Masami

Masami (마사미), born Akiba Masami (秋葉正美) on April 14, 2005, is the Japanese rapper in ALL(H)OURS, the seven-member boy group launched by EDEN Entertainment. He entered the public rollout in late 2023 and officially debuted with the group on January 10, 2024 through the first mini album All Ours, immediately giving the lineup a sharper rap color and a direct bridge to Japanese fans following the team's early rise.

Masami's value inside ALL(H)OURS is straightforward. He brings attack and pace. The group's music leans on performance pressure, chant-ready hooks, and hard-edged transitions, and his delivery helps lock that structure in place. As the only Japanese member, he also adds a distinct identity point within a group that has moved quickly from rookie introduction to a deeper mini-album run.

That catalog has already built real weight. Since debut, Masami has appeared across All Ours, Witness, Crisis, Phantom, and 2026's No Doubt, giving him a clean through-line across every official ALL(H)OURS release so far. For fans tracking the group's growth, his page is less about solo detours and more about the way he helps define ALL(H)OURS' core performance identity in real time.