20SI. Members Profile

20SI. Members Profile and Facts

20SI. is a 7-member Japanese boy group. The members are Itsuki, Souichiro, Yuhi, Ibuki, Yuto, Hidenobu, and Atsuya. They held their debut live on September 4, 2025, before releasing their first single “PINPONPAN” on September 20, 2025.

Group Name Meaning: N/A
Official Greeting: “Hello, we are 20SI.!”

20SI. Official Fandom Name: N/A
Official Fandom Name Meaning: N/A
20SI. Official Color: N/A

20SI. Official Logo:

Official SNS:
Instagram: @20si._official
X: @20si_ukatama
YouTube: にじゅっさい

20SI. Member Profiles:
Itsuki

Stage Name: Itsuki (いつき)
Birth Name: Miyatake Itsuki (宮武 樹)
Position(s): N/A
Birthday: June 30, 2001
Zodiac Sign: Cancer
Chinese Zodiac Sign: Snake
Height: 170 cm (5’6″)
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Japanese
Representative Color: Purple
Representative Emoji: 💜
Instagram: @m.itsuki0630
Threads: @m.itsuki0630
X: @Itsuki_20SI
TikTok: @itsuki4766

Itsuki Facts:
– Itsuki was born in Hyogo, Japan.
– His nickname is Ikkun.
– He was officially introduced as a member on September 5, 2025.
– Itsuki is a fan of K-pop.
– His role models are ENHYPEN.
– He admires Ni-Ki of ENHYPEN.
– Itsuki is a model for Men’s egg.
– He can speak Japanese and a bit of Korean.
– Itsuki is under A-Light.
– Specialties: Gymnastics and dancing.
– Hobbies: Watching anime, fashion, and music appreciation.

Souichiro

Stage Name: Souichiro (そういちろう)
Birth Name: Wakui Souichiro (涌井蒼一郎)
Position(s): N/A
Birthday: October 22, 2003
Zodiac Sign: Libra
Chinese Zodiac Sign: Goat
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Japanese
Representative Color: Blue
Representative Emoji: 💙
Instagram: @souichiro_20si
X: @souichiro_20si
TikTok: @souichiro_20si

Souichiro Facts:
– His nickname is So-chan.
– He was officially introduced as a member on August 31, 2025.
– He wants to become a model.
– Souichiro hopes to fulfill his other dreams.
– He used to do track-and-field.

Yuhi

Stage Name: Yuhi (ゆうひ)
Birth Name: Tsuji Yuhi (辻 雄飛)
Position(s): N/A
Birthday: March 25, 2004
Zodiac Sign: Aries
Chinese Zodiac Sign: Monkey
Height: 175 cm (5’9″)
Weight: N/A
Blood Type: N/A
MBTI Type: ENTJ-A
Nationality: Japanese
Representative Color: Red
Representative Emoji: ❤️
Instagram: @yuhi_20si
Threads: @yuhi_20si
X: @yuhi_20si
TikTok: @yuhi_20si

Yuhi Facts:
– Yuhi was born in Tokyo, Japan.
– Education: Komazawa University (Department of Economics/ Commerce).
– In 2026, Yuhi graduated from Komazawa University where he obtained a degree in Commerce.
– Yuhi was officially introduced as a member on August 30, 2025.
– He has a serious side as well as a playful side.
– He was the runner-up for Komazawa MAS Contest 2023.
– Yuhi wants to paint the stage red with his passion and his smile.
– In his own words, Yuhi is cute and cool, and sometimes funny.
– When a person meets Yuhi, they can feel warm and fuzzy.
– He has an interest in makeup.
– Yuhi likes K-pop.
– He likes to watch Disney movies.
– He likes to wear accessories.
– Yuhi is also a model.
– He enjoys snowboarding.
– His specialty is krumping. He has done many dance battles with other dancers.
– Yuhi can do hat-tricks.
– He is a big fan of POP VILLAINS, he has been a fan of theirs since high school.
– A drink he recommends is a matcha soy latte.
– Yuhi wants to become an actor.
– His idol dancer is TAICHI of Tiny Twiggz.
– He dressed up as Flynn Rider from Tangled for Halloween in 2025.
– His goal at the start of his career as a member was to perform in large venues in front of many people.

