The Pulse of K-Entertainment

Sadaharu
ArtistSM Entertainment

Sadaharu

Sadaharu is a Japanese trainee in SM Entertainment's SMTR25 project, the public pre-debut team at the center of Mnet's Reply High School. The project has turned SM's next-boy-group pipeline into a weekly audience event, giving trainees like Sadaharu visibility long before a final debut lineup is officially announced.

Soompi's profile update for the show listed Sadaharu as born on September 14, 2007 and placed him among the trainees participating in the 15-member cast structure. That detail matters because Reply High School is not just promotional filler. It is a live test of trainee recognition, group chemistry, and fandom response inside one of K-pop's most closely watched rookie systems.

Sadaharu's current public footprint also includes the 2026 SMTR25 single We Go Up, which pushed the project beyond variety and into release-stage activity. He remains pre-debut, but his presence in this rollout makes him part of the next wave of talent SM is actively putting in front of the market.

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 Sadaharu in SMTR25?
Sadaharu is a Japanese trainee in SM Entertainment's SMTR25 project, the public pre-debut team introduced through SMTOWN stages and Mnet's Reply High School. He is one of the trainees getting early audience exposure before SM confirms how its next boy-group lineup will be finalized.
How old is Sadaharu from SMTR25?
Soompi's Reply High School profile update listed Sadaharu as born on September 14, 2007. That makes him part of the younger end of the SMTR25 class, but still old enough to sit in a competitive public trainee cycle where fan response and visibility can meaningfully shape future positioning.
What show is Sadaharu appearing in?
Sadaharu appears in Mnet's Reply High School, the reality program built around the SMTR25 trainees. The show places 15 participants into era-themed school settings and uses performances, lessons, and team dynamics to turn SM's trainee process into an audience-facing story before debut.
Has Sadaharu debuted yet?
No. Sadaharu is still in SM Entertainment's public trainee phase, which means he has visibility through stages, variety content, and music releases without being locked into a fully debuted idol-group identity yet. Reply High School and We Go Up are part of that pre-debut runway.
What is Sadaharu known for right now?
Right now, Sadaharu is known for being part of SMTR25's public rollout through Reply High School and the 2026 single We Go Up. Those projects matter because they give him real audience exposure inside one of the most watched trainee pipelines in the Korean music business.

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