By Evan Lee Salim 
The sighting, which quickly went viral across various social media platforms including X (formerly Twitter) and TikTok, allegedly shows Kassho walking arm-in-arm with a young woman. The pair were noted for wearing matching clothing, a common cultural signifier of a romantic relationship in many East Asian countries. This public appearance has led many industry observers and fans to conclude that Kassho is no longer under contract with SM Entertainment, as active trainees—particularly those slated for an imminent debut—are typically subject to stringent behavioral guidelines and privacy protocols that preclude such public displays.
The Evolution of the SM Entertainment Trainee System
To understand the significance of Kassho’s apparent departure, one must look at the historical context of SM Entertainment’s trainee development programs. For over a decade, the agency has utilized the "SM Rookies" brand to introduce potential idols to the public before their official debut. This strategy has been instrumental in building pre-debut fanbases for members of global powerhouse groups such as NCT, aespa, and RIIZE.
In 2023 and 2024, SM Entertainment began transitioning its trainee management style under the "SM 3.0" initiative. This new era aims to streamline the debut process and increase transparency. The latest cohort of trainees, dubbed SMTR25, represents the core of the agency’s next major boy group. Unlike previous iterations of SM Rookies, these trainees have been promoted through more modern digital content, including the variety series Reply High School, which allowed fans to witness their personalities and chemistry in a semi-scripted setting.
Kassho first gained significant international attention through his participation in NCT Universe: LASTART, a survival program designed to select the members of NCT WISH, the final sub-unit of the NCT brand. While Kassho did not make the final lineup for NCT WISH, his talent and visual appeal made him a standout candidate for SM’s next non-NCT boy group. His inclusion in subsequent promotional materials for SMTR25 solidified his status as a "sure-fire" member of the upcoming group, making the recent news of his sighting in Japan all the more shocking to the fandom.
Details of the Alleged Sighting in Japan
The reports began to surface on September 10, 2026, when a netizen shared a brief video and several photographs of an individual identified as Kassho. The sighting took place in a busy urban area in Japan. According to witnesses, the individual appeared relaxed and unconcerned with being recognized, a stark contrast to the guarded nature of K-pop trainees in Seoul.
The most discussed aspect of the sighting was the presence of a woman, described by netizens as his alleged girlfriend. The two were seen walking closely together, with the woman holding his arm. They were reportedly wearing coordinated outfits, which in the context of "couple culture," often indicates a public acknowledgment of a relationship. Given that SM Entertainment, like many major agencies, often maintains a "no-dating" policy for its trainees to ensure total focus on their upcoming careers, this sighting serves as a strong indicator that Kassho has likely moved on from the agency.
Furthermore, the timing of the sighting coincides with a period of relative silence regarding Kassho’s activities in Korea. While other members of the SMTR25 project have been seen entering and exiting the SM Entertainment headquarters in Cheongdam-dong, Kassho had been notably absent from recent unofficial "fan-sightings" near the building.
Analysis of Fan Reactions and Social Media Discourse
The reaction from the K-pop community has been a mixture of disappointment, surprise, and supportive resignation. On platforms like X, fans who had followed Kassho since his LASTART days expressed sadness that they would not see him debut under the SM banner. However, a significant portion of the discourse has been remarkably positive, with many fans wishing him happiness in his personal life.
One viral post stated, "Watching you grow over these past three years has been such a joy. Thank you Kassho for all your hard work. I respect your decision and will always support whichever path you choose." This sentiment reflects a growing trend in K-pop fandom where "solo stans" prioritize the well-being and personal freedom of their favorite trainees over the traditional, often restrictive, idol path.
In addition to supportive messages, rumors have also circulated regarding the nature of his departure. Some netizens claimed that the trainee might be preparing for marriage, though these reports remain entirely unverified and are largely viewed as speculative. Regardless of the veracity of marriage rumors, the consensus remains that Kassho has chosen a path that leads away from the idol industry, at least for the time being.
Implications for SM Entertainment’s New Boy Group
The apparent loss of a high-profile trainee like Kassho presents both a challenge and a strategic pivot for SM Entertainment. The upcoming boy group is a critical component of the company’s 2025-2026 financial roadmap. Following the massive success of RIIZE, expectations for the next group are at an all-time high.
- Lineup Stability: The departure of a trainee who has already been introduced to the public can sometimes cause "rookie fatigue" among fans who become attached to specific lineups. SM Entertainment will need to ensure that the remaining members of SMTR25 maintain a strong presence to mitigate any sense of instability.
- Brand Identity: Kassho brought a specific "vibe" to the group that resonated with Japanese fans. His departure may require the agency to re-evaluate their promotional strategies in the Japanese market or perhaps introduce a new trainee to fill that specific niche.
- The "SM 3.0" Transparency: Under the new management structure, SM Entertainment has been more communicative about its plans. Industry analysts suggest that the agency may soon release an official statement regarding the finalized lineup of the new group to quell rumors and refocus public attention on the remaining trainees.
The Broader Context of Trainee Departures
Kassho is not the first high-profile SM trainee to leave the company just before a projected debut. History is replete with "hidden" or "rookie" trainees who opted for different lives. Famous examples include Lami and Koeun, who were prominent members of the female SM Rookies but left the agency before the formation of aespa.
These departures often highlight the immense pressure of the K-pop training system. Trainees often spend 12 to 15 hours a day practicing dance, vocals, and language skills, often with no guarantee of a debut. For international trainees, the isolation of living in a foreign country adds another layer of difficulty. If Kassho has indeed returned to Japan to pursue a relationship and a standard lifestyle, it underscores the personal sacrifices required to succeed in the Korean music industry.
Chronology of Kassho’s Career Path
- Early 2023: Kassho is identified as an SM Entertainment trainee and enters the selection process for the final NCT unit.
- July 2023: NCT Universe: LASTART premieres. Kassho gains a following for his performance skills and stage presence.
- September 2023: The final lineup for NCT WISH is announced. Kassho is not included but remains a trainee under SM Entertainment.
- Late 2023 – Mid 2024: Kassho is integrated into the SMTR25 project. He appears in various promotional contents and variety segments like Reply High School.
- August 2026: Fans notice a decrease in Kassho’s appearances in trainee-related content.
- September 10, 2026: Photos and videos of Kassho in Japan with an alleged girlfriend surface online, signaling his likely departure from the agency.
Conclusion and Future Outlook
As of this writing, SM Entertainment has not issued a formal statement regarding Kassho’s status. This is standard practice for the agency, which rarely comments on the status of trainees who have not yet made their official debut. However, the visual evidence provided by the recent sightings suggests that the SMTR25 project will proceed with a revised lineup.
For Kassho, the future appears to be one of his own making, away from the flashbulbs and rigorous schedules of the Seoul idol scene. For SM Entertainment, the focus remains on the successful launch of their next boy group, a project that carries the weight of maintaining the agency’s legacy in a rapidly evolving global market. The "Kassho incident" serves as a poignant reminder of the human element behind the idol manufacturing process—where the dream of stardom sometimes gives way to the pursuit of a private, conventional life.
The K-pop industry will continue to watch the SMTR25 project closely, as the remaining trainees prepare for what is expected to be one of the most significant debuts of the coming year. Whether through a formal announcement or the eventual reveal of a debut teaser, the final chapter of this trainee group’s pre-debut story is nearing its conclusion.
