Shiki Iseya

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Shiki Iseya
Shiki logo.jpg
SideM character data
Name: 伊瀬谷四季 (Iseya Shiki)
Voice actor: 野上翔 (Nogami Shou)
Age: 16
Height: 169 cm
Weight: 52 kg
Shoe Size: 25 kg
Birthday: April 12th
Blood type: A
Hobbies: Karaoke, Collecting flashy pants
Skills: Achieving any karaoke score at will
Handedness: Left
Horoscope: Aries
Hometown: Aomori
Ex-Job: Light Music Vocalist
Card Type: Physical
Image Color:     
Shiki sig.png

Shiki Iseya (伊瀬谷四季 Iseya Shiki) is one of the available idols in the mobile game THE iDOLM@STER: SideM. He is part of the unit High×Joker along with Haruna, Hayato, Natsuki, and Jun. He is voiced by Shou Nogami (野上翔 Nogami Shou).


Annual Rankings

Event Prelim Rank Final Rank
1st Anniversary Election 03 04
2nd Anniversary Election 01 01


SideM Biography

-I… I'll someday work hard so that I'll be recognized as a true band member~---!!-
"Hai! I'm Shiki Iseya Producer-chan. From now on, it may be a long term relationship, but mega nice to meet you!"

SideM Idol File

Reason For Becoming An Idol: Hayato-chi and his friends’ performance shook me to the core! That’s why!

Personal Motto: Always be bright and have fun☆

''Plans for the Future: First off, I wanna be recognized as a legit member of the band, especially by Jun-chi! After that, my goal is to be the BEST IDOL EVER, duh! YAY!

Regarding Unit Members: I’ve got a lotta respect for Hayato-chi’s performances and music! Jun-chi’s so smart, I’m kinda jealous. Natsuki-chi’s the kinda guy who loves cats, and I can respect that! Haruna-chi... I thought we were pretty tight, but his English is so much better than mine! Traitor!

Character Description and Personality

Shiki is the lead vocalist of his high school's music club that later forms into a five-men idol band. He is a very energetic boy who loves to sing and loves his high school buddies, so rather than going their separate ways after graduation, Shiki intends to mastermind their debut as an idol unit. He also tends to add "honkii" or "mega" to any descriptor he uses, and ends all of his sentences with す(ssu). He refers the Producer as "Producer-chan" and his buddies by their given name in katakana plus "cchi", though he also refers Hayato Akiyama as "Hayato Senpai". He's not the best at academics, so he studies with his buddies a few days before exams.

In the anime, it's revealed that Shiki thinks that he isn't good at anything except singing, and in middle school, he would spend all of his free time at karaoke. However upon meeting HighxJoker at his first year entrance ceremony in high school, and seeing them perform, he became inspired to do something with his youth and begged Hayato to let him join the band.

While initially he comes off as an airhead who's unable to read the mood, he simply gets too excited sometimes, but is always willing to make up for anything he messes up, saying that 'men speak with results'. He is aware of how he may come off, and is grateful to the Producer for supporting him despite this.

Shiki is a fan of spicy food and candy, and is always seen with mascot character Kumacchi, either on his clothes, phone, or as a plush.

Game Discography

Shiki is a Physical type idol, and his basic card starts at Rare. He has 9 SR card sets, including "Midsummer Escape", "Snow Season","Splendidly Handsome", "ST@RTING LINE", "Swimsuit Appeal", "Day Off", "1st STAGE", "Hyper Positive", and "Best Stage". He and Natsuki Sakaki are the second group of HighXJoker members to receive the SR card set for the Election vote by winning the top two spots.

Basic Quotes

Self Introduction: "‘Sup! I’m the future new star of the idol world, Shiki Iseya! Remember that, okay? My dream is to become the biggest idol anyone’s ever seen! I’ll be counting on you, dude! Seriously!"

Scout: (1) "‘Sup! I’m Shiki Iseya, Producer-chan! It might be a long term relationship from here on out, but all the same, it’s mega nice to meet you!"

(2) "What else are ya gonna do with your free time other than karaoke? I’m super good at getting high scores, you know! Wanna see? I’ll show ya next time!"

