Koga Yudai (古賀 祐大; born October 21, 1997), known professionally as K (ケイ; 케이), is a Japanese singer and choreographer under HYBE Labels Japan. He is a member of the boy group &TEAM.

KNOWN FOR

Inkigayo
2026
DayDay.
2024
Honey Lemon Soda
2025
IDOL 1N2D
2026
Idol Human Theater
2023
&DAY
2022
I-LAND
2020
The Silence Of IDOL
2026
Hong Seok-cheon's Jewelry Box
2024
GRandSLAM!
2026
Blue Lock
2026
&Audition - The Howling
2022

FILMOGRAPHY

All
Movies
TV
Acting
61
Sound
1
2026
Blue Lock
as Nagi Seishiro
2026
&TEAM VR CONCERT: BOUNDLESS
2026
&TEAM VR CONCERT : BOUNDLESS
2026
2026 &TEAM CONCERT TOUR 'BLAZE THE WAY' in JAPAN
2026
Leave it to &TEAM
2026
&TEAM COURSE
2026
IDOL 1N2D
2026
After Inkigayo! UP Karaoke
2026
GRandSLAM!
2026
The Silence Of IDOL
2026
MUSIC FAIR
2026
Sore Snow Man ni Yarasete kudasai
2026
S☆1
2026
&TEAM vs FANTASTICS
2026
VOGUE QUIZ
2026
Wolf Boy Lie or Truth
2026
ZIP!
2026
Dingo Attack
2026
Hirunandesu!
2026
Mezamashi TV
2026
Sakusakuhimuhimu ☆ oshi no furu yoru ☆
2026
1 Oku-ri no Dai Shitsumon!? Warattekoraete!
2026
Inkigayo
2026
Unveil &TEAM
2026
&TEAM's Secret Vacation
2026
Celebs Play With Puppies & Kittens
2026
SUMBAKKOKJIL 2
as Self
2026
IDOL PUMP KING
2026
Evangelist
· unreleased
2025
Ya Boy Kongming! The Movie
as Self
2025
&TEAM 100 Days Journey ~Howling out to the World~
2025
IDOL DKDK CLUB
2025
MAEJEOMGAYO
2025
CDTV Live! Live!
2025
ALL!Light! &TEAM
2025
with MUSIC
2025
TOKYO023
2025
Cha Cha Cha
2024
HYBE CINEMA NORAEBANG
as Self (archive footage)
2024
&TEAM 1st SINGLE "Samidare" SPECIAL TALK
as Self
2024
Take Me
as Grim Reaper
2024
Go ONE!!! MEET & LINK
2024
Hong Seok-cheon's Jewelry Box
as Self
2024
DayDay.
2024
LOVE it!
2024
All Star Thanksgiving Festival
2024
Girls Barking Night
2024
Milky Boys
2024
&TEAM EPISODE
2024
Boiling Words 10
2024
Otodoraku Root
2024
M:ZINE
2023
Idol's Physical Race
as Self
2023
Idol Human Theater
2023
Eightest
2023
&TEAM CLUB
2023
The Breakthrough Files
2022
&Audition - The Howling
as Self - Contestant
2022
&TEAM Gakuen
2022
&DAY
2020
I-LAND
as Self - Contestant