K
- Known For
- Acting
- Born
- October 21, 1997 in Kashiwa, Chiba, Japan
- Active Years
- 1964–2026 (63 Years)
- Total Credits
- 60 credits in database
Biography
Subject: K (Acting).
Source Material: TMDB Bio and TMDB Profile.
Constraints:
Only verifiable facts from the provided text.
No invented details (titles, names, dates, etc.).
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 90-130 words.
No preamble, no JSON, no surrounding quotes.
Name: Koga Yudai (古賀 祐大).
Stage Name: K (ケイ; 케이).
Birth Date: October 21, 1997.
Age: 28 years old (per source).
Place of Birth: Kashiwa, Chiba, Japan.
Profession: Japanese singer, choreographer, and actor (known for acting).
Affiliation: HYBE Labels Japan.
Group: Member of the boy group &TEAM.
Known Credits: 60.
Koga Yudai, born October 21, 1997, in Kashiwa, Chiba, Japan, is a Japanese singer and choreographer who performs under the professional stage name K. He is a member of the boy group &TEAM and is signed under HYBE Labels Japan. In addition to his musical career, he is known for acting and has 60 known credits. He is also referred to by his name in various scripts, including Koga Yudai, K, and 케이. As of the provided information, he is 28 years old.
Draft 1: Koga Yudai, born October 21, 1997, in Kashiwa, Chiba, Japan, is a Japanese singer and choreographer who performs professionally under the stage name K. He is a member of the boy group &TEAM and is associated with HYBE Labels Japan. Beyond his work as a singer and choreographer, he is known for acting and has 60 known credits. He is also recognized by the names Koga Yudai and 케이. At 28 years old, his professional identity includes roles
Career overview
Subject: K (Koga Yudai).
Goal: Write a 180-260 word career overview focusing on acting.
Constraints:
Use only verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, awards, etc.
Neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 180-260 words.
Structure: 2-3 short paragraphs.
No preamble or JSON.
Name: Koga Yudai (古賀 祐大; こが ゆうだい).
Stage Name: K (ケイ; 케이).
Birth Date: October 21, 1997.
Place of Birth: Kashiwa, Chiba, Japan.
Profession: Japanese singer, choreographer, and actor.
Affiliation: HYBE Labels Japan.
Group: Member of the boy group &TEAM.
Known Credits: 60.
Known For: Acting.
Drafting Paragraph 1: Identity and Background
Koga Yudai, known professionally by the stage name K, is a Japanese singer, choreographer, and actor. Born on October 21, 1997, in Kashiwa, Chiba, Japan, he is a member of the boy group &TEAM. He operates under the management of HYBE Labels Japan.
Drafting Paragraph 2: Career/Acting Focus
In his professional career, K is recognized for his work in acting. According to records, he has a total of 60 known credits. While his background includes roles as a singer and choreographer, his professional profile highlights acting as a primary area of recognition.
Checking Word Count:
Current draft: ~85 words.
Target: 180-260 words.
Problem: The source material is extremely sparse. I cannot invent details to reach the word count. I must stick to the facts. If I can't reach 180 words without inventing things, I have a conflict between "Use ONLY facts" and "Write a 180-260 word career overview".
Re-evaluating the Source:
Name: Koga Yudai (古賀 祐大; こが ゆうだい; 케이)
Stage Name: K (ケイ; 케이)
Birth: Oct 21, 1997, Kashiwa, Chiba, Japan.
Roles: Singer, choreographer, actor.
Group: &TEAM.
Label: HYBE Labels Japan.
Credits: 60.
Strategy to expand without inventing:
I will use the different name variations provided and expand on the biographical details provided in the text to ensure the prose is formal and encyclopedic. However, if the facts simply do not support 180 words, I must prioritize the "Use ONLY facts" instruction over the word count instruction, as the prompt says "If a detail is not in the provided material, you omit it rather than guess."
Wait, let me try to be more descriptive with the existing facts:
Koga Yudai, who performs under the stage name K, is a Japanese professional known for his work as a singer, choreographer, and actor. He was born on October 21, 1997, in Kashiwa, Chiba, Japan. He is currently a member of the boy group &TEAM and is associated with HYBE Labels Japan.
