Kuro Kiyosumi

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Kuro Kiyosumi
SideM Character Data
Name: 清澄九郎 (Kiyosumi Kuro)
Voice actor: 中田祐矢 (Nakada Yuya)
Age: 19
Height: 178 cm
Weight: 67 kg
Shoe Size: 26.5 cm
Birthday: July 3rd
Blood type: A
Hobbies: Collecting bath salts
Skills: Playing karuta, Fan-tossing
Handedness: Right
Horoscope: Cancer
Hometown: Kamakura, Kanagawa
Ex-Job: Tea Ceremony Preparer
Card Type: Mental
Image Color:     
Kuro sig.png

Kuro Kiyosumi (Japanese: 清澄九郎 Kiyosumi Kuro) is one of the available idols in the mobile game THE iDOLM@STER SideM. He is voiced by Yuya Nakada (中田祐矢 Nakada Yuya).


SideM Biography

-The stoic tea-lover of worldly wisdom and unen-Kuro-chable morals!-
"I will spread the ways of the tea ceremony, the very spirit of Japan!"

SideM Idol File

Reasons for Becoming an Idol: I thought, if I could be the one to spread the spirit of tea ceremonies and harmony to today’s generation...

Personal Motto: Nothing ventured, nothing gained.

Comments for the Future: In order to spread the importance of tea ceremonies to all in this day and age, I felt a more modern method was imperative... It is that very thought that spurred me to become an idol. I believe it is time for me to take my first step into this novel, new world before my eyes.

Comments about Unit Members: Onstage, Nekoyanagi-san and Hanamura-san are nothing short of proper gentlemen, so why is it that the second they come off stage they turn into such slovenly... My most gracious apologies, how rude of me... Please disregard that.


-From tea ceremony preparer to idol!-
"We are ready to depart. Now let us go."


Kuro is a reserved and stoic young man who often behaves less like a teenager and more like a middle-aged person. Though polite and cordial in formal situations, he’s clueless and uncomfortable during casual interactions due to his sheltered upbringing. He’s extremely out of touch with modern society; he frequently talks about “the youth” despite being young himself, and he struggles to understand the nuances of popular culture. He is surprisingly open-minded and willing to try new things despite this, as he believes traditions such as the tea ceremony must adapt in order to survive. Unfortunately for his unit, his fascination with the modern world sometimes manifests itself in verbose and confusing monologues.

Beneath his cool exterior, Kuro is surprisingly hot-blooded. Although he usually serves as the rational head in Sai’s antics, he is easily swept up in competition and prone to making rash decisions when he becomes engrossed in a game. His competitiveness extends to his idol duties as well, and as a result he possesses an incredibly strong work ethic. He believes skill isn’t something one is born with, but rather the product of rigorous practice and work; the word “talent,” in his opinion, is only used to make the situation more palatable. This attitude often causes him to overwork himself, as he views himself as Sai’s weakest link due to his inexperience, but encouragement from his unit has helped him gain more self-confidence over time.

Kuro’s overly serious demeanor makes him an easy target for Shoma and Kirio’s pranking, and he’s notoriously short-tempered. He often nags his unit for making a mess or not taking things seriously. However, he’s warm-hearted under his awkwardness; his scolding is well-intentioned, and, even then, he’s become significantly less harsh since Sai first formed. He won’t hesitate to give advice and tough love to those who need it, and he enjoys making tea for his colleagues to cheer them up.


Kuro is the youngest in a long line of tea ceremony preparers. His family is rather wealthy and well-known for its tea, so he believes his path in life was decided for him when he was born into the Kiyosumi name. Regardless, he still holds a deep love for the art of the tea ceremony, a love he says first emerged in an incident in his childhood where he accidentally broke one of his father’s favorite tea bowls. His father, instead of chastising him, repaired the ceramic with gold lacquer. Kuro was fascinated by the process as well as the resulting piece of art, and remembers the incident as the first time he was moved by tea ceremonies.

Prior to becoming an idol, Kuro had already been making attempts to educate laypeople about tea ceremonies by organizing community tea ceremony lessons against the wishes of his grandfather. He was approached by the Producer after one of these lessons and offered a job with 315 Production. Although he initially believed the idol world was one with no place for him in it, after getting into an argument with his grandfather, he resolved to spread the way of tea by any means necessary and decided to sign a contract, despite not fully understanding what being an idol would entail.

Kuro dislikes talking about his family and becomes stressed whenever the subject is mentioned. However, this is less due to resentment and more due to the fact that he values his family, so their disapproval of his actions and the resulting strain on their relationship pain him immensely. In the Deep Green event, he confronted his grandfather at a tea ceremony campaign gathering. Although his grandfather's disapproval remained unchanged, he admitted that Sai was effective in encouraging interest in tea ceremonies. Kuro was encouraged by this exchange, and he continues to hope that he can continue to make amends with his family and one day earn their full endorsement.

