Yūki Kaji

Yūki Kaji is a Japanese voice actor, singer, and actor whose voice has become synonymous with some of the most iconic anime characters of the past two decades. Born September 3, 1985, in Tokyo, he has voiced over 466 characters across 380 productions, making him one of the most prolific seiyū in the industry today.

Kaji is the voice behind Eren Yeager in Attack on Titan, Shoto Todoroki in My Hero Academia, and Meliodas in The Seven Deadly Sins, among countless others. His range spans from intense, brooding leads to comedic and even absurd roles, a versatility that keeps him in constant demand. As of 2026, he continues to take on new projects, including the upcoming Cyborg 009: Nemesis anime, and has launched his own company, FRACTAL, focused on voice AI technology and talent management.

Fans admire Kaji not just for his performances but for his forward-thinking advocacy around voice rights in the age of generative AI. His willingness to embrace unconventional projects, like voicing cockroach love interests in a dating simulator, endears him to a global audience that tracks his every move. [edit]

Yūki Kaji was born and raised in Tokyo, though he keeps most details of his childhood private. His path into voice acting was far from easy. He faced a string of audition rejections in his early years, a period he has spoken about with remarkable candor. In December 2025, he publicly reflected on those struggles while celebrating a new role, framing them as the foundation of his resilience.

He made his industry debut in 2004, but recognition didn't come quickly. Early work included minor roles in anime and video games, gradually building his resume. A significant early break came with the role of Hope Estheim in Final Fantasy XIII (2009–2010), a vengeful boy character that showcased his ability to convey emotional depth. This role helped him gain traction and led to more prominent parts in the early 2010s, including Koichi Hirose in JoJo's Bizarre Adventure and the lead in Accel World (2012).

Before his breakthrough, Kaji also worked as a radio personality and appeared in stage productions, honing his craft. These formative years, marked by persistence and gradual progress, are a story his fans love to tell newcomers. [edit]

Yūki Kaji's breakthrough arrived in 2013 when he was cast as Eren Yeager in Attack on Titan. The show became a global phenomenon, and Kaji's intense, raw performance as the vengeance-driven protagonist turned him into a household name among anime fans. That same year, he began voicing Shoto Todoroki in My Hero Academia, a role that further cemented his status as a leading seiyū. He also took on Meliodas in The Seven Deadly Sins, showcasing his ability to switch between brooding and playful tones.

Throughout the 2010s, Kaji became one of the most in-demand voice actors in Japan, appearing in hit series like Fairy Tail (as Lyon Vastia) and Accel World. His career continued to evolve in the 2020s. In January 2026, he joined the cast of DARK MOON: The Blood Altar. In May 2026, he was announced as Joe Shimamura (009) in the upcoming Cyborg 009: Nemesis, a return to classic sci-fi roots that excited long-time fans. In June 2026, he voiced four romantic cockroach characters in a dating simulator created by a Japanese pesticide company, a bizarre project that generated international media coverage and showcased his self-deprecating humor.

In February 2026, Kaji announced he would leave his agency VIMS after 13 years, and in April he officially went independent, launching his own company called FRACTAL. This company focuses on voice AI technology and talent management, with a particular emphasis on protecting voice rights through a voice watermarking system called Soyogi Fractal. This move positioned him as a leader in the industry's response to generative AI. [edit]

Yūki Kaji's public image is built on remarkable versatility. He can deliver gut-wrenching intensity as Eren Yeager and then turn around to voice four romantic cockroaches with equal commitment. This range makes him a favorite among directors and fans alike. He is also seen as a forward-thinking industry figure, unafraid to embrace new technology while advocating for performer rights. His decision to launch FRACTAL and develop voice watermarking technology shows a proactive approach to the challenges posed by AI. Media portray him as one of the most prolific and influential voice actors of his generation, a reputation earned through sheer volume and consistent quality.

