R&B SOURCE on Instagram: "Kazuki Hayashi, one of Japan’s foremost R&B singer-songwriters. As the vocalist of the five-member HIP HOP group DOBERMAN INFINITY, he has showcased his presence by leading many of their songs with a powerful voice rooted in R&B. In 2023, he launched his long-awaited solo career, writing and composing his own music while demonstrating the artistry and creativity that are making him a standout figure in today’s music scene. In 2025, to, Kazuki Hayashi’s second album—enti