In terms of his professional credits, K has 60 known credits to his name. His profile indicates that he is specifically known for his work in acting. His name is also recorded in various formats, including Koga Yudai, 古賀 祐大,
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Frequent co-stars
Career timeline
Full Filmography
60 titles- GRandSLAM! (2026)
- Blue Lock (2026) as Nagi Seishiro
- SUMBAKKOKJIL 2 (2026) as Self
- &TEAM COURSE (2026)
- Unveil &TEAM (2026)
- &TEAM's Secret Vacation (2026)
- &TEAM vs FANTASTICS (2026)
- Leave it to &TEAM (2026)
- 2026 &TEAM CONCERT TOUR 'BLAZE THE WAY' in JAPAN (2026)
- After Inkigayo! UP Karaoke (2026)
- &TEAM VR CONCERT : BOUNDLESS (2026)
- &TEAM VR CONCERT: BOUNDLESS (2026)
- IDOL PUMP KING (2026)
- Honey Lemon Soda (2025) Theme Song Performance
- MAEJEOMGAYO (2025)
- Ya Boy Kongming! The Movie (2025) as Self
- &TEAM 100 Days Journey ~Howling out to the World~ (2025)
- IDOL DKDK CLUB (2025)
- ALL!Light! &TEAM (2025)
- TOKYO023 (2025)
- Sakusakuhimuhimu ☆ oshi no furu yoru ☆ (2025)
- with MUSIC (2024)
- Take Me (2024) as Grim Reaper
- Go ONE!!! MEET & LINK (2024)
- Otodoraku Root (2024)
- HYBE CINEMA NORAEBANG (2024) as Self (archive footage)
- &TEAM 1st SINGLE "Samidare" SPECIAL TALK (2024) as Self
- Milky Boys (2024)
- M:ZINE (2024)
- DayDay. (2023)
- Hong Seok-cheon's Jewelry Box (2023) as Self
- Eightest (2023)
- &TEAM EPISODE (2023)
- &TEAM CLUB (2023)
- IDOL 1N2D (2022)
- &DAY (2022)
- &Audition - The Howling (2022) as Self - Contestant
- Idol's Physical Race (2022) as Self
- &TEAM Gakuen (2022)
- Idol Human Theater (2021)
- Girls Barking Night (2021)
- LOVE it! (2021)
- I-LAND (2020) as Self - Contestant
- The Silence Of IDOL (2020)
- Sore Snow Man ni Yarasete kudasai (2020)
- CDTV Live! Live! (2020)
- VOGUE QUIZ (2020)
- Mezamashi TV (2019)
- The Breakthrough Files (2018)
- Celebs Play With Puppies & Kittens (2016)
- Dingo Attack (2016)
- Boiling Words 10 (2015)
- Hirunandesu! (2011)
- ZIP! (2011)
- S☆1 (2009)
- Wolf Boy Lie or Truth (2004)
- Inkigayo (1998)
- 1 Oku-ri no Dai Shitsumon!? Warattekoraete! (1996)
- All Star Thanksgiving Festival (1991)
- MUSIC FAIR (1964)
Frequently Asked Questions
What movies or TV shows is K best known for?
K is widely recognized for notable roles and projects including Blue Lock (2026), SUMBAKKOKJIL 2 (2026), Unveil &TEAM (2026), &TEAM vs FANTASTICS (2026).
When and where was K born?
K was born on October 21, 1997 in Kashiwa, Chiba, Japan.
How many credits does K have?
K has accumulated over 60 film and television credits across a career spanning from 1964 to 2026.
What is K's background in cinema and television?
Subject: K (Acting). Source Material: TMDB Bio and TMDB Profile. Constraints: Only verifiable facts from the provided text. No invented details (titles, names, dates, etc.). Original, neutral, encyclopedic prose. Plain text only (no markdown, no asterisks, no headings, no bullet points). Word count: 90-130 words. No pr...
K by the numbers
Age in their best-rated roles
- Hirunandesu! (2011) — aged about 13
- SUMBAKKOKJIL 2 (2026) as Self — aged about 28
- Inkigayo (1998) — aged about 0
- 2026 &TEAM CONCERT TOUR 'BLAZE THE WAY' in JAPAN (2026) — aged about 28
- Blue Lock (2026) as Nagi Seishiro — aged about 28
- Unveil &TEAM (2026) — aged about 28
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