Akira Tozawa
On January 12, 2015, Kzy, as the masked Dr. Muscle, defeated Eita in the finals of a tournament to win the vacant Open the Brave Gate Championship. He unmasked four days later, betraying Mad Blankey and jumping to Dia.Hearts. On February 28, Kzy lost the Open the Brave Gate Championship to Akira Tozawa. On February 4, 2016, Dia.HEARTS was forced to disband after he took the final fall in an elimination match which also included Monster Express and VerserK. On May 28, Kzy, along with BxB Hulk, YAMATO, and Yosuke♥Santa Maria, formed a new unit named Tribe Vanguard.