
The Japanese music community is mourning the unexpected loss of singer luz (real name: Koji Tatewaki), who passed away on August 19, 2025, at the age of just 32. His agency, ESPERANZA, officially announced the news on August 20, leaving fans shocked and heartbroken at the sudden departure of an artist whose voice and presence had left an undeniable mark on both the utaite and anime music scenes.
Born in Japan in 1993, luz first rose to prominence in the early 2010s as part of the utaite communityβa group of singers who became popular for performing and uploading covers of Vocaloid songs and other well-known tracks on platforms like Nico Nico Douga. With his deep, rich, and versatile voice, he quickly stood out, gathering a passionate following among listeners who admired the emotional weight he carried in his performances. Unlike many utaite, who often kept to a niche audience, luzβs talent and charisma allowed him to cross over into mainstream recognition.

As his career developed, luz expanded beyond covers and began releasing original works. His distinct vocal tone made him especially suited for darker, emotionally intense songs, though he was equally adept at lighter pop melodies. In addition to solo activities, he frequently collaborated with other notable utaite and Vocaloid producers, creating a body of work that showcased not only his vocal skill but also his ability to connect with fans on a deeply personal level.
One of luzβs most prominent contributions to the wider anime community came in 2018, when he performed βSISTER,β the ending theme for the anime Cutie Honey Universe. The songβs passionate delivery perfectly complemented the seriesβ mix of action and emotion, helping it stand out among that yearβs anime soundtracks. Later, in 2023, luz performed βKakuriyo,β the opening theme for the supernatural horror anime Dark Gathering.The track, blending haunting melodies with his powerful vocals, became a favorite among fans and further established luz as a respected anime music artist.
Despite his achievements, luz remained deeply connected to his roots as an utaite. He often expressed gratitude toward the fan community that had supported him from his earliest uploads to his professional career. This strong bond with his listeners made news of his passing all the more devastating, as many fans felt they had grown alongside him over more than a decade of music.
ESPERANZA, his agency, has not released detailed information about the cause of death, only stating that the singer passed unexpectedly. The announcement emphasized both his contributions to music and the grief felt by colleagues, collaborators, and loved ones. Outpourings of condolences have already begun flooding social media platforms, with fans, fellow utaite, and anime music creators sharing memories, tributes, and messages of gratitude for luzβs artistry.
Luzβs legacy lies not only in the songs he left behind but also in the role he played in bridging internet-based music communities and the professional entertainment industry. Many young utaite and independent singers viewed him as proof that passion and persistence could open doors to mainstream success. His journey from covering Vocaloid songs to providing themes for televised anime reflected the changing landscape of Japanese music, where online talent could rise to prominence in traditional media.
As fans continue to revisit his discography, from heartfelt covers uploaded in his early years to his polished anime theme songs, it is clear that luzβs voice will continue to resonate. His music carried a rare combination of strength and vulnerability, qualities that made his performances timeless. Though his life was tragically cut short, his impact remains profound.
At just 32, luz had already accomplished much, and there is little doubt he had many more artistic milestones ahead. His passing is not only a loss for his fans but also for the broader Japanese music industry, which has lost a voice that could not easily be replaced. As tributes pour in, one message is clear: luz will be remembered for the emotional power of his singing and the connections he forged with people around the world.
For those who discovered him through anime, through Vocaloid covers, or through his original releases, luzβs music remains a reminder of the passion and creativity that defined his career. While his journey has come to an untimely end, his songs will continue to echo in the hearts of listeners for years to come.