ArtistE Entertainment
Tetsu
Tetsu (테츠) is the Taiwanese leader and main rapper of AmbiO (엠비오), the five-member multinational boy group under E Entertainment. Born Guo Wun Jhe in Taipei, Taiwan on January 28, 2003, he carries the group’s heartbeat with a precise delivery and commanding stage presence that belies his relative inexperience as a debuting idol.
First revealed as AmbiO’s leader on September 20, 2025, Tetsu helped introduce a group built around a genuinely multinational identity: Taiwanese, Japanese, Korean-Canadian, and Korean members united under a single training system. The group spent months honing their craft through live performances in Japan before setting foot in a debut showcase.
AmbiO released three pre-debut singles ahead of their official launch: Runnin’ (September 27, 2025), I Wish (October 27, 2025), and Click (November 27, 2025). On March 18, 2026, the group debuted with their first mini-album Boys Be Ambitious, anchored by lead single SHOWTIME. Tetsu’s nickname Kangaroo, bestowed by fellow member Ruone for his muscular physique, has already caught on with fans online.
1 articles4 creditsDebut: March 18, 2026Taiwanese
Gallery
Discography
2026
Boys Be AmbitiousMini Album
2025
ClickSingle
2025
I WishSingle
2025
Runnin'Single
Fans Also Ask
Who is Tetsu in AmbiO?
Tetsu (테츠) is the leader and main rapper of AmbiO, a five-member multinational K-pop boy group under E Entertainment. Born Guo Wun Jhe in Taipei, Taiwan on January 28, 2003, he was the first member to be revealed ahead of the group's March 2026 debut.
What nationality is Tetsu from AmbiO?
Tetsu is Taiwanese. He was born in Taipei, Taiwan on January 28, 2003 and serves as the leader of AmbiO, the five-member multinational boy group that debuted in March 2026 under E Entertainment.
When did Tetsu debut?
Tetsu officially debuted on March 18, 2026 with AmbiO's first mini-album Boys Be Ambitious. The group had previously released three pre-debut singles: Runnin' (September 2025), I Wish (October 2025), and Click (November 2025).
What is Tetsu's nickname in AmbiO?
Tetsu's nickname is Kangaroo, given to him by fellow member Ruone because of his muscular body. He was the first member of AmbiO to be introduced to the public, revealed on September 20, 2025.
What label is AmbiO's Tetsu under?
Tetsu is signed to E Entertainment, the South Korean label that manages all five members of AmbiO. The group debuted under E Entertainment on March 18, 2026 with the mini-album Boys Be Ambitious.