Ibuki

Stage Name: Ibuki (いぶき)
Birth Name: Abe Ibuki (安部生吹)
Position(s): N/A
Birthday: June 11, 2004
Zodiac Sign: Gemini
Chinese Zodiac Sign: Monkey
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Japanese
Representative Color: Yellow
Representative Emoji: 💛
Instagram: @ibuki0611
X: @Ibuki_20SI
TikTok: @ib_0611

Ibuki Facts:
– Ibuki was officially introduced as a member on August 29, 2025.
– He has cats.
– He has an interest in fashion.
– Ibuki is a cat-person.

Yuto

Stage Name: Yuto (ゆうと)
Birth Name: Yamada Yuto (山田悠翔)
Position(s): N/A
Birthday: October 30, 2004
Zodiac Sign: Scorpio
Chinese Zodiac Sign: Monkey
Height: N/A
Weight: N/A
Blood Type: B
MBTI Type: N/A
Nationality: Japanese
Representative Color: Green
Representative Emoji: 💚
Instagram: @yuto_20si
Threads: @yuto_20si
X: @Yuto_20SI
TikTok: @yuto_20si

Yuto Facts:
– He was officially introduced as a member on September 2, 2025.
– Yuto has a laid-back personality.
– His specialty is sleeping.
– Yuto likes winter because he can wear hats.
– He wants to grow both as an idol and as an individual.
– He is close to A’z LAND‘s Shoyo.
– For Halloween 2025, he dressed up as Aladdin.
– When dressing up in costumes, he is reminded of school festivals which makes him feel young again.

Hidenobu

Stage Name: Hidenobu (ひでのぶ)
Birth Name: Miyoshi Hidenobu (三好秀信)
Position(s): N/A
Birthday: March 5, 2005
Zodiac Sign: Pisces
Chinese Zodiac Sign: Rooster
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: INFP
Nationality: Japanese
Representative Color: White
Representative Emoji: 🤍
Instagram: @hidenobu_20si
X: @Hidenobu_20SI
TikTok: @hidenobu_20si

Hidenobu Facts:
– He was officially introduced as a member on September 1, 2025.
– Hidenobu has a dog.
– He is friends with AYUMU.

Atsuya

Stage Name: Atsuya (あつや)
Birth Name: Okada Atsuya (岡田 篤哉)
Position(s): Youngest
Birthday: July 7, 2006
Zodiac Sign: Cancer
Chinese Zodiac Sign: Dog
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Japanese
Representative Color: Orange
Representative Emoji: 🧡
Instagram: @atsuya_20si
X: @Atsuya_20SI / @achu_subdayo
TikTok: @atsuya_20si

Atsuya Facts:
– Atsuya was born in Osaka, Japan.
– He has an older brother and an older sister.
– His nickname is Acchan.
– Atsuya was part of a band in school.
– He was officially introduced as a member on September 3, 2025.
– His specialty is drawing.
– Atsuya’s favorite season is hoodie season.
– He has an iPhone 14 Pro.
– He is a fan of Disney and has seen Zootopia at least four times.
– For Halloween 2025, Atsuya dressed up as Peter Pan.
– He is close to RYUKI of Chrono★Genesis.

Note 1: Please don’t copy-paste the content of this page to other sites/places on the web. Please do respect the time and effort the author put in compiling this profile. If you need/want to use info from our profile, please kindly put a link to this post. Thanks a lot! 🙂 – KProfiles.com

Note 2: Source for MBTI types: Yuhi confirmed it in his Instagram bio. Hidenobu confirmed it on X.

For reference on MBTI types:
E = Extroverted, I = Introverted
N = Intuitive, S = Observant
T = Thinking, F = Feeling
P = Perceiving, J = Judging

Note 3: Source for Representative Colors.

Made by: LIKEYLIKEY_

Latest Official Release:

Who is your 20SI. bias? Do you know more facts about them? Feel free to comment below. 🙂