018	Akatasuki no Epika -Union Brave-	Iglesia		[85]
2018	Tsumugu Logic	Sosei Morotomiya, Koya Morotomiya		[86] [87]
2018	Namu Amida Butsu! -Rendai UTENA-	Koumokuten, Mekira Taisho		[88] [89]
2019	Hoshinari Echoes	Sui Mizushiro		[90]
2019	BUSTAFELLOW	Alex		[91]
2020	Ensemble Stars!! Music	Kanata Shinkai
2020	Ensemble Stars!! Basic	Kanata Shinkai
2020	Granblue Fantasy	Justin		[74]
2020	Digimon ReArise	Bearmon		[92]
2020	Sakura Kakumei ~Hana Saku Otome-tachi~	Yoshitaka Ooishi		[40]
2020	Shokumonogatari	Kyoukadori
2021	B-PROJECT Ryusei*Fantasia	Yuduki Teramitsu
2021	Touken Ranbu	Himetsuru Ichimonji
2021	The Thousand Musketeers: Rhodoknight	Lorenz		[93]
2022	Yume Shokunin to Wasureji no Kuro Yousei	Gui
2022	Jujutsu Kaisen: Phantom Parade	Kaito Yūki		[94]
2022	Echoes of Mana	Kiruto

Drama CD

List of voice performances in drama CD

Title	Character
Einsatz	Kotoyo Shinohori
Mahou x Shōnen x Days!!!!! Volume 1	Student
Love Nette Tune Type-05 Higanbana	Higanbana
Iroiro atta ne. ~Supadari shōnika-i Misuzu Yoshinori no baai~	Yoshinori Misuzu
Ohayō kara oyasumi made dai 2-dan toshokan no koi ~bungaku shōjo no madobe~	Satoshi Harima
Gakuen Babysitters	Ryūichi Kashima
SolidS drama CD Volume 2 "-Two of a kind.-"	Eichi Horimiya
Tutti! Frutti!	Yūki Satake
Yoidore no no no vol. 1 ~Kon'na senpai mita koto nai~	Ryō Sawanoi
Otodoke Kareshi Cherish Vol.2	Tamaki Hyojo
B-PROJECT KING OF CASTE ~Sneaking Shadow~	Yuduki Teramitsu
GET UP! GET LIVE! Steam Rising	Kaede Higashizawa
My New Boss is Goofy	Kentaro Momose

List of voice performances in BLCD

Title	Character
Ai no mitsu ni yoe!	Arita
Anata wa taidade yūga	Senior student, men
Immoral Triangle	Kurota Shinozaki
Smells Like Green Spirit	Student
Hang Out Crisis	Shinya Hasumi
Raveled Tightrope Knot	Kariya
Hitorijime Boyfriend	Jirō Yoshida
Empty Sweetie	Yuki
Ambivalence	Aoto Kuji
Jackass!	Hosaka
Blue Sky Complex	Harukawa
Lala no Kekkon Vol.2	Lala's husband
Tashiro-kun, Kimitte Yatsu wa	Maru

Dubbing

List of voice performances in dubbing

Year	Title	Role	Notes	Source[10]
2012–2015	Thomas & Friends	Scruff		[11]
2013	The To Do List	Cameron Mitchell		[95]
2018	School of Rock	Lawrence Dooley		[96]
2023-	Thomas & Friends: All Engines Go	Kenji		[97]

Variety shows

Year	Network	Title	Remarks
2013 (October 5-December 28)	NTV	Voice Actor Sentai Boystome 7 "cafe*soffive"	Unit "soffive" member[98]
2014	TV Tokyo	Animemashite	Host [99]
2015	Tokyo MX	Tokyo Otome Restaurant Season 2 "Tokyo Otome Patisserie"	Host/Member[100]
2016	Tokyo MX	Eguchi Takuya no Oretachi Datte Iyasaretai!	Assistant
2016	Tokyo MX	Tsukipro ch.	Appearance/Member, season 2
2016	TV Tokyo	Animemashite	Narration
2016-2017	Tokyo MX	Eguchi Takuya no Oretachi Datte Motto Iyasaretai!	Assistant, season 2
2016-2017	Tokyo MX	Nishiyama Koutaro no Sukoyakana Bokura	Personality/MC
2017	Tokyo MX	Eguchi Takuya no Oretachi Datte Mo~tto Iyasaretai!	Assistant, season 3
2017	Tokyo MX	Saito Soma no Wagokoro wo Kimi ni	Narration
2017	Wowow, GyaO!	Sekai-kei Variety Bangumi Boku Koe	Acted in short drama "Kimi no●● ga Sekai o Sukutta koto o Kimi wa Nanimo Shiranai" as Shizuwa Ryuu
2018	Fuji TV	Shouta-sama to Shitsuji Nishiyama no Otawamure	Co-host with Shouta Aoi, Narration
2018	Tokyo MX	Nishiyama Koutaro no Sukoboku Peace	Personality/MC, season 2
2018	NHK BS Premium	Anisong! Premium! 2018	Co-host with Rika Adachi (studio talk part)
2019	Tokyo MX, Wowow, GyaO!	Sekai-kei Variety Bangumi Boku Koe Season 2	Acted in short drama "Kono Yadoya ni Tomari ni Kita Aitsu ga Kono Mura o Sukutte Kurerunja Ne?" as Yamanishi
2019	Tokyo MX	Eguchi Takuya no Oretachi Datte Yappari Iyasaretai!	Assistant, season 4
2019	Niconico, TV Saitama	LIPSS~ Innocent na Sasayaki~	Cast member
2020	Music On! TV	M-ON! SPECIAL "Nishiyama Koutaro" ~CITY~	Personality
2021	Fuji TV	Kaettekita Shouta-sama to Shitsuji Nishiyama no Otawamure	Co-host with Shouta Aoi, Narration

Publications

Photobooks

Year	Title	Publisher	ISBN
April 29, 2015	Binan Kōkō Chikyū Bōei-bu LOVE! Photobook "Battle Lovers no Nichijou"	Ponycan Books	ISBN 4865291423 ISBN 978-4865291421
April 28, 2016	Personal Book "Nishiyama-san Chi no Koutaro-kun"	Shufu to Seikatsusha	ISBN 4391148595 ISBN 978-4391148596
December 22, 2017	Photo Essay "Tarorizumu"	SHUFUNOTOMO	ISBN 4074269406 ISBN 978-4074269402
August 30, 2018	HACObook 2nd Season "Hansel to Gretel × Nishiyama Koutaro"	Movic	JAN 4549743240411
February 13, 2021	Photobook "Tarorinisuto"	SHUFUNOTOMO	ISBN 978-4-07-442212-8
June 29, 2023	Photobook "Taroritic"	SHUFUNOTOMO	ISBN 978-4074551088

Discography

Extended plays

List of extended plays, with selected chart positions, sales figures and certifications

Title	Year	Album details	JPN Oricon [101]	JPN Hot [102]	Sales [103][104]	Certifications
City	2020	Released: October 7, 2020 Label: Lantis Formats: CD, digital download	7	9	JPN: 10,497 (physical) JPN: 9,894 (downloads & streaming)	—
Laundry	2021	Released: July 21, 2021 Label: Lantis Formats: CD, digital download	16	-	-	N/A
My Bag	2025	Released: March 14, 2025 Label: Lantis Formats: CD, digital download	37	-	JPN: 1,445[105]
"—" denotes releases that did not chart or were not released in that region.

Awards

Year	Award	Result
2009	3rd 81 Audition Special Award	Won
2018	12th Seiyu Awards for Best Newcomer Actor	Won