About Kazuki Watanabe (musician)
Kazuki Watanabe, known by his stage name Kazuki (華月), was a Japanese musician known as guitarist and lead songwriter of the visual kei rock band Raphael. The group became quite popular, with all their releases entering the top 40 of the Oricon chart, before disbanding after Kazuki died at the age of 19. All of their songs are instrumental because Kazuki died before he could record his voice. In 2012, they reunited for two concerts on October 31 (Kazuki's 12th death anniversary) and November 1, and released a re-recording of their hit 1999 song "Eternal Wish (Todokanu Kimi e)" as a single.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.