The television landscape in South Korea has seen a significant shift in audience engagement metrics as the tvN drama Four Hands, Two Sonatas concluded its highly successful run. The series, which captivated viewers with its intricate narrative and high-production value, reached a peak viewership rating of 9.4%, securing its position as one of the most talked-about programs of the current quarter. Following the conclusion of the series, the lead actors, Song Kang and Lee Jun Young, have dominated the industry’s brand reputation rankings, underscoring the profound impact of the project on their respective careers.
According to the latest data released by the Korea Corporate Reputation Research Institute on October 13, 2026, the performance of actors in dramas airing between September 13 and October 13 has been analyzed through a comprehensive brand big data index. This index, which aggregates participation, media coverage, communication, and community engagement, provides a quantified view of an actor’s current influence within the public sphere.
Analyzing the October Brand Reputation Rankings
The Korea Corporate Reputation Research Institute, led by Director Koo Chang Hwan, processed a total of 62,934,772 data points for this month’s analysis. This represents a notable 13.23% increase in total volume compared to the 55,580,237 data points recorded in the previous month, suggesting a heightened level of public interest in current television content and the actors associated with it.
Song Kang secured the top position with a brand reputation index of 4,017,408. His breakdown includes a participation index of 574,774, a media index of 595,089, a communication index of 2,206,006, and a community index of 641,538. Lee Jun Young followed closely in second place with a total index of 3,799,264, comprised of a participation index of 576,319, a media index of 60,062, a communication index of 2,031,910, and a community index of 594,060.
Rounding out the top five, Ji Chang Wook claimed third place with a score of 3,136,255, while Seo Kang Joon secured fourth place at 3,109,962, and veteran actress Gong Hyo Jin rounded out the top five with a brand reputation index of 2,849,138. The inclusion of such prominent figures in the top five reflects the competitive nature of the current K-Drama market and the sustained audience interest in high-caliber acting talent.

The Dynamics of Performance and Audience Reception
The methodology employed by the Korea Corporate Reputation Research Institute utilizes link analysis to understand the sentiment and keywords associated with top-ranking individuals. For Song Kang, the data revealed strong associations with descriptors such as "immersive," "transformation," and "soft." These keywords highlight a critical shift in public perception, suggesting that audiences have responded positively to his character’s emotional depth and his versatility as a performer.
In the keyword analysis phase, the terms most frequently associated with Song Kang were "Four Hands," "Kang Pio," and "Lee Jun Young." The strong co-occurrence of these terms indicates that the chemistry between the two leads was a primary driver of the discourse surrounding the show. The narrative weight of Four Hands, Two Sonatas clearly relied on the dynamic interaction between these two performers, which resonated effectively with both domestic and international demographics.
Chronology of the Drama’s Impact
The success of Four Hands, Two Sonatas was not an overnight occurrence but rather the result of a sustained promotional and broadcast strategy. Following the series’ premiere, the show maintained a consistent upward trend in ratings. By the midpoint of the series, social media engagement across platforms such as X (formerly Twitter) and various community forums spiked, as viewers debated plot points and character motivations.
The production period for the series involved intensive location filming and a rigorous post-production schedule that ensured the quality of the sound and visual presentation, which were noted as standout elements by industry critics. By the time the finale aired in early October, the anticipation was at an all-time high, contributing to the peak 9.4% viewership figure. The subsequent ranking by the Korea Corporate Reputation Research Institute serves as a post-script to this success, validating the actors’ efforts in the public eye.
Contextualizing Career Trajectories
The current success of these actors occurs against the backdrop of their diverse career paths. Song Kang, who has built a significant filmography over the past several years, has strategically utilized his recent success to engage directly with his fanbase. He recently announced an upcoming fan meeting titled Play, Song Kang, scheduled for December 5 in Seoul. Such events are pivotal in maintaining the momentum generated by a hit drama, allowing actors to transition from fictional roles to personal brand engagement.
Conversely, Lee Jun Young’s second-place ranking is particularly notable given his current status. He is currently fulfilling his mandatory military service, a period that typically results in a decrease in media exposure for most Korean celebrities. However, the sustained high ranking suggests that his performance in Four Hands, Two Sonatas left a lasting impression on the viewing public, keeping his brand index elevated despite his physical absence from the entertainment circuit. This indicates a high level of brand loyalty among his audience base, who have continued to interact with his content and monitor his professional milestones despite the hiatus.

Industry Implications and Future Trends
The findings from the October report provide several insights into the current state of the Korean entertainment industry. First, the 13.23% growth in brand big data suggests that the television market remains a dominant force in South Korea’s cultural economy. As platforms continue to fragment, the ability of a specific drama to aggregate such a massive volume of data—spanning multiple digital ecosystems—is a testament to the enduring power of long-form, high-budget series.
Second, the data highlights the importance of the actor-audience relationship. Modern fame in the K-Drama sphere is no longer solely dependent on viewership ratings; it is heavily reliant on the "communication index," which measures how effectively an actor or their agency manages their digital presence and how the public engages with that content. Actors who can balance high-quality performance with consistent, relatable public engagement—as seen in the case of Song Kang—are likely to maintain their competitive advantage in the long term.
Finally, the success of Four Hands, Two Sonatas serves as a benchmark for future productions on the tvN network. The collaborative nature of the project and the strategic casting of actors with complementary brand profiles have proven to be a successful formula for both ratings and brand reputation. As the industry moves forward, networks are likely to prioritize similar cross-platform, high-engagement strategies to capture the attention of an increasingly selective and vocal viewership.
Conclusion
The October 2026 actor brand reputation rankings confirm that the success of Four Hands, Two Sonatas has had a tangible, measurable effect on the industry standing of Song Kang and Lee Jun Young. Through a combination of strong viewership, positive critical reception, and high public interest, both actors have cemented their roles as leading figures in contemporary Korean drama. As the industry continues to evolve, the performance of these actors and the analytical data provided by the Korea Corporate Reputation Research Institute will continue to serve as essential metrics for understanding the shifting landscape of popular culture in South Korea. With Song Kang preparing for his upcoming fan meeting and Lee Jun Young maintaining his presence through his established body of work, both actors appear well-positioned to continue their influence in the months ahead.






