The Pulse of K-Entertainment

Kassho
ArtistSM Entertainment

Kassho

Kassho is one of the Japanese trainees in SMTR25, the public rookie rollout that SM Entertainment pushed into the mainstream through Reply High School and the 2026 single We Go Up. Instead of waiting for a final debut lineup, SM gave trainees like Kassho a real audience-facing runway, complete with broadcast exposure, live stages, and an official release tied to the project.

The profile package released for Reply High School lists Kassho as born on January 20, 2006 and identifies him as Japanese. That fits the larger SMTR25 structure, which was introduced as a multinational trainee class built to test chemistry, visibility, and fan response before the company settles on a final debut path.

Kassho's page is still early-stage by design, but the setup matters. He already sits inside a branded pre-debut ecosystem with music, weekly storytelling, and a recognizable official social footprint. If SMTR25 turns this visibility into a formal debut, Kassho will not be starting from zero. He already has a documented lane, public recognition, and a credible first chapter in motion.

SMTR25
Member of SMTR25
0 articles2 creditsJapanese

Gallery

Discography

2026
We Go UpSingle
SMTR25 MemberSMTR25SM Entertainment

Filmography

2026
Reply High SchoolVariety Show
Cast MemberMnet

Fans Also Ask

Who is Kassho in SMTR25?
Kassho is one of the trainees introduced through SM Entertainment's SMTR25 rollout. He appears on Mnet's 2026 reality show Reply High School, which gave 15 trainees an audience-facing pre-debut platform through classes, missions, and ongoing performance content tied to SM's next rookie-team pipeline.
How old is Kassho from SMTR25?
Kassho was born on January 20, 2006, based on the profile details released for Reply High School. That puts him in the older half of the SMTR25 class and part of the group of trainees already receiving official exposure through broadcast content and the 2026 single We Go Up.
What nationality is Kassho?
Kassho is Japanese. SMTR25 was introduced as a multinational trainee project, and his Japanese background reflects SM Entertainment's wider cross-market strategy as it develops a new boy-group pipeline with built-in international reach.
Has Kassho debuted yet?
No. Kassho is still active in the public trainee phase through SMTR25 rather than a confirmed final debut lineup. Reply High School and We Go Up gave him official activity and public credits, but SM Entertainment has not yet announced the final structure of the rookie team.
What is Kassho known for right now?
Kassho is currently known for appearing in Reply High School and for being part of the SMTR25 lineup behind the 2026 single We Go Up. Those projects gave him early visibility through both weekly broadcast storytelling and official music content before a formal debut announcement arrives.

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