Kotaro Lives Alone Characters & Voice Actors

Kotaro Lives Alone Characters & Voice Actors

When Kotaro Lives Alone finally debuted in March 2022, it became a global phenomenon, with the Internet being full of information and questions about certain aspects of the series. Kotaro Lives Alone has a lively cast of characters and the voice actors behind them; this is why they are going to be the focus of this article.

You’re going to find out some basic piece information on all major characters, as well as their voice actors.

Kotaro Satо̄ 


Voice Actor: Rie Kugimiya

A four-year-old boy who lives alone in room 203 of the Shimizu apartment for a reason. He is able to clean, wash and cook by himself. He speaks like a young lordling in imitation of his favorite anime, Tonosaman.

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Rie Kugimiya (born May 30, 1979 in Kumamoto, Japan) is a Japanese seiyū, affiliated with I’m Enterprise. She voices main characters in successful anime such as Alphonse Elric in Fullmetal Alchemist, Happy in Fairy Tail, and Kagura in Gintama, but is best known as “the queen of the tsundere” because of her excellent interpretation of this type of character like Nagi in Hayate the Combat Butler, Shana in Shakugan no Shana, Louise in Zero no tsukaima, Lotte in Astarotte no omocha, Taiga in Toradora!, Iori in The Idolmaster and Aria H. Kanzaki in Hidan no Aria.

In high school, she was a member of a radio show club and was responsible for making announcements for her school’s events. Because of the compliments of her comrades who find her gifted, and because she likes to read tales, she decides to become a seiyû. Her career is prolific and she is recognized as one of the best in her profession.

Notable Work: Rizel Iwaki in Rizelmine, Alphonse Elric in Fullmetal Alchemist, Hina in Guardian Hearts, Hotaru Imai in Gakuen Alice, Momo Nishimiya in Jujutsu Kaisen, Kagura in Gintama, Aria H. Kanzaki in Hidan no Aria, Rise Kujikawa in Persona 4: The Golden Animation, Juuzou Suzuya in Tokyo Ghoul, Louise Françoise Le Blanc de la Vallière in Zero no tsukaima ~ F, Tet in No Game No Life

Susumu Karino

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Voice Actor: Toshiki Masuda

An unsuccessful manga artist who lives in room 202 of the Shimizu apartment. He often watches Kotaro, goes with him to the public baths and accompanies him to kindergarten.


Toshiki Masuda (Hiroshima Prefecture, Japan, March 8, 1990) is a Japanese seiyū, stage actor and singer, formerly affiliated with Space Craft Group. Some of his best-known roles include Chikara Ennoshita in Haikyū!!, Gou Wakabayashi in Daiya no Ace, Kōtarō Hayama in Kuroko no Basket, Ryū Zaō in Binan Kōkō Chikyū Bōei-bu Love!, Eijirō Kirishima in My Hero Academia, Atom Kirihara in Marginal#4: Kiss kara Tsukuru Big Bang and more recently, Masahiro Setagawa in Hitorijime My Hero and Iori Izumi in Idolish7.

Masuda was born on March 8, 1990 in Hiroshima, Japan. His family consists of his father, mother, and a younger brother. He was interested in acting from a very young age and during high school he wanted to become a voice actor, after watching the anime series Code Geass and Tengen Toppa Gurren Lagann, the latter of which piqued his interest in said area.

In 2008, he moved to Tokyo and entered the broadcasting department of Tokyo Announce Gakuin Performing Arts College. In 2009, he auditioned for The Prince of Tennis musicals and was cast in the role of Seiichi Yukimura, this being his debut role. In September 2010, Masuda decided to give up theater for a while and focus on voice acting, so he was transferred to the voice acting division of his agency, Space Craft.


15 Anime Like Kotaro Lives Alone Every Fan Needs to See

He began his activities as a voice actor in October, as an assistant on the A&G Artist Zone 2h radio show. In April 2011, Masuda landed his first regular role in an anime series, Yu-Gi-Oh! ZEXAL, playing Ryōga Kamishiro. In October 2011, Masuda and fellow voice actor Yoshimasa Hosoya starred in a radio show titled Hosoya Yoshimasa ・ Masuda Toshiki no Zenryoku Danshi, which ran until March 31, 2013.

In February 2012, Masuda and Hosoya also formed a unit called “MaxBoys” and released a CD. In 2013, he voiced the main character Masayoshi Hazama / Samurai Flamenco in the Samurai Flamenco series, while in 2014 Chikara Ennoshita in Haikyū!!. In 2015, he played Ryū Zaō in Binan Kōkō Chikyū Bōei-bu Love! and in its subsequent sequel in 2016. In 2017, he landed the lead role of Masahiro Setagawa in Hitorijime My Hero.