His social media presence reflects his down-to-earth personality. He shares behind-the-scenes glimpses of recording sessions and interacts with fans in a warm, unpretentious manner. His willingness to poke fun at himself, especially during the cockroach dating simulator incident, endears him to a broad audience. He's not just a voice; he's a personality that fans feel they know. [edit]

Yūki Kaji's fanbase is as global as it is passionate, though it operates without a single collective name. Fans gather on platforms like Reddit and Twitter to dissect his roles, celebrate his resilience after early rejections, and track his ever-expanding career. His transition from VIMS to independence in April 2026 sparked intense discussion across anime communities, with many praising his bold move into AI advocacy. The community also rallied around his willingness to embrace the bizarre, such as voicing four romantic cockroaches for a pesticide maker's dating simulator in June 2026. These moments fuel a culture built on admiration for his versatility rather than organized rituals or campaigns.

In the iFANN Global Fame Rankings, Kaji currently holds the 56th most famous person in J-Pop / J-Rock position, a slight dip from his previous standing. His prominence remains anchored by the sheer volume of his contributions, with over 466 roles across 380 titles. His Wikipedia page is read in 17 languages, with significant traffic from Japan, the U.S., and China, reflecting his worldwide reach. [edit]

Kaji has voiced more than 466 characters across 380 different productions, establishing himself as one of the most prolific performers in the industry. In February 2026, he announced his departure from his long-time agency VIMS to launch an independent company focused on Voice AI technology. His new project, Soyogi Fractal, aims to develop a voice watermarking system designed to protect voice rights against generative AI misuse. This strategic move positioned him at the forefront of the industry's response to technological disruption. Another defining moment occurred in June 2026 when he starred in a unique dating simulator created by a Japanese pesticide company. The game featured four romantic interests that were all cockroaches, a role Kaji described humorously as his first time romancing bugs. He later returned to his sci-fi roots in May 2026 with heavy promotion for his casting as Joe Shimamura in the upcoming Cyborg 009: Nemesis anime. Fans frequently cite his journey of facing repeated audition rejections before finding success as a foundational story of persistence. In December 2025, he publicly reflected on these early struggles while celebrating a new role in an original anime by the creator of Boys Over Flowers. [edit]

Yūki Kaji is married to fellow voice actress Ayana Taketatsu, a well-known performer in her own right, famous for roles like Azusa Nakano in K-On! and Zero Two in Darling in the Franxx. The couple has kept their relationship relatively private, but they are considered one of the industry's power couples. As of 2026, they have not publicly announced any children. Kaji tends to keep his family life out of the spotlight, and little is known about his parents or siblings. He has occasionally mentioned his family in interviews but prefers to focus on his work. [edit]

Yūki Kaji frequently collaborates with other top voice actors. He appeared alongside Yuichi Nakamura and Saori Hayami at the Cyborg 009: Nemesis preview screening in August 2026. His wife, Ayana Taketatsu, is also a celebrated voice actress, and the two have occasionally worked together on projects. [edit]

Yūki Kaji keeps his personal life largely out of the public eye, and his marriage to Ayana Taketatsu is the most well-documented relationship in his life. The couple tied the knot in 2019, though they had been together for several years prior. They are both prominent voice actors, and their union was celebrated by fans across the anime community.

There is no public record of any significant relationships before his marriage, as Kaji has always been discreet about his private affairs. As of 2026, he remains married to Taketatsu, and the couple has not announced any children. [edit]

Yūki Kaji's income comes primarily from his extensive voice acting career, which includes over 466 roles across anime, video games, and films. He also earns from music releases, live appearances, and merchandise. In 2026, he made a significant career move by leaving his agency VIMS to go independent, which allows him to directly manage his bookings and keep a larger share of his earnings. This shift, combined with the launch of his own company FRACTAL, opened new revenue streams in voice AI technology and talent management.

While specific figures are not publicly disclosed, iFANN's editorial research estimates his net worth at approximately $5 million as of 2026. This estimate takes into account his long career, the volume of his work, and his recent entrepreneurial ventures. His voice AI project, Soyogi Fractal, is still in development but has the potential to become a valuable asset in the industry's fight against AI voice cloning. [edit]