After graduating from the Department of Vocal Music at Tokyo University of the Arts, he studied abroad in Vienna as a scholarship student of the same university. He made his debut at the Lehar Festival in Austria in 2018, and from that season he will play the lead role in various operettas at theaters across Germany. In 2023, he will debut at the world's largest operetta festival, the Mörbisch Lake Festival, and begin his activities in Japan. From 2024 to early 2025, he will appear in the German tour of over 40 performances as Camille in the operetta "The Merry Widow". In February, the vocal group REAL TRAUM, of which he is the leader, sold out the Orchard Hall and achieved great success. On the YouTube channel "Vocalist KEN TAKASHIMA", he releases various songs regardless of genre, and is currently one of the most popular classical male singers.