Notable Work: Ryōga Kamishiro in Yu-Gi-Oh! Zexal, Chikara Ennoshita in Haikyū!!, Charanko in One-Punch Man, Kurusu in Kabaneri of the Iron Fortress, Eijiro Kirishima in My Hero Academia, Porco Galliard in Attack on Titan

Isamu Tamaru

Katora Lives Alone Season 2

Voice Actor: Junichi Suwabe

A man living in room 102 of the Shimizu apartment. Despite his intimidating appearance, he loves children and is infatuated with Kotaro.


Junichi Suwabe is a Japanese seiyu. He is affiliated with Haikyou, covering the following areas: the work of announcers, radio hosts, DJs, and voice actors for anime and games characters. The main areas of work are dubbing anime, video games, Drama CDs, dubbing foreign films into Japanese. In addition to voicing anime characters, Suwabe also works as an announcer.

Since March 25, 2009, he has been a member of the PHERO☆MEN seiyu unit along with Toriumi Kosuke. In the period from 2002 to 2013, the seiyu unit was called “Nazo no Shin Unit STA☆MEN” and consisted of 7 people: Suwabe Junichi, Toriumi Koshimura, Kisho Daisuke Yasumura Makoto, Yoshino Hiroyuki. He was nominated for “Best Song Performance” at the 6th Seiyu Awards, and won the “Best Supporting Actor” award at the 7th Seiyu Awards.

Notable Work: Omega zero in Megaman Zero 3, Keigo Atobe in The Prince of Tennis, Victor Nikiforov in Yuri!!! on ICE, Grimmjow Jaegerjaquez in Bleach, Freed Justine in Fairy Tail, Yami Sukehiro in Black Clover, Ryomen Sukuna in Jujutsu Kaisen, Archer in Fate/stay night, Ren Jinguji in Uta no Prince-sama, Undertaker in Black Butler, Leone Abbacchio in JoJo’s Bizarre Adventure: Golden Wind, Daiki Aomine in Kuroko’s Basketball, Jurota Shishida and Shōta Aizawa in My Hero Academia, Dandy in Space Dandy, Sakunosuke Oda in Bungo Stray Dogs, Bercouli Synthesis One in Sword Art Online, Akira Hayama in Food Wars! Shokugeki no Soma

Mitsuki Akimoto

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Voice Actor: Saori Hayami

A young woman who lives in room 201 of the Shimizu apartment. She is always in a good mood and often invites Kotaro to tea.


Saori Hayami is a Japanese voice actress and singer. She is affiliated with I’m Enterprise. Saori Hayami was born on May 29, 1991 in Tokyo. The decision to choose a future profession was born to Hayami during his elementary school years, but was prompted by watching Japanese dubbed films with Audrey Hepburn at an earlier age with his mother.

Saori noticed and then realized that the voice acting of foreign actors does not always match their facial expressions, and that similar cases occur in anime series, and wanted to try her hand as a seiyuu. Hayami became interested in where to get a specialized education, and learned about the school at the Japan Institute of Acting, which was recruited from the fourth grade.

After listening to the opinion of her parents, who warned Saori about the difficulties of the seiyu world, Hayami did not change her mind and entered an educational institution from the first year of high school. One of Saori’s teachers was seiyuu Miki Narahashi. In March 2006, Hayami successfully auditioned for I’m Enterprise.

The first work at a professional level was the voice acting of the character Sumire Mido in the radio show based on the My Lovely Robot franchise, and in April 2007 he made his debut in the Toka Gettan anime series as Momoka Kawakabe. In 2009, Hayami first tried herself as a singer, performing in a duet with Hitomi Yoshida the opening and ending compositions for the series Sora no Otoshimono. Subsequently, this duet was called blue drops.

In 2011, Hayami began her career as a radio host on Hayami Saori no Furi〜Suteiru♪ on internet radio station Cho! A&G+. In 2015, Saori released her first single, “Yasashi Kibo”, which was the opening song for the anime Snow White with the Red Hair. At the end of August of that year, the song managed to climb to number 11 on the Oricon charts.

In 2016, the song was featured on her first solo album, Live Love Laugh, which climbed immediately after reaching number 6 on the Oricon charts. At the end of 2015, Saori Hayami won the Seiyu Awards for Best Supporting Actress for voicing Yotsugi Ononoka in Owarimonogatari and Haruki Ogasawara in Sound! Euphonium.

Notable Work: Yukino Yukinoshita in My Youth Romantic Comedy Is Wrong, As I Expected, Yumeko Jabami in Kakegurui – Compulsive Gambler, Musubi and Yume in Sekirei, Kamisato Ayaka in Genshin Impact, Ayase Aragaki in Oreimo, Shirayuki in Snow White with the Red Hair, Yui Kusanagi in Ludere Deorum, Cardia in Code: Realize − Guardian of Rebirth, Miyuki Shiba in The Irregular at Magic High School, Himawari Uzumaki in Boruto: Naruto Next Generations, Shinoa Hiiragi in Seraph of the End, Yotsugi Ononoki in Monogatari, Shōko Nishimiya in A Silent Voice, Chiriko “Tsuruko” Tsurumi in Anohana: The Flower We Saw That Day, Ushiwakamaru in Fate/Grand Order, Shinobu Kochou in Demon Slayer: Kimetsu no Yaiba, Rachel in Tower of God, and Yamato in One Piece

Ayano Kobayashi

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Voice Actor: Yumiri Hanamori

Ayano Kobayashi is a secondary character, a lawyer that handles Kotaro’s case.


