Kōtarō Nishiyama

is a Japanese voice actor and singer from Kanagawa Prefecture, Japan. He is currently affiliated with 81 Produce. 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.

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. In 2009, while in high school, he participated in NHK's nationwide high school broadcast competition.

In 2009, he participated in the 3rd 81 Audition and won a special award, after which he entered 81 Produce's training school. 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.

In 2016, Nishiyama released his first personal book Nishiyama-san Chi no Koutaro-kun. In 2017, he published a photo essay book Tarorizumu. 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.

Filmography

Anime

Video games + List of voice performances in video games Year Title Role Notes Source So Cute it Hurts!! Todo-kun藤堂くん DS 2015Cute High Earth Defense Club Love! Game!Atsushi Kinugawa 2015100 Sleeping Princes and the Kingdom of DreamsXiao Riel

Kanata Shinkai

Koya Morotomiya 2018Namu Amida Butsu! -Rendai UTENA-Koumokuten, Mekira Taisho

Drama CD +List of voice performances in drama CDTitleCharacterEinsatzKotoyo ShinohoriMahou x Shōnen x Days!!!!! Volume 1StudentLove Nette Tune Type-05 HiganbanaHiganbanaIroiro atta ne. ~Supadari shōnika-i Misuzu Yoshinori no baai~Yoshinori MisuzuOhayō kara oyasumi made dai 2-dan toshokan no koi ~bungaku shōjo no madobe~ Satoshi HarimaGakuen BabysittersRyūichi KashimaSolidS drama CD Volume 2 "-Two of a kind.-"Eichi HorimiyaTutti! Frutti!Yūki Satake Yoidore no no no vol. 1 ~Kon'na senpai mita koto nai~Ryō SawanoiOtodoke Kareshi Cherish Vol.2Tamaki HyojoB-PROJECT KING OF CASTE ~Sneaking Shadow~Yuduki TeramitsuGET UP! GET LIVE! Steam RisingKaede HigashizawaMy New Boss is GoofyKentaro Momose +List of voice performances in BLCDTitleCharacterAi no mitsu ni yoe!AritaAnata wa taidade yūgaSenior student, menImmoral TriangleKurota ShinozakiSmells Like Green SpiritStudentHang Out CrisisShinya HasumiRaveled Tightrope KnotKariyaHitorijime BoyfriendJirō YoshidaEmpty SweetieYukiAmbivalenceAoto KujiJackass!HosakaBlue Sky ComplexHarukawaLala no Kekkon Vol.2 Lala's husbandTashiro-kun, Kimitte Yatsu waMaru

Dubbing + List of voice performances in dubbing Year Title Role Notes Source 2018 School of Rock Lawrence Dooley 2023-2026Thomas & Friends: All Engines GoKenji

Variety shows

Publications

Photobooks

Discography

Extended plays

+ List of extended plays, with selected chart positions, sales figures and certificationsTitleYearAlbum details JPNOricon JPNHot Sales CertificationsCity 2020 Released: October 7, 2020 Label: Lantis Formats: CD, digital download 7 9 JPN: 10,497 (physical) JPN: 9,894 (downloads & streaming) Laundry2021 Released: July 21, 2021 Label: Lantis Formats: CD, digital download 16 - -N/AMy Bag2025 Released: March 14, 2025 Label: Lantis Formats: CD, digital download 37 - JPN: 1,445 "—" denotes releases that did not chart or were not released in that region.

Awards YearAwardResult 2009 3rd 81 Audition Special Award 201812th Seiyu Awards for Best Newcomer Actor