ArtistE Entertainment
Ruone
Ruone (루원) is a Japanese vocalist and dancer in AmbiO (엠비오) under E Entertainment. Born Takehata Kai (タケハラカイ) on June 17, 2004, he competed on the Korean survival show MAKEMATE1 under the name Kai before joining E Entertainment after elimination in episode 6. Standing 182 cm with blood type B, Ruone is an INFP whose performance style combines technical precision with an emotional openness that his members say sets him apart. His role model is Taeyong of NCT, and his specialty within AmbiO is modeling poses -- a natural extension of his visual instincts. He was the third member revealed on September 22, 2025, and participated in AmbiO's run of pre-debut singles: "Runnin'" (September 27), "I Wish" (October 27), and "Click" (November 27, 2025). The group officially debuted on March 18, 2026 with the mini-album Boys Be Ambitious, capping months of stage-building in Japan. Fluent in Korean and Japanese, Ruone is one of two non-Korean members in AmbiO alongside Taiwanese leader Tetsu. His nickname Kai-kun follows him from the MAKEMATE1 era.
1 articles4 creditsDebut: March 18, 2026Japanese
Gallery
Discography
2026
Boys Be AmbitiousMini Album
2025
Runnin'Single
2025
I WishSingle
2025
ClickSingle
Fans Also Ask
Who is Ruone in AmbiO?
Ruone (루원), born Takehata Kai, is the Japanese vocalist and dancer of AmbiO, a five-member multinational K-pop boy group under E Entertainment. He competed on the survival show MAKEMATE1 under the name Kai before joining AmbiO and debuting on March 18, 2026.
What survival show was Ruone on?
Ruone competed on MAKEMATE1, a Korean idol survival show, under the stage name Kai. He was eliminated in episode 6 before joining E Entertainment and debuting as a member of AmbiO on March 18, 2026 with the mini-album Boys Be Ambitious.
What nationality is Ruone from AmbiO?
Ruone is Japanese. Born Takehata Kai on June 17, 2004, he is one of two non-Korean members in AmbiO alongside Taiwanese leader Tetsu. He is fluent in both Japanese and Korean.
What is Ruone's MBTI?
Ruone's MBTI type is INFP. He is known for bringing emotional depth to AmbiO's performances. His role model is Taeyong of NCT, and his specialty within the group is modeling poses. His nickname Kai-kun traces back to his MAKEMATE1 era.
What is Ruone's height?
Ruone is 182 cm tall (approximately 6 feet). He is the third member of AmbiO by reveal order and one of the group's main vocalists and dancers under E Entertainment.