Change!: "Wow! This new me is so rad! I gotta work hard so I’m just as cool as this outfit!"

Login: (1) "I wanna sing once in awhile too, Producer-chan! Being an answering machine all the time’s gonna make me hyper-depressed..."

(2) "You’re late, Producer-chan! I’m getting sick of waiting for you all the time! ...Just kidding!~ Where should we start t’day? Anything’s good with me!"

Lesson: "OKAY! Leave the voice lessons to me! I’ll show ya how it’s done!"

My Desk (Reliability 0%): "‘Sup, Producer-Chan! So? Don’tcha think I look mega-cool today, too?"

My Desk (Reliability 5%): "If I don’t work harder... No, it’s fine. They’ll notice me eventually."

My Desk (Reliability 30%): "Cats are the absolute coolest... Hah... I want one sooooo badly."

My Desk (Reliability MAX): "I can handle any song you throw at me now, Producer-chan! Lemme show ya!"

Work (Reliability 0%): "OKAY, feelin’ good! Let’s pump it up! Go, go, let’s go!"

Work: "Long as I’m in the zone, anything ya throw at me’s gonna be an easy win♪ No matter what!"

Work (Reliability MAX): "Producer-chan! How was I up there? Didn’t I look SUPER cool?!"

Reliability UP: (1) "Well... I’m definitely gaudy... maybe... But that doesn’t mean I’m singing half-heartedly! I wonder how I can convey that to everyone..."

(2) "I tried thinking about a bunch of different things, but if I have time to worry, I have time to crack down on singing practice. Men speak with results, after all!"
(3) "As long as you're watching me, Producer-chan, I can believe in myself. I'm gonna blow everyone outta the water, just you see!"

Reliability MAX: "Producer-chan is just like a cat to me... In other words, someday, I’m gonna be worth your time. I mean it."

Audition Battle Prep: "Hey, are you ready too? C’mon, get amped up! Let’s get in there!"

Audition Battle: (1) "Alright, let’s do it!"

(2) "YAY! I’ll show you just how fierce I can be!"
(3) "Mega-serious-mode, activate!"

Live Prep: "YAY! Get hype, get hype!!"

Live Continuation: (1) "We can keep going, can’t we? Come on, come on, stay happy! Get hype!"

(2) "Umm... I guess it wasn't enough? ...But I'm already mega MAXed out!"

Live Success: (1) "Producer-chan, didja see that?! That felt GREAT! I totally rocked it out there!"

(2) "Everyone was AWESOME out there! What can I say? It’s a cinch once I walk in!"
(3) "YAY! If they’re gettin’ THAT amped up over just this, then singing must be the funnest thing EVER!"

Song Discography

Image songs

Saikoo COUNT UP!

Recorded Solo Songs

Recorded Group Songs

Trivia and Fan Culture


  • Shiki's SR card for the 2016 White Day event matches up to Ren Kizaki's. In Shiki's card, a part of Kizaki's hair can be seen on the far left.
  • In most of his card descriptions, he tends to exclaim "Yay (イェーイ)!" when he's excited.
  • Shiki's "flashy" appearance as well as his cheerful manner of speaking appear to have been heavily influenced by 'Gyaruo' style, the male counterpart to 'Gyaru', as well as 'Host' style.
  • Shiki is the second HighXJoker member to secure the first place spot in THE iDOLM@STER: SideM Election after Hayato Akiyama.
  • Initially, Shiki was not supposed to join HighXJoker.
  • There's a running trend of Shiki befriending members of other units who have trouble socially after being in events with them, like Rei Kagura and Ren Kizaki. This odd trio has become popular among fans.
  • Shiki loves pandas. In the anime, he modified his class' culture festival haunted house to be a panda horror house.
  • 'Shiki' (四季) translates to 'four seasons'. Iseya (伊瀬谷) has no defined meaning, however may be in reference to the Ise Grand Shrine, which is dedicated to the sun goddess Ameterasu.
  • When he speaks to his grandparents, he will slip back into an Aomori dialect.

Fan Culture

  • Fans often call him "Shiki-wan" (四季わん).
  • He is often paired with Shiki Ichinose in fan-works for both their shared given name and similar personality.

Character Gallery

SideM Cards