Yumiri Hanamori (Kanagawa Prefecture, Japan, September 29, 19971) is a Japanese voice actress. She is affiliated with the talent agency m&i. Hanamori used the alias Rimiyu in her debut, The Second Audition. When Hanamori was in her second year of high school, her friend encouraged her to try voiceover as a career choice, sparking Hanamori’s interest in voice actors. In 2015, Hanamori was Radio Flush’s 62nd personality.

In 2016, Hanamori made her anime film debut in Garakowa: Restore the World, where she played Remo, the female lead. On October 22, 2015, Hanamori walked the red carpet with producer Masashi Ishihama and Ryoichi Ishihara as Garakowa‘s voice part at the Tokyo International Film Festival. Hanamori was affiliated with Pony Canyon Artists/Swallow. In 2017, Hanamori changed her affiliation to m&i.

Notable Work: Hinaki Ubuyashiki in Demon Slayer, Ai Hayasaka in Kaguya-sama: Love is War, Evileye in Overlord, Zero in Grimoire of Zero, Sachiko Umemoto in Ace of Diamond


aota kotaro lives alone 1

Voice Actor: Soma Saito

Aota is a supporting character and one of Kotaro’s neighbors.


Sōma Saitō (Kōfu, 22 April 1991) is a Japanese voice actor and singer, affiliated with 81 Produce and Sacra Music. Saitō was born on April 22, 1991 in Kōfu, Yamanashi Prefecture, Japan. He is the eldest of three brothers, with two younger sisters. He started wanting to be a voice actor in high school, inspired by Akira Ishida’s role as Koyemshi in Bokurano.

Previously, he wanted to become a musician or a novelist. Saitō attended 81 Produce’s second audition in 2008. That audition was attended by a total of 1,035 people, of whom only 33 made it to the final, and the winner would be chosen for a training period in the talent agency. He won the audition for the male category and started taking voice acting lessons at 81 ACTOR’S STUDIO afterward while still in high school.

In 2009, Saitō won the “Special Award for Judges” in the acting competition at the 33rd National School Comprehensive Cultural Festival. Veteran voice actress Nobuyo Ōyama was one of the judges present at the time. He began his career as a voice actor in 2010, playing minor roles in some anime and video games. He paid less attention to his career as a voice actor during his first two years to focus on his studies at Waseda University.

After graduating in 2014, he began to fill more important roles. The first major role he landed through auditioning was Tasuku Ryuenji in the animated series Future Card Buddyfight. In the same year, Saitō landed other major roles such as Tadashi Yamaguchi in the animated series Haikyu !!, Tatsumi in the animated series Akame ga Kill !, and Twelve in the animated series Terror in Resonance.

At the 9th Seiyu Awards in 2015, Saitō won the “Best Male Novice Voice” award for his role as Twelve in the animated series Terror in Resonance. He shared the award with Ryōta Ōsaka and Natsuki Hanae. In March 2019, he and the other members of Hypnosis Mic received a singing award at the 13th Voice Actor Awards. Saitō made his debut as a solo artist in 2017, with Sacra Music.

He released his first single “Fish Story” on June 7, 2017. Her second single “Yoake wa Mada / Hikari Tatsu Ame” was released on September 6, 2017. The song “Hikari Tatsu Ame” was used as the opening theme for Katsugeki / Touken Ranbu. Saitō released his third single “Date” on June 20, 2018. For his third single, he took on the writing duties, writing lyrics and music for all the songs featured.

Saitō released his first album, “quantum stranger”, on December 19, 2018. On February 24, 2019, Saitō held his first live concert titled “Saitō Sōma 1st LIVE quantum stranger (s)” in the Maihama Amphi Theater. A blu-ray edition of the concert was released on June 5th of the same year as the concert.

Notable Work: Tatsumi in Akame ga Kill!, Twelve/Tōji Hisami in Terror in Resonance, Tadashi Yamaguchi in Haikyū!!, Mukai Taiyou in Ace of Diamond, Corteo in 91 Days, Yamagi Glimerton in Mobile Suit Gundam: Iron-Blooded Orphans, Jimsa in The Heroic Legend of Arslan: Dust Storm Dance, Hermes in Is It Wrong to Try to Pick Up Girls in a Dungeon?: Sword Oratoria, Jun Misugi in Captain Tsubasa, Vinegar Doppio in JoJo’s Bizarre Adventure: Golden Wind, Fuyuto Kyogoku in Case File nº221: Kabukicho, William James Moriarty in Moriarty the Patriot, Yuran Goha in Yu-Gi-Oh! Sevens, Shōma in Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town