Hagiwa

Hagiwa is the masked drummer who gives hrtz.wav its strangest and most instantly recognizable edge. He emerged through Mnet's Steal Heart Club, won the drum position, and debuted under Kakao Entertainment on April 8, 2026 with the band's first mini album The First Wave. In a rookie market that often smooths out personality, Hagiwa arrived with a fully formed visual hook and enough instrumental credibility to make the concept feel earned rather than decorative.

Kakao's official debut rollout framed him as a drummer who can play with both legs and bring a distinct energy to the group. That matters because hrtz.wav is being pushed as a real band, not just an idol act styled around instruments. The group's youth-pop rock sound depends on momentum, texture, and live chemistry, and Hagiwa sits right at the center of that rhythm engine. His masked image adds curiosity, but the stronger story is that he already feels essential to the band's performance identity.

The first phase of his career is moving quickly. hrtz.wav debuted with The First Wave, promoted NINETEEN as the release that best defines the group, and lined up early expansion points including Awesome Music Festival 2026, KCON JAPAN 2026, and a Perfect Crown OST. For Hagiwa, that gives the debut era real range: survival-show validation, immediate festival visibility, and soundtrack exposure. He still carries some mystery, but the core positioning is obvious. He is not just the member in the mask. He is a key reason hrtz.wav already feels like a band with a point of view.