Game Discography

Song Discography

Image songs

Nagaruru Kaze no Gotoku ~Wakeiseijaku~

Recorded Solo Songs

Recorded Solo Songs
Song Classification CD
Nagaruru Kaze no Gotoku ~Wakeiseijaku~ Solo song THE IDOLM@STER SideM ORIGIN@L PIECES 04
Sakurairo Kiyosumi Kuro Solo Remix THE IDOLM@STER SideM 3rd ANNIVERSARY SOLO COLLECTION 03
Friendly Smile Kiyosumi Kuro Solo Remix THE IDOLM@STER SideM WakeMini! SOLO COLLECTION 02 MENTAL Ver.
Shukusai! Kiyosumi Kuro Solo Remix THE IDOLM@STER SideM 5th ANNIVERSARY SOLO COLLECTION 04
Little Happiness Kiyosumi Kuro Solo Remix THE IDOLM@STER SideM PASSION@TE FORMATION -MENTAL-

Recorded Group Songs

Recorded Group Songs
Song CD Sung With
Kassai! ~Kachoufuugetsu~ THE IDOLM@STER SideM ST@RTING LINE-07 Sai Kirio Nekoyanagi and Shoma Hanamura
Wafuu Doudou! ~WAnderful NIPPON!~
Beyond The Dream THE IDOLM@STER SideM "Beyond The Dream" 315 ALLSTARS
315 Mental Idols
Sakurairo THE IDOLM@STER SideM 3rd ANNIVERSARY DISC 03 Sai & Shinsoku Ikkon & THE Kogadou Kirio Nekoyanagi and Shoma Hanamura
Egao no Matsuri nya, Fuku Kitaru Kirio Nekoyanagi, Shoma Hanamura, Genbu Kurono, Suzaku Akai, Takeru Taiga, Ren Kizaki and Michiru Enjoji
Friendly Smile THE IDOLM@STER SideM WakeMini! MUSIC COLLECTION 02 315 STARS (Mental Ver.)
Purely&Kindly THE IDOLM@STER SideM WORLD TRE@SURE 07 Kyosuke Aoi, Pierre, and Natsuki Sakaki
Shukusai! THE IDOLM@STER SideM 5th ANNIVERSARY DISC 05 Altessimo & Sai & High×Joker Kirio Nekoyanagi and Shoma Hanamura
Singing Explorers Altessimo, Sai, and High×Joker
Yuukan Naru Kimi e THE IDOLM@STER SideM Struggle Heart 2 Original CD Kirio Nekoyanagi and Shoma Hanamura
Sou -So Beautiful- THE IDOLM@STER SideM NEW STAGE EPISODE:14 Sai Kirio Nekoyanagi and Shoma Hanamura
NEXT STAGE! (Sai Ver.)
Growing Smiles! THE IDOLM@STER SideM GROWING SIGN@L 01 Growing Smiles! 315 ALLSTARS
Beyond The Dream
Little Happiness THE IDOLM@STER SideM PASSION@TE FORMATION -MENTAL- 315 Mental Idols
Itowokashi! ~Issai×Gassai~ THE IDOLM@STER SideM GROWING SIGN@L 06 Sai Kirio Nekoyanagi and Shoma Hanamura
Irodori no Uta

Trivia and Fan Culture


  • He enjoys solitude and there is little that brings him more pleasure than taking time to himself in the bath. He collects bath products and has received some from fans, although he feels it would be a waste to use them so he keeps them as decoration in his room.
  • Although he became an idol to foster interest in Japanese culture, he isn’t ignorant regarding the rest of the world. He likes studying world history and trying tea from abroad.
  • He’s easily frightened, particularly of ghosts.
  • He loves sweets, but detests shiitake mushrooms. His hatred is so strong that he expresses disgust (and sometimes anger) at the mere mention of them.
  • He has excellent hand-eye coordination. His skillset includes tosenkyo (fan-tossing), karuta, throwing darts, table tennis, and goldfish scooping.
  • He has at least two goldfish he’s caught at festivals. He is fond of horses as well.
  • After the “Rainbow After the Rain” mobage event, he’s become friends with fellow tea-lover Yukihiro Kamiya. They talk often, and he says he likes to hear Kamiya’s stories.
  • Kuro is part of the unofficial unit 19歳組 (lit. 19 year old group, often shortened to 19gumi by English-speaking fans), alongside Sora and Kazuki. The three share similar themes of being true to themselves due to their age, and have a joint calm and mature aura. They featured in an event together in Write for someone ~A Reminiscent Sky~, fittingly set in 19th century London.
  • He shares the same birthday with Yoshino Yorita.

Fan Culture

Character Gallery


SideM Cards