Park Jong-seong was born on April 20, 2002, in Seattle, Washington, where he grew up surrounded by the Pacific Northwest's diverse music scene. He was a Korean-American kid who loved music, particularly influenced by American R&B and pop artists. But at age 15, in 2017, Jay made a decision that would change his life forever: he left his home, his friends, and the comfort of his American upbringing to move to South Korea alone to pursue a career in K-pop.1

The transition was not easy. Beyond the obvious language barrier, Jay had to adapt to an entirely different culture, education system, and entertainment industry training regimen. In interviews, he has spoken about the loneliness and culture shock of those early days. "I had to learn everything from scratch—the language, the culture, even how to train properly," he reflected. Yet this challenge became his fuel. Jay threw himself into training, determined to prove that his sacrifice would not be in vain.1

By the time I-LAND came around in 2020, Jay had been training for nearly three years. He had transformed from a Seattle teenager with a dream into a skilled vocalist and dancer fluent in both Korean and the demanding culture of K-pop training. His bicultural background—American confidence combined with Korean work ethic—would become one of his greatest strengths.2

When I-LAND premiered on June 26, 2020, Jay started in Ground—the lower tier where eliminated trainees were sent. It was a brutal beginning. But Jay's resilience, honed through years of adapting to a foreign country, kicked in immediately. He worked tirelessly, focusing on vocal stability and stage presence. His breakthrough came during the "DNA" performance, where his powerful vocals and charismatic delivery caught the attention of both producers and viewers.3

Jay made it into I-LAND, proving he belonged among the top tier. But the journey was far from smooth—he experienced the pain of being sent back to Ground before fighting his way back up again. Each setback only strengthened his resolve. Producers noticed his leadership qualities and maturity, often stepping up to guide younger trainees. Jungwon, Sunoo, and other members have recalled how Jay would quietly help them with vocal techniques and emotional support during their most difficult moments.3

On September 18, 2020, the finale arrived. Jay earned second place with 1,179,633 votes—the second-highest vote count of all finalists. The boy who had left Seattle three years earlier had secured his debut. He would join Heeseung, Jake, Sunghoon, Jungwon, Sunoo, and Ni-ki in what would become ENHYPEN.4

From the very beginning of ENHYPEN's debut, Jay assumed an unofficial but vital role: the group's caretaker. In reality shows and behind-the-scenes content, fans constantly saw Jay cooking for the members, making sure everyone ate properly, checking on their wellbeing, and quietly solving problems before they escalated. "Jay hyung always takes care of us," Sunoo said in a Weverse interview. "Even when he's tired, he'll make sure we've eaten."5

His cooking skills became legendary among ENGENEs. Jay could prepare everything from traditional Korean dishes like kimchi jjigae to Western comfort food like pasta and steak. During ENHYPEN&HI, the group's reality show, Jay was frequently shown in the kitchen, sleeves rolled up, preparing meals while other members relaxed or practiced. When asked why he did it, Jay simply replied, "I like seeing them happy and well-fed. It's how I show I care."5

But Jay's caretaking extended beyond food. Members have described how Jay would mediate conflicts, offer advice, and create a sense of stability within the group. Heeseung once said, "Jay has this calm presence. When things get chaotic, he's the one who grounds us." Despite being younger than Heeseung, Jay's maturity—forged through the experience of living independently in a foreign country from age 15—made him a pillar of emotional support for ENHYPEN.6

Jay's fashion sense was evident from the beginning, but it truly blossomed after debut. He gravitated toward clean, sophisticated, minimalist aesthetics—tailored coats, monochromatic palettes, luxury accessories worn with effortless confidence. Fashion publications began taking notice. Vogue Korea, GQ Korea, and Harper's Bazaar featured Jay in editorials, praising his ability to blend streetwear edge with high-fashion elegance.7

In 2023, Jay was named a brand ambassador for Dior, joining an elite roster of global ambassadors for the French luxury house. He attended Dior runway shows in Paris, sitting front row alongside international celebrities and fashion icons. Creative Director Kim Jones personally praised Jay's style, noting his "natural understanding of elegance and modern masculinity." Jay's partnership with Dior cemented his status not just as an idol, but as a legitimate fashion influencer.7

Beyond Dior, Jay became associated with Cartier, wearing their iconic Love bracelets and Tank watches both on and off stage. His style influenced a generation of young fans, with his airport fashion and casual streetwear looks regularly trending on social media. Yet Jay remained humble. "Fashion is just another way to express yourself," he said in a W Korea interview. "I wear what makes me feel confident."8

As ENHYPEN's discography expanded, Jay's musical contributions became increasingly prominent. He participated in writing and composing multiple B-sides, bringing his R&B and soul influences into the group's sound. Tracks like "Polaroid Love" and "Paradise" showcased Jay's melodic sensibility and emotional depth. His vocal tone—smooth, warm, with subtle rasp—added a distinct color to ENHYPEN's harmonies.9

Jay's solo covers revealed even more of his artistic identity. His rendition of Justin Bieber's "Smile," posted to ENHYPEN's official YouTube channel, highlighted his vocal control and emotional interpretation. He performed it with guitar accompaniment, showcasing his instrumental skills. The cover quickly garnered millions of views and praise from vocal coaches who analyzed his technique. Later, his cover of "Dive" by Beach Weather demonstrated his affinity for indie-pop and alternative sounds, hinting at the solo direction he might eventually pursue.10

In live performances, Jay consistently delivered stable, powerful vocals even during intense choreography. At ENHYPEN's world tours—MANIFESTO, FATE, and WALK THE LINE—vocal directors praised his professionalism and consistency. Jay also took on challenging ad-libs and high notes in tracks like "Bite Me" and "Sacrifice (Eat Me Up)," proving his versatility across different vocal styles and genres.11

What sets Jay apart is not flashiness, but quiet strength. He is not the loudest in the room, nor does he seek the spotlight constantly. Instead, Jay operates with steady reliability—the member who shows up, does the work, takes care of others, and leads by example. In an industry that often rewards extroversion and spectacle, Jay's understated charisma and grounded presence offer something different: authenticity and depth.

Members have repeatedly emphasized how essential Jay is to ENHYPEN's dynamic. Ni-ki once said, "Jay hyung doesn't say much, but when he does, everyone listens. He has this way of making you feel safe." Jake, who shares a similar Korean-American background, described Jay as "the older brother I never had—someone who understands what it's like to be between two worlds and still find your place."12

From Seattle to Seoul, from Ground to second place, from trainee to global artist and fashion icon, Jay's journey has been defined by resilience, sacrifice, and quiet determination. He left everything familiar at 15 to chase a dream in a foreign country. He endured loneliness, cultural adjustment, and the brutal competition of I-LAND. And through it all, he became not just a successful idol, but a pillar of strength for those around him. The boy who crossed the Pacific alone has become the man who makes sure no one in his group ever feels alone. That is Jay's legacy—and it is still being written.